Spirng实战学习笔记（转载）

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最新推荐文章于 2024-09-12 04:50:56 发布

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《Spring4实战第4版》2016年4月新出版的，之前的第三版看起来还是不错的，所以看到新版就直接买下来。
英文版源码地址：<a target="_blank" href="https://www.manning.com/books/spring-in-action-fourth-edition">Spring in Action, Fourth Edition Covers Spring 4</a>
<img src="https://img-blog.youkuaiyun.com/20160504190501833" alt=""> 

 

1.IOC装配Bean
参考【<a href="http://lib.youkuaiyun.com/base/javaee" class="replace_word" title="Java EE知识库" target="_blank" style="color:#df3434; font-weight:bold;">spring</a>实战4 2.2】，作者提倡无XML配置化。
1.1接口只有一个现实类
可以自动装配

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 918px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_1" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_1" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=1&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public interface CompactDisc {  </li><li class="">  </li><li class="alt">    void play();  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_1_4414705" name="code" class="java" style="display: none;">public interface CompactDisc {

void play();
}</pre>

 

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 1085px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_2" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_2" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=2&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.stereotype.Component;  </li><li class="">  </li><li class="alt">@Component  </li><li class="">public class SgtPeppers implements CompactDisc {  </li><li class="alt">  </li><li class="">    private String title = "Sgt. Pepper's Lonely Hearts Club Band";  </li><li class="alt">    private String artist = "http://blog.youkuaiyun.com/unix21";  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目SgtPeppers 】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_2_891912" name="code" class="java" style="display: none;">import org.springframework.stereotype.Component;

@Component
public class SgtPeppers implements CompactDisc {

private String title = "Sgt. Pepper's Lonely Hearts Club Band";
private String artist = "http://blog.youkuaiyun.com/unix21";

public void play() {
System.out.println("【非常醒目SgtPeppers 】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}

}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 1414px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_3" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_3" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=3&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.context.annotation.ComponentScan;  </li><li class="">import org.springframework.context.annotation.Configuration;  </li><li class="alt">  </li><li class="">@Configuration  </li><li class="alt">@ComponentScan  </li><li class="">public class CDPlayerConfig {   </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_3_4653902" name="code" class="java" style="display: none;">import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan
public class CDPlayerConfig {
}</pre>
 

单元<a href="http://lib.youkuaiyun.com/base/softwaretest" class="replace_word" title="软件测试知识库" target="_blank" style="color:#df3434; font-weight:bold;">测试</a>
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 1661px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_4" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_4" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=4&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import static org.junit.Assert.*;  </li><li class="">import org.junit.Rule;  </li><li class="alt">import org.junit.Test;  </li><li class="">import org.junit.runner.RunWith;  </li><li class="alt">import org.springframework.beans.factory.annotation.Autowired;  </li><li class="">import org.springframework.beans.factory.annotation.Qualifier;  </li><li class="alt">  </li><li class="">import org.springframework.test.context.ContextConfiguration;  </li><li class="alt">import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  </li><li class="">  </li><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfig.class)  </li><li class="alt">public class CDPlayerTest {  </li><li class="">    @Autowired  </li><li class="alt">    private CompactDisc cd;  </li><li class="">   </li><li class="alt">    @Test  </li><li class="">    public void play() {  </li><li class="alt">        cd.play();  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_4_52096" name="code" class="java" style="display: none;">import static org.junit.Assert.*;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfig.class)
public class CDPlayerTest {
@Autowired
private CompactDisc cd;

@Test
public void play() {
cd.play();
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160504191146139" alt=""> 
 
 
1.2 接口有多个实现类
【参考 Spring实战4 3.3】 
故意再写一个实现类

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 2962px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_5" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_5" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=5&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.stereotype.Component;  </li><li class="">  </li><li class="alt">@Component  </li><li class="">public class SgtPeppersNew implements CompactDisc {  </li><li class="alt">  </li><li class="">    private String title = "Sgt. Pepper's Lonely Hearts Club Band";  </li><li class="alt">    private String artist = "http://blog.youkuaiyun.com/unix21";  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目 SgtPeppersNew】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_5_640741" name="code" class="java" style="display: none;">import org.springframework.stereotype.Component;

@Component
public class SgtPeppersNew implements CompactDisc {

private String title = "Sgt. Pepper's Lonely Hearts Club Band";
private String artist = "http://blog.youkuaiyun.com/unix21";

public void play() {
System.out.println("【非常醒目 SgtPeppersNew】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}

}</pre> 
如果这个时候运行肯定会报错NoUniqueBeanDefinitionException: No qualifying bean of type
 

解决方法有两种
第一种 在实现类上 标识首选的bean，使用@Primary

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 3395px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_6" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_6" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=6&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.context.annotation.Primary;  </li><li class="">import org.springframework.stereotype.Component;  </li><li class="alt">  </li><li class="">@Component  </li><li class="alt">@Primary  </li><li class="">public class SgtPeppers implements CompactDisc {  </li><li class="alt">  </li><li class="">    private String title = "Sgt. Pepper's Lonely Hearts Club Band";  </li><li class="alt">    private String artist = "http://blog.youkuaiyun.com/unix21";  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目SgtPeppers 】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_6_8129918" name="code" class="java" style="display: none;">import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;

@Component
@Primary
public class SgtPeppers implements CompactDisc {

private String title = "Sgt. Pepper's Lonely Hearts Club Band";
private String artist = "http://blog.youkuaiyun.com/unix21";

public void play() {
System.out.println("【非常醒目SgtPeppers 】>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}

}</pre>

 

但是这种方法不方便精确定义。
 
第二种  使用@Qualifier注解

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 3838px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_7" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_7" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=7&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import static org.junit.Assert.*;  </li><li class="">import org.junit.Rule;  </li><li class="alt">import org.junit.Test;  </li><li class="">import org.junit.runner.RunWith;  </li><li class="alt">import org.springframework.beans.factory.annotation.Autowired;  </li><li class="">import org.springframework.beans.factory.annotation.Qualifier;  </li><li class="alt">  </li><li class="">import org.springframework.test.context.ContextConfiguration;  </li><li class="alt">import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  </li><li class="">  </li><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfig.class)  </li><li class="alt">public class CDPlayerTest {  </li><li class="">    @Autowired  </li><li class="alt">    @Qualifier("sgtPeppersNew")   </li><li class="">    private CompactDisc cd;  </li><li class="alt">   </li><li class="">    @Test  </li><li class="alt">    public void play() {  </li><li class="">        cd.play();  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160504_7_3288132" name="code" class="java" style="display: none;">import static org.junit.Assert.*;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfig.class)
public class CDPlayerTest {
@Autowired
@Qualifier("sgtPeppersNew")
private CompactDisc cd;

@Test
public void play() {
cd.play();
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160504192101534" alt="">
需要注意的是bean id的首字母是类名小写。
<a target="_blank" href="http://blog.youkuaiyun.com/clerk0324/article/details/25198457">spring @Qualifier注解</a> 

 

1.3 为组件扫描的bean命名
【参考 Spring实战4  2.2.2】

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 5157px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_8" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_8" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=8&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.stereotype.Component;  </li><li class="">  </li><li class="alt">@Component("spn")  </li><li class="">public class SgtPeppersNew implements CompactDisc {  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_8_3459584" name="code" class="java" style="display: none;">import org.springframework.stereotype.Component;

@Component("spn")
public class SgtPeppersNew implements CompactDisc {</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 5324px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_9" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_9" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=9&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Autowired  </li><li class="">    @Qualifier("spn")   </li><li class="alt">    private CompactDisc cd;  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_9_7046851" name="code" class="java" style="display: none;">@Autowired
@Qualifier("spn")
private CompactDisc cd;</pre> 
也可以使用@Named效果是一样的，这是java依赖注入规范


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 5499px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_10" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_10" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=10&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import javax.inject.Named;  </li><li class="">  </li><li class="alt">@Named("spn")  </li><li class="">public class SgtPeppersNew implements CompactDisc {  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_10_5301965" name="code" class="java" style="display: none;">import javax.inject.Named;

@Named("spn")
public class SgtPeppersNew implements CompactDisc {
</pre> 
1.4 设定组件扫描的指定包
【参考 Spring实战4  2.2.3】 

如果@ComponentScan默认不设置只扫描配置类所在的包作为基础包。

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 5744px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_11" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_11" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=11&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Configuration  </li><li class="">@ComponentScan("blog.youkuaiyun.com.unix21")  </li><li class="alt">public class CDPlayerConfigTest {  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_11_7185248" name="code" class="java" style="display: none;">@Configuration
@ComponentScan("blog.youkuaiyun.com.unix21")
public class CDPlayerConfigTest {</pre>设置@ComponentScan的value属性就可以指明包名称。

 

如果想更清晰的表明设置的是基础包 
@ComponentScan(basePackages="指定包") 

 

指定多个
@ComponentScan(basePackages={"指定包1","指定包2"})
 

也可以将其指定为包中所包含的类或者接口
@ComponentScan(basePackages={"XXX.class","XX.class"}) 

 

1.5 自动装配
【参考 Spring实战4  2.2.4】 

声明自动装配需要@Autowired注解
 

1.5.1 在构造方法上使用自动装配

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 6283px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_12" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_12" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=12&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfigTest.class)  </li><li class="alt">public class CDPlayerFunTest {  </li><li class="">  </li><li class="alt">    private CompactDisc cd;  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    @Qualifier("spn")  </li><li class="alt">    public void CDPlayer(CompactDisc cd) {  </li><li class="">        this.cd = cd;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Test  </li><li class="">    public void play() {  </li><li class="alt">        cd.play();  </li><li class="">        System.out.println("【占位符】CDPlayerFunTest");  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_12_4119510" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfigTest.class)
public class CDPlayerFunTest {

private CompactDisc cd;

