struts spring mybatis maven随记

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#struts #spring #maven #string #credentials

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本文介绍了如何使用Maven配置整合Struts、Spring和MyBatis，包括依赖管理、日志输出配置、Struts验证框架、Spring与Struts整合问题以及使用servlet作为母版页的实现方式。此外，还讨论了编码问题、cookie中特殊字符处理、AD用户数字证书查询以及C++多线程对象释放问题。

1.目前整合struts spring mybatis使用的pom配置(2012-3-17)

版本一不多就各种问题了,在maven库上下了不少版本,总出问题,这次配好就记下来先

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.mycompany.app</groupId>
	<artifactId>my-webapp</artifactId>
	<packaging>war</packaging>
	<version>1.0-SNAPSHOT</version>
	<name>my-webapp Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<properties>
		<spring.version>3.0.5.RELEASE</spring.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.16</version>
		</dependency>
		<!-- servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
		</dependency>

		<!-- struts -->
		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-core</artifactId>
			<version>2.3.1.2</version>
		</dependency>
		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-junit-plugin</artifactId>
			<version>2.3.1.2</version>
		</dependency>

		<!-- spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- spring integration -->
		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-spring-plugin</artifactId>
			<version>2.3.1.2</version>
		</dependency>

		<!-- mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.0.1</version>
		</dependency>

		<!-- json -->
		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
			<version>2.1</version>
		</dependency>


		<!-- mysql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.18</version>
		</dependency>
	</dependencies>

	<build>
		<finalName>my-webapp</finalName>

		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.6</source>
					<target>1.6</target>
					<encoding>utf-8</encoding>
				</configuration>
			</plugin>
		</plugins>
	</build>


</project>

2.log4j输出mybatis的sql语句

调试的时候这个还是很重要的,一不小心SQL就写错了

这里使用的log4j.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
	<appender name="java.sql" class="org.apache.log4j.DailyRollingFileAppender">
		<param name="File" value="D:/log/web/ibatis.log" />
		<param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />
		<param name="Encoding" value="utf-8" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="%-5p %d{MM-dd HH:mm:ss} %m   (%F:%L) \n\r" />
		</layout>
	</appender>

	<logger name="java.sql">
		<level value="debug" />
		<appender-ref ref="java.sql" />
	</logger>
	<logger name="com.ibatis">
		<level value="debug" />
		<appender-ref ref="java.sql" />
	</logger>
	
	<root>
		<priority value="error" />
		<!-- <appender-ref ref="STDOUT" /> -->
	</root>

</log4j:configuration>

3.struts的验证框架

struts通过validate方法验证可以自己控制错误个数,这就不说了

使用validation.xml时经常多个错误一起就出来了,如果只需要一条错误出来就得改改了

有时候xml配置的短路(short-circuit)可以解决一部分问题,解决不了也可以通过重写addFieldError来解决

	public void addFieldError(String fieldName, String errorMessage) {
		if (!hasFieldErrors())
			super.addFieldError(fieldName, errorMessage);
	}

4.struts和spring整合的问题

通过spring ioc注入配置action bean的时候,scope比较关键的,默认是单例,还有prototype等

struts本身的action就是来一次请求创建一个实例,个人感觉还是配置prototype,

有人觉得性能问题,那如果存在这个问题,struts本身为何要这样设计,舍弃性能来换取表单与成员的对应?

当然个人见解,并没有做性能对比测试.

5.使用servlet做母版页

以前学asp.net的时候就觉得母版页挺好的,很多地方都放到母版页里,去公司实习时就发现他们webx的母版页做得还不错,开发效率提高很多

回来自己考虑过,jsp可以通过继承servlet来做,在servlet里面写上basePath,写上js的引用,做cookie登录权限验证等

下面可以看下我写的两个简单的例子

public abstract class BaseJSP extends HttpServlet{

	/**
	 * 
	 */
	private static final long serialVersionUID = 4035486135719535335L;
	protected Logger log = Logger.getLogger(this.getClass());
	private String path ;
	private String basePath;
	
	public String getPath() {
		return path;
	}
	
	public String getBasePath() {
		return basePath;
	}
	
	private void registerJS(HttpServletResponse resp, String src) throws IOException{
		PrintWriter out = resp.getWriter();
		out.write("<script type=\"text/javascript\" src=\""+src+"\"></script>\n");
	}

	public abstract void _jspService(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, ServletException;
	
	public boolean doMoreService(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{return true;}
	
	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		path =  request.getContextPath();
		basePath =  request.getScheme() + "://"
		+ request.getServerName() + ":" + request.getServerPort()
		+ path + "/";
		
		response.setContentType("text/html; charset=utf-8");
		response.setCharacterEncoding("utf-8");
		
		registerJS(response,basePath+"js/jquery-1.7.1.min.js");

		
		//子类额外的服务,如果需要则重写
		if(!doMoreService(request,response))
			return;
		
		//jsp的服务
		this.jspService(request,response);
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(req, resp);
	}

	public void jspService(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		
		_jspService(request,response);
		
