标签：des style blog http io ar color os sp
SSH框架，当今最为流行的项目开发框架组合，那么掌握他的第一步是学习如何配置环境，java Web开发的无论哪种框架都离不开各种xml配置，虽然说配置在网上到处都有，但是要成为合格的程序猿，必须要明白配置中每一部分的意义，分析它的规律，因此这一步至关重要。
SSH分为SSH1和SSH2，区别主要在于Struts的版本，即Struts1和Struts2，Struts1与Struts2在配置上有所差别，
这回主要为大家介绍的是基于Struts2的SSH2框架搭建。
我们在搭建框架之前，首先一定要注意各个框架的版本，不同的版本集成方式和所需的jar包是有区别的。
SSH2框架的版本为：struts-2.2.3 + spring-2.5.6 + hibernate-3.6.8
1. 所需jar包:猛击下载免费jar包资源
struts2：
struts2-core-2.2.3.jar
struts2-spring-plugin-2.2.3.jar
xwork-core-2.2.3.jar
commons-io-2.0.1.jar
commons-lang-2.5.jar
commons-fileupload-1.2.2.jar
freemarker-2.3.16.jar
ognl-3.0.1.jar
javassist-3.12.0.GA.jar（hibernate同样需要）
spring：
spring.jar
commons-logging-1.1.1.jar
common-annotations.jar
aspectjrt.jar
aspectjweaver.jar
cglib-nodep-2.1_3.jar
（如果用BasicDataSource来配置数据库连接，还要加入以下2个包）
commons-dbcp.jar
commons-pool.jar
hibernate：
hibernate3.jar
hibernate-jpa-2.0-api-1.0.1.Final.jar
antlr-2.7.6.jar
commons-collections-3.1.jar
dom4j-1.6.1.jar
javassist-3.12.0.GA.jar
jta-1.1.jar
slf4j-api-1.6.1.jar
slf4j-nop-1.6.4.jar（这个jar包要去slf4j官网下载slf4j-1.6.4集成包）
jdbc：
ojdbc14.jar（oracle）
2. web.xml配置
注意：
① 配置自定义filter即DelegatingFilterProxy时，参数targetFilterLifecycle设为true是将filter放入web容器中成为真正意义上的filter。否则只是个代理filter，不具有filter的生命周期，因此无法执行filter的init、destroy方法。因为统一交由spring管理，所以在spring资源配置文件（如applicationContext.xml）中必须相应的并且名称为myFilter的bean。
② OpenSessionInViewFilter要将参数singleSession设置为true，否则意义不大。
③ 配置struts2建议采用StrutsPrepareAndExecuteFilter。struts.xml默认放在src根目录下，若想放置到其他地方还要将struts-default.xml和struts-plugin.xml一同配置下，否则在于其他框架结合时（如spring）就会报错。配置struts2的filter标签要放到所有filter标签的最下面，否则会有问题。
3. struts.xml配置
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<span style="background-color:rgb(255,255,255)"><!DOCTYPE struts PUBLIC
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"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
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"http://struts.apache.org/dtds/struts-2.0.dtd">
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<struts>
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<constant name="struts.objectFactory" value="spring" />
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<constant name="struts.action.extension" value="do"></constant>
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<package name="struts" namespace="/" extends="struts-default">
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<interceptors>
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<interceptor name="myInterceptor" class="myInterceptor"></interceptor>
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<interceptor-stack name="myDefult">
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<interceptor-ref name="myInterceptor"></interceptor-ref>
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<interceptor-ref name="defaultStack"></interceptor-ref>
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</interceptor-stack>
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</interceptors>
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<action name="myLogin" class="loginAction">
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<result name="success">/success.jsp</result>
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<result name="error" type="redirect">/index.jsp</result>
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</action>
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<action name="testSession" class="sessionAction">
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<interceptor-ref name="myDefult"></interceptor-ref>
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<result name="success">/success.jsp</result>
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<result name="error" type="redirect">/login.jsp</result>
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</action>
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</package>
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</struts></span>
注意：
① 执行完自定义拦截器后，还要执行struts2默认的拦截器defaultStack，否则可能会出错。
② action标签的class属性，与spring结合后要写成spring中bean的名称name。
4. applicationContext.xml
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<span style="background-color:rgb(255,255,255)"><?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:aop="http://www.springframework.org/schema/aop"
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xmlns:context="http://www.springframework.org/schema/context"
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xmlns:tx="http://www.springframework.org/schema/tx"
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xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
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http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
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http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
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http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
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<context:annotation-config/>
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<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
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<property name="configLocation" value="classpath:config/hibernate.cfg.xml"></property>
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</bean>
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<!-- 第二种方法配置sessionFactory
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<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
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<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
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<property name="url" value="jdbc:oracle:thin:@localhost:1521:wang"/>
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<property name="username" value="wang"/>
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<property name="password" value="wang"/>
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</bean>
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<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
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<property name="dataSource" ref="dataSource"/>
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<property name="hibernateProperties">
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<props>
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<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
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<prop key="hibernate.show_sql">true</prop>
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</props>
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</property>
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<property name="mappingLocations">
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<list>
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<value>classpath:test/entity/User.hbm.xml</value>
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</list>
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</property>
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</bean>
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-->
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<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
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<property name="sessionFactory" ref="sessionFactory"/>
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</bean>
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<tx:advice id="txadvice" transaction-manager="transactionManager">
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<tx:attributes>
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<tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/>
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<tx:method name="del*" propagation="REQUIRED" no-rollback-for="MyException"/>
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<tx:method name="update*" propagation="REQUIRED"/>
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<tx:method name="*" propagation="REQUIRED" read-only="true"/>