@Autowired
@Qualifier("spn")
public void CDPlayer(CompactDisc cd) {
this.cd = cd;
}

@Test
public void play() {
cd.play();
System.out.println("【占位符】CDPlayerFunTest");
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160505132913413" alt="">
 

另一种写法

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 7364px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_13" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_13" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=13&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">public class CDPlayer implements MediaPlayer {  </li><li class="alt">  private CompactDisc cd;  </li><li class="">  </li><li class="alt">  @Autowired  </li><li class="">  public CDPlayer(@Qualifier("spn")CompactDisc cd) {  </li><li class="alt">    this.cd = cd;  </li><li class="">  }  </li><li class="alt">  </li><li class="">  public void play() {  </li><li class="alt">    cd.play();  </li><li class="">  }  </li><li class="alt">  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_13_8343193" name="code" class="java" style="display: none;">@Component
public class CDPlayer implements MediaPlayer {
private CompactDisc cd;

@Autowired
public CDPlayer(@Qualifier("spn")CompactDisc cd) {
this.cd = cd;
}

public void play() {
cd.play();
}

}</pre> 
 

1.5.2 在属性Setter方法上使用自动装配 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 7763px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_14" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_14" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=14&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">public class CDPlayer implements MediaPlayer {  </li><li class="alt">  private CompactDisc cd;  </li><li class="">    </li><li class="alt">  @Autowired  </li><li class="">  @Qualifier("spn")  </li><li class="alt">  public void setCompactDisc(CompactDisc cd) {  </li><li class="">    this.cd = cd;  </li><li class="alt">  }  </li><li class="">  </li><li class="alt">  public void play() {  </li><li class="">    cd.play();  </li><li class="alt">  }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_13_1313609" name="code" class="java" style="display: none;">@Component
public class CDPlayer implements MediaPlayer {
private CompactDisc cd;

@Autowired
@Qualifier("spn")
public void setCompactDisc(CompactDisc cd) {
this.cd = cd;
}

public void play() {
cd.play();
}
}</pre> 
避免异常声明  @Autowired(required = false)，如果没有匹配的bean，Spring会让这个bean处于未装配转态，但是需要谨慎对待这个设置，代码需要做null检查。


@Autowired是Spring特有的注解，可以替换为@Inject，@Inject来源自Jave依赖注入规范。 

 

1.6 创建自定义的限定符
【参考 Spring实战4  3.3.2】 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 8266px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_15" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_15" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=15&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">@Qualifier("cold")  </li><li class="alt">public class IceCream implements CompactDisc {  </li><li class="">  </li><li class="alt">    private String title = "Sgt. Pepper's Lonely Hearts Club Band";  </li><li class="">    private String artist = "The Beatles";  </li><li class="alt">  </li><li class="">    public void play() {  </li><li class="alt">        System.out.println("【非常醒目 IceCream】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_15_2230693" name="code" class="java" style="display: none;">@Component
@Qualifier("cold")
public class IceCream implements CompactDisc {

private String title = "Sgt. Pepper's Lonely Hearts Club Band";
private String artist = "The Beatles";

public void play() {
System.out.println("【非常醒目 IceCream】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}
}</pre>

 

测试用例 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 8585px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_16" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_16" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=16&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes=CDPlayerConfigTest.class)  </li><li class="alt">public class CDPlayerLogTest {  </li><li class="">  </li><li class="alt">  @Autowired  </li><li class="">  private MediaPlayer player;  </li><li class="alt">    </li><li class="">  @Autowired  </li><li class="alt">  @Qualifier("sp")  </li><li class="">  private CompactDisc cd;  </li><li class="alt">    </li><li class="">  @Autowired  </li><li class="alt">  @Qualifier("cold")  </li><li class="">  private CompactDisc cd2;  </li><li class="alt">    </li><li class="">  @Test  </li><li class="alt">  public void cdShouldNotBeNull() {  </li><li class="">    assertNotNull(cd);  </li><li class="alt">  }  </li><li class="">  </li><li class="alt">  @Test  </li><li class="">  public void play() {  </li><li class="alt">    player.play();  </li><li class="">    cd.play();  </li><li class="alt">    cd2.play();  </li><li class="">  }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_16_7944531" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes=CDPlayerConfigTest.class)
public class CDPlayerLogTest {

@Autowired
private MediaPlayer player;

@Autowired
@Qualifier("sp")
private CompactDisc cd;

@Autowired
@Qualifier("cold")
private CompactDisc cd2;

@Test
public void cdShouldNotBeNull() {
assertNotNull(cd);
}

@Test
public void play() {
player.play();
cd.play();
cd2.play();
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160505155611379" alt="">
 

好处：这样做的好处限定符不耦合类名，所以可以随意重构类名。
问题：重复的限定符出现在多个类上这是不允许的，因为<a href="http://lib.youkuaiyun.com/base/java" class="replace_word" title="Java 知识库" target="_blank" style="color:#df3434; font-weight:bold;">Java</a>不允许同一个条目上重复出现相同类型的多个注解。
 

1.7 使用自定义限定符注解
针对上述问题可以创建自定义的限定符注解。

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 9920px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_17" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_17" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=17&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到    </li><li class="">@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法    </li><li class="alt">@Qualifier  </li><li class="">public @interface Cold {}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_17_5027128" name="code" class="java" style="display: none;">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到
@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法
@Qualifier
public @interface Cold {}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 10105px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_18" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_18" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=18&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到    </li><li class="">@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法    </li><li class="alt">@Qualifier  </li><li class="">public @interface Creamy {}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_18_3216984" name="code" class="java" style="display: none;">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到
@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法
@Qualifier
public @interface Creamy {}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 10290px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_19" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_19" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=19&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到    </li><li class="">@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法    </li><li class="alt">@Qualifier  </li><li class="">public @interface Fruity {}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_19_3566431" name="code" class="java" style="display: none;">@Retention(RetentionPolicy.RUNTIME) // 注解会在class字节码文件中存在，在运行时可以通过反射获取到
@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.METHOD,ElementType.TYPE})//定义注解的作用目标**作用范围字段、枚举的常量/方法
@Qualifier
public @interface Fruity {}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 10475px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_20" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_20" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=20&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">@Cold  </li><li class="alt">@Creamy  </li><li class="">public class IceCream implements CompactDisc {  </li><li class="alt">  </li><li class="">    private String title = "Spring 实现 第4版 读书笔记";  </li><li class="alt">    private String artist = "http://blog.youkuaiyun.com/unix21";  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目 IceCream】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_20_7263165" name="code" class="java" style="display: none;">@Component
@Cold
@Creamy
public class IceCream implements CompactDisc {

private String title = "Spring 实现第4版读书笔记";
private String artist = "http://blog.youkuaiyun.com/unix21";

public void play() {
System.out.println("【非常醒目 IceCream】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}
}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 10786px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_21" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_21" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=21&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">@Cold  </li><li class="alt">@Fruity  </li><li class="">public class Popsicle implements CompactDisc {  </li><li class="alt">  </li><li class="">    private String title = "Spring 实现 第4版 读书笔记";  </li><li class="alt">    private String artist = "http://blog.youkuaiyun.com/unix21";  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目 Popsicle】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_21_7404869" name="code" class="java" style="display: none;">@Component
@Cold
@Fruity
public class Popsicle implements CompactDisc {

private String title = "Spring 实现第4版读书笔记";
private String artist = "http://blog.youkuaiyun.com/unix21";

public void play() {
System.out.println("【非常醒目 Popsicle】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Playing " + title + " by " + artist);
}
}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 11097px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_22" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_22" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=22&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfigTest.class)  </li><li class="alt">public class CDPlayerLogTest {  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private MediaPlayer player;  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    @Qualifier("sp")  </li><li class="">    private CompactDisc cd;  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    @Cold  </li><li class="">    @Creamy  </li><li class="alt">    private CompactDisc cd2;  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    @Cold  </li><li class="alt">    @Fruity  </li><li class="">    private CompactDisc cd3;  </li><li class="alt">  </li><li class="">    @Test  </li><li class="alt">    public void cdShouldNotBeNull() {  </li><li class="">        assertNotNull(cd);  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Test  </li><li class="">    public void play() {  </li><li class="alt">        player.play();  </li><li class="">        cd.play();  </li><li class="alt">        cd2.play();  </li><li class="">        cd3.play();  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160505_22_9182776" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfigTest.class)
public class CDPlayerLogTest {

@Autowired
private MediaPlayer player;

@Autowired
@Qualifier("sp")
private CompactDisc cd;

@Autowired
@Cold
@Creamy
private CompactDisc cd2;

@Autowired
@Cold
@Fruity
private CompactDisc cd3;

@Test
public void cdShouldNotBeNull() {
assertNotNull(cd);
}

@Test
public void play() {
player.play();
cd.play();
cd2.play();
cd3.play();
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160505163924501" alt="">
 

