springMVC3学习(一)--框架搭建

本人是基于3.1.1版本开发，如遇jar包版本冲突等其他问题，概不负责。

一：新建web工程，spring001

忽略

二：添加springframework依赖jar包

将dist下的jar全部加进去 然后另加一个commons-logging.jar

三：修改web.xml

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1. <servlet>
2. <servlet-name>springMVC</servlet-name>
3. <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
4. <init-param>
5. <param-name>contextConfigLocation</param-name>
6. <param-value>/WEB-INF/config/springMVC.xml</param-value>
7. </init-param>
8. <load-on-startup>1</load-on-startup>
9. </servlet>
11. <servlet-mapping>
12. <servlet-name>springMVC</servlet-name>
13. <url-pattern>/</url-pattern>
14. </servlet-mapping>

默认DispatcherServlet会加载WEB-INF/[DispatcherServlet的Servlet名字]-servlet.xml配置文件，

本示例为WEB-INF/springMVC-servlet.xml

默认路径为WEB-INF下,也可修改为如下配置

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1. <init-param>
2. <param-name>contextConfigLocation</param-name>
3. <!--<param-value>classpath:conf/springMVC.xml</param-value>-->
4. <!--<param-value>classpath:/conf/springMVC.xml</param-value>-->
5. <!--<param-value>classpath*:/conf/springMVC.xml</param-value>-->
6. <!--以上三种形式也可以-->
7. <param-value>classpath:conf/springMVC.xml</param-value>
8. </init-param>

四：添加springMVC配置文件

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1. <?xmlversion="1.0"encoding="UTF-8"?>
2. <beansxmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"
4. xmlns:context="http://www.springframework.org/schema/context"
5. xmlns:mvc="http://www.springframework.org/schema/mvc"
6. default-lazy-init="true"
7. xsi:schemaLocation="
8. http://www.springframework.org/schema/beans
9. http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
10. http://www.springframework.org/schema/context
11. http://www.springframework.org/schema/context/spring-context-3.0.xsd
12. http://www.springframework.org/schema/mvc
13. http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
14. ">
16. <!--默认扫描的包路径-->
17. <context:component-scanbase-package="com.itmyhome"/>
19. <!--添加注解驱动-->
20. <mvc:annotation-driven/>
22. <!--定义跳转的文件的前后缀-->
23. <beanid="viewResolver"
24. class="org.springframework.web.servlet.view.InternalResourceViewResolver">
25. <propertyname="prefix"value="/"/><!--默认放在WebRoot下-->
26. <propertyname="suffix"value=".jsp"/>
27. </bean>
28. </beans>

PS：<context:component-scan base-package="com.itmyhome" />

base-package后的内容只是包路径，千万不能把类名也写出来 比如com.itmyhome.Login

否则会报如下错误

警告: No mapping found for HTTP request with URI [/spring001/login] in DispatcherServlet with name 'springMVC'

五：后台Action

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1. packagecom.itmyhome;
3. importorg.springframework.stereotype.Controller;
4. importorg.springframework.web.bind.annotation.RequestMapping;
6. @Controller
7. publicclassLogin{
9. @RequestMapping(value="login")
10. publicStringlogin(){
11. System.out.println("*******已经进入*********");
12. return"welcome";//即返回welcome.jsp
13. }
14. }

六：返回JSP

新建welcome.jsp 里面随便写点内容 如：Hello springMVC!

最后在浏览器中输入地址 验证 如图：

工程目录如下：