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</tx:attributes>
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</tx:advice>
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<aop:config>
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<aop:pointcut id="daoMethods" expression="execution(* test.dao.*.*(..))"/>
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<aop:advisor advice-ref="txadvice" pointcut-ref="daoMethods"/>
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</aop:config>
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<!-- 第二种方法配置事务
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<bean id="transactionProxy" class= "org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
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必须为true时CGLIB才不用强制编写DAO接口
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<property name="proxyTargetClass" value="true" />
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<property name="transactionManager" ref="transactionManager" />
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<property name="transactionAttributes">
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<props>
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<prop key="add*">PROPAGATION_REQUIRED, -Exception</prop>
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<prop key="del*">PROPAGATION_REQUIRED, +MyException</prop>
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<prop key="update">PROPAGATION_REQUIRED</prop>
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<prop key="*">PROPAGATION_REQUIRED, readOnly</prop>
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</props>
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</property>
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</bean>
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<bean id="userService" parent="transactionProxy">
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<property name="target" ref="iUserService"></property>
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</bean>
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<bean id="iUserService" class="test.service.UserServiceImpl"></bean>
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-->
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<bean id="userService" class="test.service.UserServiceImpl"></bean>
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<bean id="userDao" class="test.dao.UserDaoImpl">
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<property name="sessionFactory" ref="sessionFactory" />
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</bean>
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<bean id="myFilter" class="test.service.MyFilter"></bean>
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<bean id="loginAction" class="test.action.LoginAction" scope="prototype"></bean>
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<bean id="sessionAction" class="test.action.SessionAction" scope="prototype"></bean>
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<bean id="myInterceptor" class="test.service.MyInterceptor" scope="prototype"></bean>
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</beans></span>
注意：
① 配置事务时，如果事务是与含有sessionFactory的DAO层关联的话，要将<aop:config>标签的proxy-target-class属性设为true（第二种方法是proxyTargetClass属性），否则就会报错
② 采用Resource或Autowired注解时，bean中无需配置property属性标签。
③ 采用第二种方法配置sessionFactory时，还需要另外引入两个包（详见上述“所需jar”部分）。
5. filter与拦截器
● MyFilter.java
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<span style="background-color:rgb(255,255,255)">package test.service;
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import java.io.IOException;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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public class MyFilter implements Filter {
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private String encoding;
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@Override
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public void destroy() {
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}
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
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request.setCharacterEncoding(encoding);
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response.setCharacterEncoding(encoding);
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chain.doFilter(request, response);
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}
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@Override
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public void init(FilterConfig config) throws ServletException {
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System.out.println("========" + config.getInitParameter("encoding") + "========");
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encoding = config.getInitParameter("encoding");
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}
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}</span>
● MyInterceptor.java
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<span style="background-color:rgb(255,255,255)">package test.service;
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import java.util.Map;
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import com.opensymphony.xwork2.ActionInvocation;
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import com.opensymphony.xwork2.interceptor.Interceptor;
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@SuppressWarnings("serial")
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public class MyInterceptor implements Interceptor{
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@Override
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public void destroy() {
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}
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@Override
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public void init() {
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}
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@Override
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public String intercept(ActionInvocation invocation) throws Exception {
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Map sessionMap = invocation.getInvocationContext().getSession();
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String username = (String)sessionMap.get("username");
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if (username != null) {
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return invocation.invoke();
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}
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return "error";
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}
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}</span>
filter与拦截器（interceptor）的区别：
二者不论从结构还是功能都非常相似，但是二者是有区别的,：
① filter是基于servlet容器的，而interceptor仅限于struts2，因此filter的作用域要远大于interceptor。
② filter中doFilter方法是基于回调函数，而interceptor中intercept方法则是基于java反射。
③ filter的功能要远大于interceptor，filter除了过滤请求外通过通配符可以保护页面，图片，文件，还可以进行加密、安全过滤、权限管理等等，而Interceptor基本只能过滤请求。
④ filter拦截请求的粒度较粗，interceptor拦截请求的粒度较细。
6. action层
● LoginAction.java
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<span style="background-color:rgb(255,255,255)">package test.action;
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import javax.annotation.Resource;
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import javax.servlet.http.HttpServletRequest;
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import org.apache.struts2.ServletActionContext;
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import test.entity.User;
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import test.service.IUserService;
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import com.opensymphony.xwork2.ActionSupport;
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@SuppressWarnings("serial")
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public class LoginAction extends ActionSupport {
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@Resource