1.8 bean的作用域
Spring定义了多重作用域，singleton单例，prototype原型等
参考：<a target="_blank" href="http://www.cnblogs.com/qq78292959/p/3716827.html">spring中scope作用域</a>
singleton单例：整个应用中，只创建bean的一个实例，默认Spring上下文中所有的bean都是单例。 

prototype原型：每次注入或者通过Spring应用上下文获取的时候，都会创建一个新的bean实例。 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 12656px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_23" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_23" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=23&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">public class Add implements AddI {  </li><li class="alt">    public  int a=0;  </li><li class="">     </li><li class="alt">    public  void Add() {  </li><li class="">        a++;  </li><li class="alt">    }  </li><li class="">      </li><li class="alt">    public  void getA() {  </li><li class="">        System.out.println("【非常醒目 Add】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>a= " +a+"");  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_23_4113982" name="code" class="java" style="display: none;">@Component
public class Add implements AddI {
public int a=0;

public void Add() {
a++;
}

public void getA() {
System.out.println("【非常醒目 Add】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>a= " +a+"");
}
}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 12967px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_24" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_24" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=24&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public interface AddI {  </li><li class="">void Add();  </li><li class="alt">    void getA();  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_24_7145624" name="code" class="java" style="display: none;">public interface AddI {
void Add();
void getA();
}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 13134px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_25" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_25" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=25&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">public class CDPlayer implements MediaPlayer {  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    @Qualifier("sp")  </li><li class="">    private CompactDisc cd;  </li><li class="alt">      </li><li class="">    @Autowired  </li><li class="alt">    private AddI a;  </li><li class="">  </li><li class="alt">    public void play() {  </li><li class="">        System.out.println("【非常醒目 CDPlayer】>>>");  </li><li class="alt">        cd.play();  </li><li class="">        a.Add();  </li><li class="alt">        a.getA();  </li><li class="">        a.Add();  </li><li class="alt">        a.getA();  </li><li class="">        System.out.println("【非常醒目 CDPlayer】<<<");  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_25_1813470" name="code" class="java" style="display: none;">@Component
public class CDPlayer implements MediaPlayer {

@Autowired
@Qualifier("sp")
private CompactDisc cd;

@Autowired
private AddI a;

public void play() {
System.out.println("【非常醒目 CDPlayer】>>>");
cd.play();
a.Add();
a.getA();
a.Add();
a.getA();
System.out.println("【非常醒目 CDPlayer】<<<");
}
}</pre>

 

测试用例 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 13615px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_26" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_26" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=26&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfigTest.class)  </li><li class="alt">public class CDPlayerLogTest {  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private MediaPlayer player;  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    @Qualifier("sp")  </li><li class="">    private CompactDisc cd;  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    @Cold  </li><li class="">    @Creamy  </li><li class="alt">    private CompactDisc cd2;  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    @Cold  </li><li class="alt">    @Fruity  </li><li class="">    private CompactDisc cd3;  </li><li class="alt">  </li><li class="">    @Test  </li><li class="alt">    public void cdShouldNotBeNull() {  </li><li class="">        assertNotNull(cd);  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private AddI a;  </li><li class="alt">      </li><li class="">    @Test  </li><li class="alt">    public void play() {  </li><li class="">        player.play();  </li><li class="alt">        cd.play();  </li><li class="">        cd2.play();  </li><li class="alt">        cd3.play();  </li><li class="">        a.getA();  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_26_1257063" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfigTest.class)
public class CDPlayerLogTest {

@Autowired
private MediaPlayer player;

@Autowired
@Qualifier("sp")
private CompactDisc cd;

@Autowired
@Cold
@Creamy
private CompactDisc cd2;

@Autowired
@Cold
@Fruity
private CompactDisc cd3;

@Test
public void cdShouldNotBeNull() {
assertNotNull(cd);
}

@Autowired
private AddI a;

@Test
public void play() {
player.play();
cd.play();
cd2.play();
cd3.play();
a.getA();
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160506173451878" alt="">
 

再写一个多线程

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 14964px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_27" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_27" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=27&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public class ClientThread extends Thread {  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private AddI a;  </li><li class="alt">  </li><li class="">    @Autowired  </li><li class="alt">    public ClientThread(AddI a) {  </li><li class="">        this.a = a;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    public void run() {  </li><li class="">        a.Add();  </li><li class="alt">        a.getA();  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_27_2961121" name="code" class="java" style="display: none;">public class ClientThread extends Thread {

@Autowired
private AddI a;

@Autowired
public ClientThread(AddI a) {
this.a = a;
}

public void run() {
a.Add();
a.getA();
}
}</pre> 
调用多线程


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 15355px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_28" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_28" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=28&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = CDPlayerConfigTest.class)  </li><li class="alt">public class SpringScopeTest {  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private AddI a;  </li><li class="alt">  </li><li class="">    @Test  </li><li class="alt">    public void Scope() {  </li><li class="">        for (int i = 0; i < 10; i++) {  </li><li class="alt">            ClientThread t = new ClientThread(a);  </li><li class="">            t.start();  </li><li class="alt">        }  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_28_5992764" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfigTest.class)
public class SpringScopeTest {

@Autowired
private AddI a;

@Test
public void Scope() {
for (int i = 0; i < 10; i++) {
ClientThread t = new ClientThread(a);
t.start();
}
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160506174355306" alt=""> 
改为SCOPE_PROTOTYPE

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 16430px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_29" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_29" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=29&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Component  </li><li class="">@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)  </li><li class="alt">//@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)  </li><li class="">public class Add implements AddI {  </li><li class="alt">    public  int a=0;  </li><li class="">     </li><li class="alt">    public  void Add() {  </li><li class="">        a++;  </li><li class="alt">    }  </li><li class="">      </li><li class="alt">    public  void getA() {  </li><li class="">        System.out.println("【非常醒目 Add】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>a= " +a+"");  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160506_29_3314562" name="code" class="java" style="display: none;">@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
//@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
public class Add implements AddI {
public int a=0;

public void Add() {
a++;
}

public void getA() {
System.out.println("【非常醒目 Add】>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>a= " +a+"");
}
}
</pre> 
<img src="https://img-blog.youkuaiyun.com/20160506174802602" alt=""> 

<img src="https://img-blog.youkuaiyun.com/20160506174808093" alt=""> 

看到差异了吧。
 

补充说明：@Repository、@Service、@Controller 和 @Component将类标识为Bean，都是一样的，用在不同的地方而已。
 

2.AOP切面编程
定义接口

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 18258px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_30" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_30" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=30&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public interface PerformanceI {  </li><li class="">    public void perform();  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160511_30_1073147" name="code" class="java" style="display: none;">public interface PerformanceI {
public void perform();
}</pre> 
实现类


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 18433px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_31" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_31" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=31&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.stereotype.Component;  </li><li class="">  </li><li class="alt">@Component  </li><li class="">public class Performance implements PerformanceI{  </li><li class="alt">    public void perform(){  </li><li class="">    System.out.println("【非常醒目  Performance perform 调用中】 By http://blog.youkuaiyun.com/unix21");     </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160511_31_9502982" name="code" class="java" style="display: none;">import org.springframework.stereotype.Component;

@Component
public class Performance implements PerformanceI{
public void perform(){
System.out.println("【非常醒目 Performance perform 调用中】 By http://blog.youkuaiyun.com/unix21");
}
}</pre> 
定义切面


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 18698px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_32" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_32" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=32&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.aspectj.lang.annotation.After;  </li><li class="">import org.aspectj.lang.annotation.AfterThrowing;  </li><li class="alt">import org.aspectj.lang.annotation.Aspect;  </li><li class="">import org.aspectj.lang.annotation.Before;  </li><li class="alt">  </li><li class="">@Aspect  </li><li class="alt">public class MyAspect {  </li><li class="">    @Before("execution(* com.demo.PerformanceI.perform(..))")  </li><li class="alt">    public void before(){  </li><li class="">    System.out.println("【非常醒目 [方法调用前] 】");  </li><li class="alt">    }  </li><li class="">      </li><li class="alt">    @After("execution(* com.demo.PerformanceI.perform(..))")  </li><li class="">    public void after(){  </li><li class="alt">    System.out.println("【非常醒目 [方法调用后] 】");  </li><li class="">    }  </li><li class="alt">      </li><li class="">    @AfterThrowing("execution(* com.demo.PerformanceI.perform(..))")  </li><li class="alt">    public void afterThrowing(){  </li><li class="">    System.out.println("【非常醒目 [方法异常后] 】");  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160511_32_8281483" name="code" class="java" style="display: none;">import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

@Aspect
public class MyAspect {
@Before("execution(* com.demo.PerformanceI.perform(..))")
public void before(){
System.out.println("【非常醒目 [方法调用前] 】");
}

@After("execution(* com.demo.PerformanceI.perform(..))")
public void after(){
System.out.println("【非常醒目 [方法调用后] 】");
}

@AfterThrowing("execution(* com.demo.PerformanceI.perform(..))")
public void afterThrowing(){
System.out.println("【非常醒目 [方法异常后] 】");
}
}</pre> 
配置文件


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 19215px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_33" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_33" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=33&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import com.demo.*;  </li><li class="">import org.springframework.context.annotation.Bean;  </li><li class="alt">import org.springframework.context.annotation.ComponentScan;  </li><li class="">import org.springframework.context.annotation.Configuration;  </li><li class="alt">import org.springframework.context.annotation.EnableAspectJAutoProxy;  </li><li class="">  </li><li class="alt">@Configuration  </li><li class="">@EnableAspectJAutoProxy  </li><li class="alt">@ComponentScan("com.demo")  </li><li class="">public class AppConfig {  </li><li class="alt">    @Bean  </li><li class="">    public MyAspect myAspect() {  </li><li class="alt">        return new MyAspect();  </li><li class="">    }  </li><li class="alt">     </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160511_33_963680" name="code" class="java" style="display: none;">import com.demo.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration
@EnableAspectJAutoProxy
@ComponentScan("com.demo")
public class AppConfig {
@Bean
public MyAspect myAspect() {
return new MyAspect();
}

}</pre>

 

测试用例

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 19624px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_34" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_34" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=34&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.junit.Test;  </li><li class="">import org.junit.runner.RunWith;  </li><li class="alt">import org.springframework.beans.factory.annotation.Autowired;  </li><li class="">import org.springframework.test.context.ContextConfiguration;  </li><li class="alt">import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  </li><li class="">  </li><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = AppConfig.class)  </li><li class="alt">public class MyTest {  </li><li class="">  </li><li class="alt">    @Autowired  </li><li class="">    private PerformanceI p1;  </li><li class="alt">      </li><li class="">    @Test  </li><li class="alt">    public void play() {  </li><li class="">        p1.perform();  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160511_34_5805466" name="code" class="java" style="display: none;">import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = AppConfig.class)
public class MyTest {