	}
}

public abstract class AuthJSP extends BaseJSP {

	/**
	 * 
	 */
	private static final long serialVersionUID = -5506920461926900920L;

	private String username;
	
	public String getUsername() {
		return username;
	}
	
	@Override
	public boolean doMoreService(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String username = CookieUtil.getCookie(req,LoginAction.LOGIN_COOKIE_NAME);
		if(username==null)
		{
			resp.sendRedirect(getBasePath()+"account/login.jsp");
			log.info("未登陆,当前JSP"+this.getClass()+"无权访问");
			return false;
		}
		this.username = username;
		return true;
	}
}

然后在jsp页面继承就可以了

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" extends="com.iss.demo.servlet.AuthJSP"%>

6.maven编码和log4j编码

maven默认编译编码是gbk,如果项目编码为utf-8就容易出现乱码了(调了好久一直乱码,感谢zhao251021539帮忙解决)

pom里面加上一句

	<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.6</source>
					<target>1.6</target>
					<encoding>utf-8</encoding>
				</configuration>
			</plugin>
		</plugins>

关于编码还可以使用属性project.build.sourceEncoding

<properties>
		<project.build.sourceEncoding>GBK</project.build.sourceEncoding>
	</properties>

编码属性参见 http://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html#encoding

Log4j调整编码

	<appender name="xxx" class="xxx">
		xxx
		<param name="Encoding" value="utf-8" />
		xxx
	</appender>

7.cookie中存入特殊字符的问题

目前版本cookie存入特殊字符会导致整个值被双引号包装,比如a===/ss就会变成"a===/ss"

通过cookie查看工具可以查看到这一变化

urlencode应该可以解决,没有去尝试

因为当前的流程简单,取值时直接将双引号去掉了

8.说两个跟SSI关系不大的

一个是查AD上用户的数字证书,可以通过用户账号与证书序列号来确定证书,本来证书序列号就可以确定,再加上用户账号可以更快的确定

private Hashtable<String, Object> env;
private Properties properties;
env = new Hashtable<String, Object>();
		env.put(Context.INITIAL_CONTEXT_FACTORY,
				properties.get(Context.INITIAL_CONTEXT_FACTORY));
		env.put(Context.PROVIDER_URL, properties.get(Context.PROVIDER_URL));// 链接地址
		env.put(Context.SECURITY_AUTHENTICATION,
				properties.get(Context.SECURITY_AUTHENTICATION));
		env.put(Context.SECURITY_PRINCIPAL,
				properties.get(Context.SECURITY_PRINCIPAL));// 账号
		env.put(Context.SECURITY_CREDENTIALS,
				properties.get(Context.SECURITY_CREDENTIALS));// 密码

public String getCert(String subjectName, String sn_base64)
			throws CertificateException {
		try {
			DirContext ctx = new InitialDirContext(env); // 初始化上下文
			SearchControls searchCons = new SearchControls(); // 搜索控件
			NamingEnumeration<SearchResult> namingEnum = null;
			searchCons.setSearchScope(SearchControls.SUBTREE_SCOPE);// SUBTREE_SCOPE
			searchCons.setCountLimit(0);// 设置最大返回个数
			searchCons.setTimeLimit(0);// 超时
			// 搜索对象,第一个参数为基目录,第二个参数为fiter，fiter格式可类似于(&(CN=*)(DC=*))
			namingEnum = ctx.search("CN=Users,DC=iss,DC=local", "(CN=" + subjectName + ")",
					searchCons);
			// 遍历搜索结果
			while (namingEnum.hasMoreElements()) {
				Object obj = namingEnum.nextElement();
				SearchResult result = (SearchResult) obj;

				// 通过属性名称获取搜索结果对象的属性值
				Attribute attr = result.getAttributes().get("userCertificate");

				if (attr == null)
					continue;

				NamingEnumeration<?> values = attr.getAll();

				/*
				 * 获取同一个用户所拥有的所有证书,并对比序列号
				 */
				while (values.hasMoreElements()) {
					byte[] r = (byte[]) values.next();

					CertificateFactory factory = CertificateFactory
							.getInstance("X.509");

					ByteArrayInputStream bais = new ByteArrayInputStream(r);

					X509Certificate cert = (X509Certificate) factory
							.generateCertificate(bais);

					byte[] serialNumberByteArray = cert.getSerialNumber()
							.toByteArray();
					byte[] temp = new byte[serialNumberByteArray.length];
					/* CryptoAPI所获取的序列号字节数组与java获取的序列号字节数组反序,需要反转再对比 */
					for (int i = serialNumberByteArray.length - 1; i >= 0; i--) {
						temp[serialNumberByteArray.length - 1 - i] = serialNumberByteArray[i];
					}
					String serialNumberBase64 = (new sun.misc.BASE64Encoder())
							.encode(temp);
					if (serialNumberBase64.equals(sn_base64)) {
						String certBase64 = new sun.misc.BASE64Encoder()
								.encode(r);
						if (certBase64.contains("\n")
								|| certBase64.contains("\r"))
							certBase64 = certBase64.replaceAll("[\n\r]", "");

						return certBase64;
					}
				}
			}
		} catch (NamingException e) {
			e.printStackTrace();
		}

		return "";
	}

另外一个是写C++多线程时遇到对象释放的问题

个人C++菜鸟,高手包涵

线程A中创建对象Log log

传到线程B中使用,但是线程A跑完就会使得log被释放,B中就出现violation

自己解决方案是在线程B中拷贝一份,B中用完就释放,A中用完也自己释放自己的