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private IUserService userService;
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private String username;
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private String password;
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public String getUsername() {
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return username;
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}
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public void setUsername(String username) {
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this.username = username;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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@Override
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public String execute() throws Exception {
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User user = new User();
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user.setUsername(username);
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user.setPassword(password);
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try {
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userService.addUser(user);
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HttpServletRequest request = ServletActionContext.getRequest();
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request.getSession().setAttribute("username", username);
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return "success";
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} catch (Exception e) {
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e.printStackTrace();
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}
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return "error";
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}
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}</span>
7. service层
● UserServiceImpl.java
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<span style="background-color:rgb(255,255,255)">package test.service;
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import java.util.List;
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import javax.annotation.Resource;
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import test.dao.IUserDao;
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import test.entity.User;
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public class UserServiceImpl implements IUserService{
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@Resource
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private IUserDao userDao;
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@Override
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public void addUser(User user) throws Exception {
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userDao.addUser(user);
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if (!"admin".equals(user.getUsername()) || !"admin".equals(user.getPassword())) {
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throw new Exception();
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}
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}
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@Override
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public boolean updateUser(User user) {
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return false;
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}
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@Override
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public boolean delUser(String username) {
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return false;
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}
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@Override
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public List<User> findAllUser() {
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return null;
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}
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}</span>
接口因为很简单，就不展示了，这里我将filter和拦截器也放到了service层，仅是个示例而已，filter或interceptor最好单独放在一层。
8. dao层
● UserDaoImpl.java
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<span style="background-color:rgb(255,255,255)">package test.dao;
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import java.util.Date;
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import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
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import test.entity.User;
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public class UserDaoImpl extends HibernateDaoSupport implements IUserDao{
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@Override
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public void addUser(User user){
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user.setName("wang");
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user.setCreateTime(new Date());
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user.setModifyTime(new Date());
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this.getHibernateTemplate().save(user);
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}
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}</span>
9. entity层
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<span style="background-color:rgb(255,255,255)">package test.entity;
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import java.util.Date;
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public class User {
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private String username;
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private String password;
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private String name;
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private String email;
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private String tell;
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private Date createTime;
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private Date modifyTime;
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public String getUsername() {
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return username;
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}
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public void setUsername(String username) {
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this.username = username;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public String getTell() {
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return tell;
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}
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public void setTell(String tell) {
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this.tell = tell;
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}
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public Date getCreateTime() {
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return createTime;
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}
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public void setCreateTime(Date createTime) {
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this.createTime = createTime;
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}
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public Date getModifyTime() {
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return modifyTime;
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}
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public void setModifyTime(Date modifyTime) {
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this.modifyTime = modifyTime;
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}
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}</span>
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----------补充说明-----------
文章中所列出的struts2的2.2jar包已经不是最新的了，这个版本有严重漏洞，
现在最新版本为2.3.15，所以。你懂的 http://struts.apache.org/download.cgi#struts23151
SSH2框架搭建和配置文件详解
标签：des style blog http io ar color os sp
原文地址：http://blog.csdn.net/love_xsq/article/details/41750081