@Autowired
private PerformanceI p1;

@Test
public void play() {
p1.perform();
}
}</pre>

 

运行： 
<img src="https://img-blog.youkuaiyun.com/20160511192937830" alt=""> 
 
实现了方法调用前后的AOP效果。
这个Spring官方参考做的不错：<a target="_blank" href="http://docs.spring.io/spring/docs/4.2.5.RELEASE/javadoc-api/">http://docs.spring.io/spring/docs/4.2.5.RELEASE/javadoc-api/</a>
这里选不同的版本：<a target="_blank" href="http://docs.spring.io/spring/docs/">http://docs.spring.io/spring/docs/</a>
<img src="https://img-blog.youkuaiyun.com/20160511193434097" alt=""> 

 

3.Spring MVC
DispatcherServlet是Spring MVC的核心，每当应用接受一个HTTP请求，由DispatcherServlet负责将请求分发给应用的其他组件。 
在旧版本中，DispatcherServlet之类的servlet一般在web.xml文件中配置；但是Spring 3.1引入了注解就无需再使用web.xml文件。 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 21375px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_35" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_35" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=35&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;  </li><li class="">  </li><li class="alt">public class SpitterWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected Class<?>[] getRootConfigClasses() {  </li><li class="alt">        return new Class<?>[]{RootConfig.class};  </li><li class="">    }  </li><li class="alt">  </li><li class="">    @Override  </li><li class="alt">    protected Class<?>[] getServletConfigClasses() {  </li><li class="">        return new Class<?>[]{WebConfig.class};  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected String[] getServletMappings() {  </li><li class="alt">        return new String[]{"/"};  </li><li class="">    }  </li><li class="alt">  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160512_35_673336" name="code" class="java" style="display: none;">import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class SpitterWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[]{RootConfig.class};
}

@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[]{WebConfig.class};
}

@Override
protected String[] getServletMappings() {
return new String[]{"/"};
}

}</pre>

AbstractAnnotationConfigDispatcherServletInitializer这个类负责配置DispatcherServlet、初始化Spring MVC容器和Spring容器。 

 
正如可以通过多种方式配置DispatcherServlet一样，也可以通过多种方式启动Spring MVC特性。原来我们一般在xml文件中使用<mvc:annotation-driven>元素启动注解驱动的Spring MVC特性。这里我们使用JavaConfig配置，最简单的Spring MVC配置类代码如下： 

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 21908px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_36" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_36" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=36&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.context.annotation.Bean;  </li><li class="">import org.springframework.context.annotation.ComponentScan;  </li><li class="alt">import org.springframework.context.annotation.Configuration;  </li><li class="">import org.springframework.web.servlet.ViewResolver;  </li><li class="alt">import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;  </li><li class="">import org.springframework.web.servlet.config.annotation.EnableWebMvc;  </li><li class="alt">import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;  </li><li class="">import org.springframework.web.servlet.view.InternalResourceViewResolver;  </li><li class="alt">  </li><li class="">@Configuration  </li><li class="alt">@EnableWebMvc  </li><li class="">@ComponentScan("com.xxx.controller")  </li><li class="alt">public class WebConfig extends WebMvcConfigurerAdapter{  </li><li class="">    @Bean  </li><li class="alt">    public ViewResolver viewResolver() { //配置JSP视图解析器  </li><li class="">        InternalResourceViewResolver resolver = new InternalResourceViewResolver();  </li><li class="alt">        resolver.setPrefix("/WEB-INF/views/");  </li><li class="">        resolver.setSuffix(".jsp");  </li><li class="alt">        //可以在JSP页面中通过${}访问beans  </li><li class="">        resolver.setExposeContextBeansAsAttributes(true);  </li><li class="alt">        return resolver;  </li><li class="">    }  </li><li class="alt">  </li><li class="">    @Override  </li><li class="alt">    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {  </li><li class="">        configurer.enable(); //配置静态文件处理  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160512_36_6147194" name="code" class="java" style="display: none;">import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan("com.xxx.controller")
public class WebConfig extends WebMvcConfigurerAdapter{
@Bean
public ViewResolver viewResolver() { //配置JSP视图解析器
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
//可以在JSP页面中通过${}访问beans
resolver.setExposeContextBeansAsAttributes(true);
return resolver;
}

@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable(); //配置静态文件处理
}
}</pre>@Configuration表示这是Java配置类；@EnableWebMvc注解用于启动Spring MVC特性。 
 
通过@ComponentScan注解指定bean的自动发现机制作用的范围，被@Controller等注解修饰的web的bean将被发现并加载到spring mvc应用容器，这样就不需要在配置类中显式定义任何控制器bean了。 
 
通过@Bean注解添加一个ViewResolverbean，具体来说是InternalResourceViewResolver。
 

RootConfig的配置就非常简单了，唯一需要注意的是，它在设置扫描机制的时候，将之前WebConfig设置过的那个包排除了；也就是说，这两个扫描机制作用的范围正交。RootConfig的代码如下： 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 22715px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_37" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_37" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=37&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import org.springframework.context.annotation.ComponentScan;  </li><li class="">import org.springframework.context.annotation.Configuration;  </li><li class="alt">import org.springframework.context.annotation.FilterType;  </li><li class="">import org.springframework.web.servlet.config.annotation.EnableWebMvc;  </li><li class="alt">  </li><li class="">@Configuration  </li><li class="alt">@ComponentScan(basePackages = {"com.xxx.*"},  </li><li class="">        excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)})  </li><li class="alt">public class RootConfig {  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160512_37_9816687" name="code" class="java" style="display: none;">import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@ComponentScan(basePackages = {"com.xxx.*"},
excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)})
public class RootConfig {
}</pre>

 

写一个控制器，定义之前的IOC对象PerformanceI

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 23016px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_38" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_38" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=38&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Controller  </li><li class="">public class HomeController {  </li><li class="alt">    @Autowired  </li><li class="">    private PerformanceI p1;  </li><li class="alt">      </li><li class="">    @RequestMapping(value = "/home", method = RequestMethod.GET)  </li><li class="alt">    public String home() {  </li><li class="">        p1.perform();  </li><li class="alt">        return "home";  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160512_38_3022272" name="code" class="java" style="display: none;">@Controller
public class HomeController {
@Autowired
private PerformanceI p1;

@RequestMapping(value = "/home", method = RequestMethod.GET)
public String home() {
p1.perform();
return "home";
}
}</pre>

 

在WEB-INF/views下新增模板文件home.jsp 
<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 23335px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_39" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_39" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=39&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><%@page contentType="text/html" pageEncoding="UTF-8"%>  </li><li class=""><!DOCTYPE html>  </li><li class="alt"><html>  </li><li class="">    <head>  </li><li class="alt">        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  </li><li class="">        <title>JSP Page</title>  </li><li class="alt">    </head>  </li><li class="">    <body>  </li><li class="alt">        <h1>Spring4 & Sping MVC4 </h1><p>demo by http://blog.youkuaiyun.com/unix21</p>  </li><li class="">    </body>  </li><li class="alt"></html>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160512_39_4309027" name="code" class="html" style="display: none;"><%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>Spring4 & Sping MVC4 </h1>demo by http://blog.youkuaiyun.com/unix21
</body>
</html></pre> 
<img src="https://img-blog.youkuaiyun.com/20160512184441038" alt=""> 
 
 

下面这个是【第5章】的翻译 <a target="_blank" href="https://segmentfault.com/a/1190000004343063?_ea=575820">https://segmentfault.com/a/1190000004343063?_ea=575820</a>
 

默认首页
我们希望用户访问域名直接到默认首页，那么需要删除网站web目录下的index.html。
tomcat会自动默认去寻找在webroot目录下面的index文件，如果要使用自定义方法，则要保证webroot下面没有index相关的文件。 

<img src="https://img-blog.youkuaiyun.com/20160524101148606" alt=""> 

自己写一个index

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 24611px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_40" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_40" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=40&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RequestMapping(value = "/", method = RequestMethod.GET)  </li><li class="">    public String index() {  </li><li class="alt">        return "index";  </li><li class="">    }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160524_40_7126367" name="code" class="java" style="display: none;">@RequestMapping(value = "/", method = RequestMethod.GET)
public String index() {
return "index";
}</pre> 
再定义一个index.jsp即可

具体请参考：<a target="_blank" href="http://blog.youkuaiyun.com/caiwenfeng_for_23/article/details/45486233">Spring MVC 下设置默认访问页面的3种方式</a>
 

映射多个地址

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 24882px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_41" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_41" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=41&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RequestMapping(value = {"", "/","index"}, method = RequestMethod.GET)  </li><li class="">   public String index() {  </li><li class="alt">       return "index";  </li><li class="">   }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160524_41_491318" name="code" class="java" style="display: none;"> @RequestMapping(value = {"", "/","index"}, method = RequestMethod.GET)
public String index() {
return "index";
}</pre>或者 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 25049px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_42" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_42" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=42&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RequestMapping({"", "/","index"})  </li><li class="">   public String index() {  </li><li class="alt">       return "index";  </li><li class="">   }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160524_42_5333104" name="code" class="java" style="display: none;"> @RequestMapping({"", "/","index"})
public String index() {
return "index";
}</pre>
 

输出json
形式一

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 25268px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_43" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_43" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=43&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@ResponseBody  </li><li class="">    @RequestMapping(value = "/list", method = RequestMethod.GET,produces = "text/json;charset=UTF-8")  </li><li class="alt">    public String h1(HttpServletRequest req, HttpServletResponse res) throws Exception {  </li><li class="">        UserBean user= ...;        </li><li class="alt">        ObjectMapper mapper = new ObjectMapper();  </li><li class="">        String js=mapper.writeValueAsString(user);  </li><li class="alt">        return js;  </li><li class="">    }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160524_43_3534685" name="code" class="java" style="display: none;">@ResponseBody
@RequestMapping(value = "/list", method = RequestMethod.GET,produces = "text/json;charset=UTF-8")
public String h1(HttpServletRequest req, HttpServletResponse res) throws Exception {
UserBean user= ...;
ObjectMapper mapper = new ObjectMapper();
String js=mapper.writeValueAsString(user);
return js;
}</pre>

 

形式二

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 25533px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_44" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_44" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=44&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@ResponseBody  </li><li class="">    @RequestMapping(value = "/list", method = RequestMethod.GET)  </li><li class="alt">    public void list(HttpServletRequest req, HttpServletResponse res) throws Exception {  </li><li class="">        res.setContentType("text/json;charset=UTF-8");  </li><li class="alt">        UserBean user= ...;  </li><li class="">        ObjectMapper mapper = new ObjectMapper();  </li><li class="alt">        String js=mapper.writeValueAsString(user);  </li><li class="">        PrintWriter pWriter = res.getWriter();  </li><li class="alt">        pWriter.write(js);  </li><li class="">    }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160524_44_6424624" name="code" class="java" style="display: none;">@ResponseBody
@RequestMapping(value = "/list", method = RequestMethod.GET)
public void list(HttpServletRequest req, HttpServletResponse res) throws Exception {
res.setContentType("text/json;charset=UTF-8");
UserBean user= ...;
ObjectMapper mapper = new ObjectMapper();
String js=mapper.writeValueAsString(user);
PrintWriter pWriter = res.getWriter();
pWriter.write(js);
}</pre>

 

4.Spring4整合MyBatis3
说明：《Spring实战(第4版)》并没有提到MyBatis的整合，这个是我自己写的，写一起只为查看方便。
新建MybatisConfig文件

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 25886px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_45" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_45" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=45&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import javax.sql.DataSource;  </li><li class="">import org.mybatis.spring.SqlSessionFactoryBean;  </li><li class="alt">import org.mybatis.spring.mapper.MapperScannerConfigurer;  </li><li class="">import org.springframework.context.annotation.Bean;  </li><li class="alt">import org.springframework.context.annotation.Configuration;  </li><li class="">import org.springframework.jdbc.datasource.DataSourceTransactionManager;  </li><li class="alt">import org.springframework.jdbc.datasource.DriverManagerDataSource;  </li><li class="">import org.springframework.transaction.PlatformTransactionManager;  </li><li class="alt">import org.springframework.transaction.annotation.EnableTransactionManagement;  </li><li class="">  </li><li class="alt">@Configuration  </li><li class="">@EnableTransactionManagement  </li><li class="alt">public class MybatisConfig {  </li><li class="">  </li><li class="alt">    @Bean  </li><li class="">    public DataSource dataSource() {  </li><li class="alt">        DriverManagerDataSource dataSource = new DriverManagerDataSource();  </li><li class="">        dataSource.setUsername("admin");  </li><li class="alt">        dataSource.setPassword("admin");  </li><li class="">        dataSource.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//如果其他数据库换对应的驱动即可  </li><li class="alt">        dataSource.setUrl("jdbc:sqlserver://blog.youkuaiyun.com.unix21:3499;DatabaseName=testdb");  </li><li class="">        return dataSource;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Bean  </li><li class="">    MapperScannerConfigurer mpperScannnerConfigurer() {  </li><li class="alt">        MapperScannerConfigurer msc = new MapperScannerConfigurer();  </li><li class="">        msc.setSqlSessionFactoryBeanName("sqlSessionFactory");  </li><li class="alt">        msc.setBasePackage("com.unix.mapper");//自动扫描mapper包  </li><li class="">        return msc;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Bean(name = "sqlSessionFactory")  </li><li class="">    SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {  </li><li class="alt">        SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();  </li><li class="">        ssfb.setDataSource(dataSource);  </li><li class="alt">        ssfb.setTypeAliasesPackage("com.unix.bean");//自动扫描bean包  </li><li class="">        return ssfb;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Bean  </li><li class="">    PlatformTransactionManager transactionManager(DataSource dataSource) {  </li><li class="alt">        DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();  </li><li class="">        transactionManager.setDataSource(dataSource);  </li><li class="alt">        return transactionManager;  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160513_40_7431098" name="code" class="java" style="display: none;">import javax.sql.DataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableTransactionManagement
public class MybatisConfig {

@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setUsername("admin");
dataSource.setPassword("admin");
dataSource.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//如果其他数据库换对应的驱动即可
dataSource.setUrl("jdbc:sqlserver://blog.youkuaiyun.com.unix21:3499;DatabaseName=testdb");
return dataSource;
}

@Bean
MapperScannerConfigurer mpperScannnerConfigurer() {
MapperScannerConfigurer msc = new MapperScannerConfigurer();
msc.setSqlSessionFactoryBeanName("sqlSessionFactory");
msc.setBasePackage("com.unix.mapper");//自动扫描mapper包
return msc;
}

@Bean(name = "sqlSessionFactory")
SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {
SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
ssfb.setDataSource(dataSource);
ssfb.setTypeAliasesPackage("com.unix.bean");//自动扫描bean包
return ssfb;
}

@Bean
PlatformTransactionManager transactionManager(DataSource dataSource) {
DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();
transactionManager.setDataSource(dataSource);
return transactionManager;
}
}</pre> 
新增一个mapper接口


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 26853px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_46" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_46" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=46&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public interface  SchoolMapper {  </li><li class="">    @Select("select * from School where id =#{id}")  </li><li class="alt">    School findById(@Param("id") int id);  </li><li class="">      </li><li class="alt">    @Select("select * from School where Name like '${name}%'")  </li><li class="">    List<School> findByName(@Param("name") String name);  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160513_41_1782517" name="code" class="java" style="display: none;">public interface SchoolMapper {
@Select("select * from School where id =#{id}")
School findById(@Param("id") int id);

@Select("select * from School where Name like '${name}%'")
List<School> findByName(@Param("name") String name);
}</pre> 
测试用例


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 27100px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_47" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_47" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=47&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = MybatisConfig.class)  </li><li class="alt">//@TransactionConfiguration(defaultRollback=true)  </li><li class="">public class SchoolTest {  </li><li class="alt">    @Autowired  </li><li class="">    private SchoolMapper shoolDao;  </li><li class="alt">      </li><li class="">    @Test  </li><li class="alt">    public void findById(){  </li><li class="">        School shool = shoolDao.findById(1);  </li><li class="alt">        Assert.assertNotNull(shool);  </li><li class="">        System.out.println(shool.getName());         </li><li class="alt">    }  </li><li class="">      </li><li class="alt">    @Test  </li><li class="">    public void findByName(){  </li><li class="alt">        List<School> result = shoolDao.findByName("苏州中学");  </li><li class="">        Assert.assertNotNull(result);  </li><li class="alt">        for (School s : result) {  </li><li class="">        System.out.println(s.getName());  </li><li class="alt">        }          </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160513_42_3036253" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = MybatisConfig.class)
//@TransactionConfiguration(defaultRollback=true)
public class SchoolTest {
@Autowired
private SchoolMapper shoolDao;

@Test
public void findById(){
School shool = shoolDao.findById(1);
Assert.assertNotNull(shool);
System.out.println(shool.getName());
}

@Test
public void findByName(){
List<School> result = shoolDao.findByName("苏州中学");
Assert.assertNotNull(result);
for (School s : result) {
System.out.println(s.getName());
}
}
}</pre>
 

5.Spring4使用<a href="http://lib.youkuaiyun.com/base/redis" class="replace_word" title="Redis知识库" target="_blank" style="color:#df3434; font-weight:bold;">Redis</a>
<a href="http://lib.youkuaiyun.com/base/redis" class="replace_word" title="Redis知识库" target="_blank" style="color:#df3434; font-weight:bold;">redis</a>在日常开发中已经成为了标配了，在spring4中使用redis非常简单，无需自己去写一个jedis的工厂方法连接池之类的代码，因为Spring已经写好了，你只需要引用spring-data-redis包即可

<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 27687px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_48" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_48" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=48&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><dependency>  </li><li class="">            <groupId>org.springframework.data</groupId>  </li><li class="alt">            <artifactId>spring-data-redis</artifactId>  </li><li class="">            <version>1.7.1.RELEASE</version>  </li><li class="alt">        </dependency>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160516_43_1714955" name="code" class="html" style="display: none;"><dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.7.1.RELEASE</version>
</dependency></pre> 
Redis配置


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 27898px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_49" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_49" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=49&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Configuration  </li><li class="">public class RedisConfig {  </li><li class="alt">  </li><li class="">    @Bean  </li><li class="alt">    public RedisConnectionFactory redisCF() {  </li><li class="">        JedisConnectionFactory cf = new JedisConnectionFactory();  </li><li class="alt">        cf.setHostName("127.0.0.1");//服务器IP  </li><li class="">        cf.setPort(6379);//端口  </li><li class="alt">        cf.setPassword("密码");  </li><li class="">        return cf;  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Bean  </li><li class="">    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory cf) {  </li><li class="alt">        RedisTemplate<String, String> redis = new RedisTemplate<String, String>();  </li><li class="">        redis.setConnectionFactory(cf);  </li><li class="alt">        return redis;  </li><li class="">    }  </li><li class="alt">      </li><li class="">    @Bean  </li><li class="alt">    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory cf) {  </li><li class="">        StringRedisTemplate redis = new StringRedisTemplate();  </li><li class="alt">        redis.setConnectionFactory(cf);  </li><li class="">        return redis;  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160516_44_7952964" name="code" class="java" style="display: none;">@Configuration
public class RedisConfig {

@Bean
public RedisConnectionFactory redisCF() {
JedisConnectionFactory cf = new JedisConnectionFactory();
cf.setHostName("127.0.0.1");//服务器IP
cf.setPort(6379);//端口
cf.setPassword("密码");
return cf;
}

@Bean
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory cf) {
RedisTemplate<String, String> redis = new RedisTemplate<String, String>();
redis.setConnectionFactory(cf);
return redis;
}

@Bean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory cf) {
StringRedisTemplate redis = new StringRedisTemplate();
redis.setConnectionFactory(cf);
return redis;
}
}</pre> 
测试用例


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 28487px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_50" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_50" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=50&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RunWith(SpringJUnit4ClassRunner.class)  </li><li class="">@ContextConfiguration(classes = RedisConfig.class)  </li><li class="alt">public class RedisTest {  </li><li class="">    @Autowired  </li><li class="alt">    private StringRedisTemplate r1;  </li><li class="">    @Test  </li><li class="alt">    public void get() {  </li><li class="">          </li><li class="alt">        String foo=DateUtil.getNowTimeString();  </li><li class="">        r1.opsForValue().set("foo", foo);  </li><li class="alt">          </li><li class="">        foo=r1.opsForValue().get("foo");  </li><li class="alt">        System.out.println("【Redis 测试>>>get set】"+foo+"By http://blog.youkuaiyun.com/unix21");  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160516_45_5586413" name="code" class="java" style="display: none;">@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = RedisConfig.class)
public class RedisTest {
@Autowired
private StringRedisTemplate r1;
@Test
public void get() {

String foo=DateUtil.getNowTimeString();
r1.opsForValue().set("foo", foo);

foo=r1.opsForValue().get("foo");
System.out.println("【Redis 测试>>>get set】"+foo+"By http://blog.youkuaiyun.com/unix21");
}
}</pre> 
<img src="https://img-blog.youkuaiyun.com/20160516143826717" alt="">
 

6.Spring Security
 

<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 29368px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_51" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_51" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=51&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt">import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;  </li><li class="">  </li><li class="alt">public class SecurityWebInitializer extends AbstractSecurityWebApplicationInitializer {  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160518_46_1523177" name="code" class="html" style="display: none;">import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;

public class SecurityWebInitializer extends AbstractSecurityWebApplicationInitializer {
}</pre> 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 29535px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_52" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_52" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=52&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Configuration  </li><li class="">@EnableWebMvcSecurity  </li><li class="alt">public class SecuredConfig extends WebSecurityConfigurerAdapter {  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected void configure(HttpSecurity http) throws Exception {  </li><li class="alt">      </li><li class="">    http  </li><li class="alt">        .authorizeRequests()  </li><li class="">            .anyRequest().authenticated()  </li><li class="alt">            .and()  </li><li class="">        .formLogin()  </li><li class="alt">            .and()  </li><li class="">        .httpBasic();  </li><li class="alt">      </li><li class="">    }  </li><li class="alt">  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160518_47_4729543" name="code" class="java" style="display: none;">@Configuration
@EnableWebMvcSecurity
public class SecuredConfig extends WebSecurityConfigurerAdapter {

@Override
protected void configure(HttpSecurity http) throws Exception {

http
.authorizeRequests()
.anyRequest().authenticated()
.and()
.formLogin()
.and()
.httpBasic();

}

}</pre>

 

这个时候访问任何页面都会跳转到系统自带的登陆页面 
<img src="https://img-blog.youkuaiyun.com/20160518150056762" alt="">
基于内存的用户存储：

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 30153px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_53" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_53" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=53&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">//基于内存的用户  </li><li class="">@Override  </li><li class="alt">protected void configure(AuthenticationManagerBuilder auth) throws Exception {  </li><li class="">    auth  </li><li class="alt">            .inMemoryAuthentication()  </li><li class="">            .withUser("user1").password("pass1").roles("USER").and()  </li><li class="alt">            .withUser("user2").password("pass2").roles("USER","ADMIN");  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160518_48_5327040" name="code" class="java" style="display: none;"> //基于内存的用户
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth
.inMemoryAuthentication()
.withUser("user1").password("pass1").roles("USER").and()
.withUser("user2").password("pass2").roles("USER","ADMIN");
}</pre> 
 

故意输错用户名密码就进不去 
<img src="https://img-blog.youkuaiyun.com/20160518150906754" alt="">
 

验证 指定页面+指定权限

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 30691px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_54" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_54" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=54&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Override  </li><li class="">protected void configure(HttpSecurity http) throws Exception {  </li><li class="alt">    http  </li><li class="">          .authorizeRequests()  </li><li class="alt">              .antMatchers("/news").hasRole("USER")  </li><li class="">              .and()  </li><li class="alt">          .formLogin()  </li><li class="">            .and()  </li><li class="alt">            .httpBasic();  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160518_49_399932" name="code" class="java" style="display: none;"> @Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/news").hasRole("USER")
.and()
.formLogin()
.and()
.httpBasic();
}</pre> 
 


 

我们设定/news需要User角色的用户可以看，其他页面随便看 
<img src="https://img-blog.youkuaiyun.com/20160518174042974" alt="">
 

我们用user2登陆，由于没权限返回403
<img src="https://img-blog.youkuaiyun.com/20160518175007862?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt=""> 

只有用user1登陆才可以看到页面内容。
 

自定义登陆页
现实开发中不肯能用Spring提供的简易登陆页，除非是一个很小的内部系统。

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 31798px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_55" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_55" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=55&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Configuration  </li><li class="">@EnableWebMvcSecurity  </li><li class="alt">public class SecuredConfig extends WebSecurityConfigurerAdapter {  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected void configure(HttpSecurity http) throws Exception {  </li><li class="alt">        http  </li><li class="">                .authorizeRequests()  </li><li class="alt">                .antMatchers("/news/*").hasRole("USER")    </li><li class="">                .and()  </li><li class="alt">                .formLogin()  </li><li class="">                .loginPage("/login")  </li><li class="alt">                .defaultSuccessUrl("/")  </li><li class="">                .failureUrl("/login?error")  </li><li class="alt">                .permitAll()  </li><li class="">                .and()  </li><li class="alt">                .httpBasic();  </li><li class="">    }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160519_50_3876130" name="code" class="java" style="display: none;">@Configuration
@EnableWebMvcSecurity
public class SecuredConfig extends WebSecurityConfigurerAdapter {

@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/news/*").hasRole("USER")
.and()
.formLogin()
.loginPage("/login")
.defaultSuccessUrl("/")
.failureUrl("/login?error")
.permitAll()
.and()
.httpBasic();
}</pre> 
.antMatchers("/news/*").hasRole("USER")   ：匹配  /news/以及/news/ 开头的所有页面  需要USER权限 

.loginPage("/login")   ：自定义登陆页 
.defaultSuccessUrl("/")   ：默认成功页，如果没有权限则跳转到该页面
 .failureUrl("/login?error")  ：默认失败页面 

 


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 32347px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_56" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_56" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=56&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">// 1. /login 登录页面的常规显示  </li><li class="">// 2. /login?error 登录验证失败的展示  </li><li class="alt">// 3. /login?logout 注销登录的处理  </li><li class="">@RequestMapping(value = "/login", method = RequestMethod.GET)  </li><li class="alt">public ModelAndView login(  </li><li class="">        @RequestParam(value = "error", required = false) String error,  </li><li class="alt">        @RequestParam(value = "logout", required = false) String logout) {  </li><li class="">  </li><li class="alt">    ModelAndView model = new ModelAndView();  </li><li class="">    if (error != null) {  </li><li class="alt">        model.addObject("error", "用户名密码不对!");  </li><li class="">    }  </li><li class="alt">  </li><li class="">    if (logout != null) {  </li><li class="alt">        model.addObject("msg", "You've been logged out successfully.");  </li><li class="">    }  </li><li class="alt">    model.setViewName("login");  </li><li class="">  </li><li class="alt">    return model;  </li><li class="">  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160519_51_5130649" name="code" class="java" style="display: none;">
// 1. /login 登录页面的常规显示
// 2. /login?error 登录验证失败的展示
// 3. /login?logout 注销登录的处理
@RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView login(
@RequestParam(value = "error", required = false) String error,
@RequestParam(value = "logout", required = false) String logout) {

ModelAndView model = new ModelAndView();
if (error != null) {
model.addObject("error", "用户名密码不对!");
}

if (logout != null) {
model.addObject("msg", "You've been logged out successfully.");
}
model.setViewName("login");

return model;

}</pre> 
login.jsp


<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 32846px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_57" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_57" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=57&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt"><%@page contentType="text/html" pageEncoding="UTF-8"%>  </li><li class=""><html>  </li><li class="alt">    <head>  </li><li class="">        <title>登陆</title>  </li><li class="alt">    </head>  </li><li class="">    <body οnlοad='document.f.username.focus();'>  </li><li class="alt">        <h3>登陆页</h3>          </li><li class="">         <c:if test="${not empty error}">  </li><li class="alt">             <div  style="color: red">${error}</div>  </li><li class="">         </c:if>  </li><li class="alt">         <c:if test="${not empty msg}">  </li><li class="">            <div>${msg}</div>  </li><li class="alt">         </c:if>  </li><li class="">        <form name='f' action='/gkweb/login' method='POST'>  </li><li class="alt">            <table>  </li><li class="">                <tr><td>用户名:</td><td><input type='text' name='username' value=''></td></tr>  </li><li class="alt">                <tr><td>密码:</td><td><input type='password' name='password'/></td></tr>  </li><li class="">                <tr><td colspan='2'><input name="submit" type="submit" value="登陆"/></td></tr>                 </li><li class="alt">            </table>  </li><li class="">            <input type="hidden" name="${_csrf.parameterName}"  </li><li class="alt">                value="${_csrf.token}" />  </li><li class="">        </form>  </li><li class="alt">    </body>  </li><li class=""></html>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160519_52_1160915" name="code" class="java" style="display: none;"><%@page contentType="text/html" pageEncoding="UTF-8"%>
<html>
<head>
<title>登陆</title>
</head>
<body οnlοad='document.f.username.focus();'>
<h3>登陆页</h3>
<c:if test="${not empty error}">
<div style="color: red">${error}</div>
</c:if>
<c:if test="${not empty msg}">
<div>${msg}</div>
</c:if>
<form name='f' action='/gkweb/login' method='POST'>
<table>
<tr><td>用户名:</td><td><input type='text' name='username' value=''></td></tr>
<tr><td>密码:</td><td><input type='password' name='password'/></td></tr>
<tr><td colspan='2'><input name="submit" type="submit" value="登陆"/></td></tr>
</table>
<input type="hidden" name="${_csrf.parameterName}"
value="${_csrf.token}" />
</form>
</body>
</html></pre>此处参考：<a target="_blank" href="http://www.mkyong.com/spring-security/spring-security-form-login-example/">http://www.mkyong.com/spring-security/spring-security-form-login-example/</a>

<img src="https://img-blog.youkuaiyun.com/20160519115530515" alt=""><img src="https://img-blog.youkuaiyun.com/20160519115538285" alt="">
 

配置多个页面权限控制

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 33602px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_58" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_58" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=58&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">.antMatchers("/news/*","/user/*").hasRole("USER")  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160519_53_5908456" name="code" class="java" style="display: none;">.antMatchers("/news/*","/user/*").hasRole("USER")</pre>
写法二

<div class="dp-highlighter bg_cpp"><div class="bar"><div class="tools">[cpp] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 475px; top: 33715px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_59" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_59" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=59&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-cpp"><li class="alt">.antMatchers("/news/*").hasRole("USER")  </li><li class="">.antMatchers("/user/*").hasRole("USER")  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_54_8112833" name="code" class="cpp" style="display: none;">.antMatchers("/news/*").hasRole("USER")
.antMatchers("/user/*").hasRole("USER")</pre>可以将任意多的antMatchers()，anyRequest()连接起来，但是这些规则会按给定的顺序发挥作用，所以需要将最为具体的请求路径放在最前面，而最不具体的路径anyRequest()放在后面，不然不具体的就会覆盖掉具体的。 
 

 
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 33924px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_60" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_60" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=60&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Override  </li><li class="">protected void configure(HttpSecurity http) throws Exception {  </li><li class="alt">    http  </li><li class="">        .authorizeRequests()  </li><li class="alt">            .antMatchers("/", "/home").permitAll()  </li><li class="">            .anyRequest().authenticated()  </li><li class="alt">            .and()  </li><li class="">        .formLogin()  </li><li class="alt">            .loginPage("/login")  </li><li class="">            .defaultSuccessUrl("/helloadmin")  </li><li class="alt">            .permitAll()  </li><li class="">            .and()  </li><li class="alt">        .logout()  </li><li class="">            .permitAll();  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160519_54_5838149" name="code" class="java" style="display: none;"> @Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/", "/home").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage("/login")
.defaultSuccessUrl("/helloadmin")
.permitAll()
.and()
.logout()
.permitAll();
}</pre> 
对URL进行权限配置，使得"/", "/home"不需要登录就可以访问，其他需要登录。登录的地址是'/login'，当登录成功后将跳转到/helloadmin页面，并且登录、登出页面都是不需要登录就可以访问的。
参考：<a target="_blank" href="http://www.tianmaying.com/tutorial/spring-security">使用Spring Security进行权限验证</a>

 

.httpBasic()
支持弹窗就是windows自带的认证框进行认证。由于不好扩展这个基本没什么用，可以不用。
 

.rememberMe()
记住我的状态

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 34523px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_61" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_61" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=61&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">.rememberMe().key("web")  </li><li class="">                    .tokenValiditySeconds(1209600);  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_55_5929473" name="code" class="java" style="display: none;">.rememberMe().key("web")
.tokenValiditySeconds(1209600);</pre> 
<img src="https://img-blog.youkuaiyun.com/20160520095339422" alt="">
.logout() 

注销功能

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 34876px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_62" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_62" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=62&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Override  </li><li class="">   protected void configure(HttpSecurity http) throws Exception {  </li><li class="alt">       http  </li><li class="">               .authorizeRequests()  </li><li class="alt">                   .antMatchers("/news/*").hasRole("USER")  </li><li class="">                   .and()  </li><li class="alt">               .formLogin()  </li><li class="">                   .loginPage("/login")  </li><li class="alt">                   .defaultSuccessUrl("/")  </li><li class="">                   .failureUrl("/login?error")  </li><li class="alt">                   .usernameParameter("username")  </li><li class="">                   .passwordParameter("password")  </li><li class="alt">                   .and()  </li><li class="">               .logout()  </li><li class="alt">                   .logoutSuccessUrl("/login?logout")  </li><li class="">                   .and()  </li><li class="alt">               .rememberMe().key("gkweb")  </li><li class="">                   .tokenValiditySeconds(1209600);  </li><li class="alt">   }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_56_4614253" name="code" class="java" style="display: none;"> @Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/news/*").hasRole("USER")
.and()
.formLogin()
.loginPage("/login")
.defaultSuccessUrl("/")
.failureUrl("/login?error")
.usernameParameter("username")
.passwordParameter("password")
.and()
.logout()
.logoutSuccessUrl("/login?logout")
.and()
.rememberMe().key("gkweb")
.tokenValiditySeconds(1209600);
}</pre> 
注销就是页面给用户一个链接或者按钮

1.使用jstl声明退出路径
引用jar包

<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 35391px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_63" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_63" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=63&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><dependency>  </li><li class="">            <groupId>jstl</groupId>  </li><li class="alt">            <artifactId>jstl</artifactId>  </li><li class="">            <version>1.2</version>  </li><li class="alt">        </dependency>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_57_1724314" name="code" class="html" style="display: none;"><dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency></pre> 


<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 35576px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_64" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_64" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=64&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_58_470578" name="code" class="html" style="display: none;"><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %></pre><div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 35645px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_65" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_65" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=65&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><c:url var="logoutUrl" value="/logout"/>  </li><li class=""><form action="${logoutUrl}"  </li><li class="alt">    method="post">  </li><li class=""><input type="submit"  </li><li class="alt">    value="Log out" />  </li><li class=""><input type="hidden"  </li><li class="alt">    name="${_csrf.parameterName}"  </li><li class="">    value="${_csrf.token}"/>  </li><li class="alt"></form>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_59_8452691" name="code" class="html" style="display: none;"><c:url var="logoutUrl" value="/logout"/>
<form action="${logoutUrl}"
method="post">
<input type="submit"
value="Log out" />
<input type="hidden"
name="${_csrf.parameterName}"
value="${_csrf.token}"/>
</form></pre> 
 
2.硬编码退出路径


<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 35954px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_66" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_66" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=66&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><form action="${pageContext.request.contextPath}/logout" method="post">  </li><li class="">        <input type="submit" value="Logout" />  </li><li class="alt">        <input type="hidden"  </li><li class="">    name="${_csrf.parameterName}"  </li><li class="alt">    value="${_csrf.token}"/>  </li><li class=""></form>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_60_5247108" name="code" class="html" style="display: none;"><form action="${pageContext.request.contextPath}/logout" method="post">
<input type="submit" value="Logout" />
<input type="hidden"
name="${_csrf.parameterName}"
value="${_csrf.token}"/>
</form></pre> 
3.链接退出

<div class="dp-highlighter bg_html"><div class="bar"><div class="tools">[html] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 483px; top: 36183px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_67" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_67" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=67&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><script>  </li><li class="">        function formSubmit() {  </li><li class="alt">            document.getElementById("logoutForm").submit();  </li><li class="">        }  </li><li class="alt">    </script>  </li><li class="">  </li><li class="alt"><form action="${pageContext.request.contextPath}/logout" method="post" id="logoutForm">  </li><li class="">            <c:if test="${pageContext.request.userPrincipal.name != null}">  </li><li class="alt">      <h2>  </li><li class="">        Welcome : ${pageContext.request.userPrincipal.name} | <a href="javascript:formSubmit()"> 退出1-链接</a>  </li><li class="alt">      </h2>  </li><li class="">    </c:if>  </li><li class="alt">              </li><li class="">            <input type="submit" value="退出1-按钮" />  </li><li class="alt">            <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>  </li><li class="">        </form>  </li><li class="alt">          </li><li class="">        <c:url var="logoutUrl" value="/logout"/>  </li><li class="alt">        <form action="${logoutUrl}" method="post">  </li><li class="">            <c:if test="${pageContext.request.userPrincipal.name != null}">  </li><li class="alt">      <h2>  </li><li class="">        Welcome : ${pageContext.request.userPrincipal.name} | <a href="javascript:formSubmit()"> 退出2-链接</a>  </li><li class="alt">      </h2>  </li><li class="">    </c:if>  </li><li class="alt">              </li><li class="">            <input type="submit" value="退出2-按钮" />  </li><li class="alt">            <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>  </li><li class="">        </form>  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_62_4876958" name="code" class="html" style="display: none;"><script>
function formSubmit() {
document.getElementById("logoutForm").submit();
}
</script>

<form action="${pageContext.request.contextPath}/logout" method="post" id="logoutForm">
<c:if test="${pageContext.request.userPrincipal.name != null}">
<h2>
Welcome : ${pageContext.request.userPrincipal.name} | <a href="javascript:formSubmit()"> 退出1-链接</a>
</h2>
</c:if>

<input type="submit" value="退出1-按钮" />
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</form>

<c:url var="logoutUrl" value="/logout"/>
<form action="${logoutUrl}" method="post">
<c:if test="${pageContext.request.userPrincipal.name != null}">
<h2>
Welcome : ${pageContext.request.userPrincipal.name} | <a href="javascript:formSubmit()"> 退出2-链接</a>
</h2>
</c:if>

<input type="submit" value="退出2-按钮" />
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</form></pre> 
自定义的用户服务
实际开发肯定是需要去<a href="http://lib.youkuaiyun.com/base/mysql" class="replace_word" title="MySQL知识库" target="_blank" style="color:#df3434; font-weight:bold;">数据库</a>或者其他地方查询用户账号密码等

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 36834px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_68" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_68" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=68&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@Override  </li><li class="">    protected void configure(AuthenticationManagerBuilder auth) throws Exception {  </li><li class="alt">        auth.userDetailsService(new CustomUserDetailsService(userDao));  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_63_1349123" name="code" class="java" style="display: none;">@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(new CustomUserDetailsService(userDao));
}</pre>

 

注意：CustomUserDetailsService需要的bean一定要从userDetailsService调用CustomUserDetailsService的构造器传递过去，
而不能直接在CustomUserDetailsService使用@Autowired注解出来。 
 
CustomUserDetailsService集成的接口UserDetailsService无需自己重新定义，参考 <a target="_blank" href="http://blog.youkuaiyun.com/unix21/article/details/51450976">泛型推断类型不符合上限</a>
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 37105px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_69" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_69" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=69&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">public class CustomUserDetailsService implements UserDetailsService {  </li><li class="">  </li><li class="alt">    private final UserMapper userDao;  </li><li class="">    public CustomUserDetailsService(UserMapper u) {  </li><li class="alt">        this.userDao = u;  </li><li class="">    }  </li><li class="alt">  </li><li class="">    @Override  </li><li class="alt">    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {         </li><li class="">        UserBean user = userDao.findByName(username);          </li><li class="alt">        if (user == null) {  </li><li class="">            throw new UsernameNotFoundException("没有找到对应用户");  </li><li class="alt">        }  </li><li class="">        List<SimpleGrantedAuthority> authorities = new ArrayList<>();  </li><li class="alt">        authorities.add(new SimpleGrantedAuthority(user.getUtype().toString()));  </li><li class="">        return new org.springframework.security.core.userdetails.User(user.getUserName(), user.getPassword(), authorities);  </li><li class="alt">    }  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160520_64_8699163" name="code" class="java" style="display: none;">public class CustomUserDetailsService implements UserDetailsService {

private final UserMapper userDao;
public CustomUserDetailsService(UserMapper u) {
this.userDao = u;
}

@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
UserBean user = userDao.findByName(username);
if (user == null) {
throw new UsernameNotFoundException("没有找到对应用户");
}
List<SimpleGrantedAuthority> authorities = new ArrayList<>();
authorities.add(new SimpleGrantedAuthority(user.getUtype().toString()));
return new org.springframework.security.core.userdetails.User(user.getUserName(), user.getPassword(), authorities);
}
}</pre> 

跨站攻击
Spring Security3.2开始默认是开启的的，如果有特殊要求可以关闭跨站防御

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 37576px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_70" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_70" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=70&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">.csrf().disable();  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160523_65_5466165" name="code" class="java" style="display: none;">.csrf().disable();</pre> 
 
多权限组合
需要注意要以页面为单位，不然下面的配置会和上面的冲突

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 37767px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_71" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_71" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=71&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">.authorizeRequests()  </li><li class="">                    .antMatchers("/news/*","/school/*").hasAnyRole("1","4")  </li><li class="alt">                    .antMatchers("/goods/*").hasRole("4")  </li><li class="">                    .and()  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160523_66_400534" name="code" class="java" style="display: none;">.authorizeRequests()
.antMatchers("/news/*","/school/*").hasAnyRole("1","4")
.antMatchers("/goods/*").hasRole("4")
.and()</pre> 
 
自定义403页面

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 37986px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_72" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_72" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=72&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">http.authorizeRequests()  </li><li class="">        .antMatchers("/admin/**").access("hasRole('ROLE_ADMIN')")  </li><li class="alt">        .and().formLogin()  </li><li class="">        .loginPage("/login").failureUrl("/login?error")  </li><li class="alt">        .usernameParameter("username")  </li><li class="">        .passwordParameter("password")  </li><li class="alt">        .and().logout().logoutSuccessUrl("/login?logout")  </li><li class="">        .and()  </li><li class="alt">        .exceptionHandling().accessDeniedPage("/403")  </li><li class="">    }  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160523_67_5798687" name="code" class="java" style="display: none;">http.authorizeRequests()
.antMatchers("/admin/**").access("hasRole('ROLE_ADMIN')")
.and().formLogin()
.loginPage("/login").failureUrl("/login?error")
.usernameParameter("username")
.passwordParameter("password")
.and().logout().logoutSuccessUrl("/login?logout")
.and()
.exceptionHandling().accessDeniedPage("/403")
}</pre>

然后自己写一个SpringMVC的/403页面即可
参考：<a target="_blank" href="http://www.mkyong.com/spring-security/customize-http-403-access-denied-page-in-spring-security/">Spring Security : Customize 403 access denied page</a> 
 

自定义404页面
其实这个是SpringMVC干的事情，非常简单
定义一个

<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 38391px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_73" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_73" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=73&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">@RequestMapping(value = "*", method = RequestMethod.GET)  </li><li class="">public String my404() {  </li><li class="alt">    return "404";  </li><li class="">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160523_68_7906442" name="code" class="java" style="display: none;"> @RequestMapping(value = "*", method = RequestMethod.GET)
public String my404() {
return "404";
}</pre> 
 
POST参数中文乱码的解决
注意，如果没有使用Springsecurity，那么可以直接在SpingWebInitializer定义一个getServletFilters()
如下：
<div class="dp-highlighter bg_java"><div class="bar"><div class="tools">[java] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 481px; top: 38662px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_74" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_74" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=74&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt">import javax.servlet.Filter;  </li><li class="">import org.springframework.web.filter.CharacterEncodingFilter;  </li><li class="alt">import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;  </li><li class="">  </li><li class="alt">public class SpingWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected Class<?>[] getRootConfigClasses() {  </li><li class="alt">        return new Class<?>[]{RootConfig.class};  </li><li class="">    }  </li><li class="alt">  </li><li class="">    @Override  </li><li class="alt">    protected Class<?>[] getServletConfigClasses() {  </li><li class="">        return new Class<?>[]{WebConfig.class};  </li><li class="alt">    }  </li><li class="">  </li><li class="alt">    @Override  </li><li class="">    protected String[] getServletMappings() {  </li><li class="alt">        return new String[]{"/"};  </li><li class="">    }  </li><li class="alt">         </li><li class="">    @Override  </li><li class="alt">    protected Filter[] getServletFilters() {  </li><li class="">        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();  </li><li class="alt">        characterEncodingFilter.setEncoding("UTF-8");  </li><li class="">        characterEncodingFilter.setForceEncoding(true);  </li><li class="alt">        return new Filter[] { characterEncodingFilter};  </li><li class="">    }  </li><li class="alt">}  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160727_74_1500266" name="code" class="java" style="display: none;">import javax.servlet.Filter;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class SpingWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[]{RootConfig.class};
}

@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[]{WebConfig.class};
}

@Override
protected String[] getServletMappings() {
return new String[]{"/"};
}

@Override
protected Filter[] getServletFilters() {
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
characterEncodingFilter.setForceEncoding(true);
return new Filter[] { characterEncodingFilter};
}
}</pre>
 

如果使用了Springsecurity，那么需要在Springsecurity的配置文件里配置，因为CharacterEncodingFilter 需要在 SecurityFilter之前启动
<div class="dp-highlighter bg_cpp"><div class="bar"><div class="tools">[cpp] <a href="#" class="ViewSource" title="view plain" οnclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a> <a href="#" class="CopyToClipboard" title="copy" οnclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 475px; top: 39305px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_75" src="http://static.blog.youkuaiyun.com/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_75" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=75&width=18&height=18" wmode="transparent"></div> <a href="#" class="PrintSource" title="print" οnclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a><a href="#" class="About" title="?" οnclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-cpp"><li class="alt">public class SecuredConfig extends WebSecurityConfigurerAdapter {  </li><li class="">@Override  </li><li class="alt">    protected void configure(HttpSecurity http) throws Exception {  </li><li class="">        //The CharacterEncodingFilter must be started before SecurityFilter. I moved it to security configuration:  </li><li class="alt">        CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter();  </li><li class="">        encodingFilter.setEncoding("UTF-8");  </li><li class="alt">        encodingFilter.setForceEncoding(true);  </li><li class="">        http.addFilterBefore(encodingFilter,CsrfFilter.class);  </li><li class="alt">... ...  </li></ol></div><pre code_snippet_id="1672099" snippet_file_name="blog_20160727_75_2993983" name="code" class="cpp" style="display: none;">public class SecuredConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
//The CharacterEncodingFilter must be started before SecurityFilter. I moved it to security configuration:
CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter();
encodingFilter.setEncoding("UTF-8");
encodingFilter.setForceEncoding(true);
http.addFilterBefore(encodingFilter,CsrfFilter.class);
... ...</pre> 
 
 



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