S2SH框架搭建

转载本文的目的是本文S2SH配置的方法跟自己平时的配置风格有些地方不一样，值得温故知新。

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

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

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">  <display-name>testSSH</display-name>  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list>    <!-- 配置资源 -->  <context-param>  <param-name>contextConfigLocation</param-name>  <param-value>classpath:config/applicationContext.xml</param-value>  </context-param>  <!-- 配置自定义filter，并由spring管理 -->  <!--   <filter>  <filter-name>myFilter</filter-name>  <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>  <init-param>    <param-name>targetFilterLifecycle</param-name>    <param-value>true</param-value>  </init-param>  <init-param>    <param-name>encoding</param-name>    <param-value>UTF-8</param-value>  </init-param>  </filter>    <filter-mapping>  <filter-name>myFilter</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>   -->    <!-- 配置CharacterEncoding，设置字符集 -->  <filter>  <filter-name>characterEncodingFilter</filter-name>  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  <init-param>    <param-name>encoding</param-name>    <param-value>UTF-8</param-value>  </init-param>  <init-param>    <param-name>forceEncoding</param-name>    <param-value>true</param-value>  </init-param>  </filter>  <filter-mapping>  <filter-name>characterEncodingFilter</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>  <!-- 将HibernateSession开关控制配置在Filter，保证一个请求一个session，并对lazy提供支持 -->  <filter>  <filter-name>hibernateFilter</filter-name>  <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>  <init-param>    <param-name>singleSession</param-name>    <param-value>true</param-value>  </init-param>  </filter>  <filter-mapping>  <filter-name>hibernateFilter</filter-name>  <url-pattern>*.do</url-pattern>  </filter-mapping>    <!-- 配置struts2 -->  <filter>  <filter-name>struts2</filter-name>  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  <init-param>  <param-name>config</param-name>  <param-value>struts-default.xml,struts-plugin.xml,/config/struts.xml</param-value>  </init-param>  </filter>  <filter-mapping>  <filter-name>struts2</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>    <!-- 配置spring -->  <listener>  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>    <!-- 页面session配置 -->  <session-config>  <session-timeout>20</session-timeout>  </session-config>    <!-- 错误页面 -->  <error-page>  <error-code>404</error-code>  <location>/error404.html</location>  </error-page></web-app>

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

<!DOCTYPE struts PUBLIC          "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"          "http://struts.apache.org/dtds/struts-2.0.dtd"><struts><!-- 将Action的创建交给spring来管理 --><constant name="struts.objectFactory" value="spring" /><!-- 更改struts2请求Action的后缀名，默认为action。若想去掉后缀，设为","即可 --><constant name="struts.action.extension" value="do"></constant><package name="struts" namespace="/" extends="struts-default"><!-- 配置拦截器 --><interceptors><interceptor name="myInterceptor" class="myInterceptor"></interceptor><interceptor-stack name="myDefult"><interceptor-ref name="myInterceptor"></interceptor-ref><interceptor-ref name="defaultStack"></interceptor-ref></interceptor-stack></interceptors><action name="myLogin" class="loginAction"><result name="success">/success.jsp</result><result name="error" type="redirect">/index.jsp</result></action><action name="testSession" class="sessionAction"><interceptor-ref name="myDefult"></interceptor-ref><result name="success">/success.jsp</result><result name="error" type="redirect">/login.jsp</result></action></package></struts>

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

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><!-- 启用spring注解支持 --><context:annotation-config/><!-- 第一种方法配置sessionFactory --><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="configLocation" value="classpath:config/hibernate.cfg.xml"></property></bean><!-- 第二种方法配置sessionFactory<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"><property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/><property name="url" value="jdbc:oracle:thin:@localhost:1521:wang"/><property name="username" value="wang"/><property name="password" value="wang"/></bean><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop><prop key="hibernate.show_sql">true</prop></props></property><property name="mappingLocations"><list><value>classpath:test/entity/User.hbm.xml</value></list></property></bean> --><!-- 第一种方法配置事务 --><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory"/></bean><tx:advice id="txadvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/><tx:method name="del*" propagation="REQUIRED" no-rollback-for="MyException"/><tx:method name="update*" propagation="REQUIRED"/><tx:method name="*" propagation="REQUIRED" read-only="true"/></tx:attributes></tx:advice> <aop:config><aop:pointcut id="daoMethods" expression="execution(* test.dao.*.*(..))"/><aop:advisor advice-ref="txadvice" pointcut-ref="daoMethods"/></aop:config><!-- 第二种方法配置事务<bean id="transactionProxy" class= "org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">必须为true时CGLIB才不用强制编写DAO接口        <property name="proxyTargetClass" value="true" />        <property name="transactionManager" ref="transactionManager" />        <property name="transactionAttributes">            <props>            <prop key="add*">PROPAGATION_REQUIRED, -Exception</prop>            <prop key="del*">PROPAGATION_REQUIRED, +MyException</prop>            <prop key="update">PROPAGATION_REQUIRED</prop>                <prop key="*">PROPAGATION_REQUIRED, readOnly</prop>            </props>        </property></bean><bean id="userService" parent="transactionProxy"><property name="target" ref="iUserService"></property></bean><bean id="iUserService" class="test.service.UserServiceImpl"></bean> --><bean id="userService" class="test.service.UserServiceImpl"></bean><bean id="userDao" class="test.dao.UserDaoImpl"><property name="sessionFactory" ref="sessionFactory" /></bean><!-- spring管理的自定义filter --><bean id="myFilter" class="test.service.MyFilter"></bean><!-- spring管理struts2的Action --><bean id="loginAction" class="test.action.LoginAction" scope="prototype"></bean><bean id="sessionAction" class="test.action.SessionAction" scope="prototype"></bean><bean id="myInterceptor" class="test.service.MyInterceptor" scope="prototype"></bean></beans>

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

package test.service;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;public class MyFilter implements Filter {private String encoding;@Overridepublic void destroy() {}@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {request.setCharacterEncoding(encoding);response.setCharacterEncoding(encoding);chain.doFilter(request, response);}@Overridepublic void init(FilterConfig config) throws ServletException {System.out.println("========" + config.getInitParameter("encoding") + "========");encoding = config.getInitParameter("encoding");}}

● MyInterceptor.java

package test.service;import java.util.Map;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.Interceptor;@SuppressWarnings("serial")public class MyInterceptor implements Interceptor{@Overridepublic void destroy() {}@Overridepublic void init() {}@Overridepublic String intercept(ActionInvocation invocation) throws Exception {Map sessionMap = invocation.getInvocationContext().getSession();String username = (String)sessionMap.get("username");if (username != null) {return invocation.invoke();}return "error";}}

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。

⑤拦截器只能对action请求起作用，而过滤器则可以对几乎所有的请求起作用。

⑥拦截器可以访问action上下文、值栈里的对象，而过滤器不能访问。

⑦在action的生命周期中，拦截器可以多次被调用，而过滤器只能在容器初始化时被调用一次

6. action层

● LoginAction.java

package test.action;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import test.entity.User;import test.service.IUserService;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial")public class LoginAction extends ActionSupport {@Resourceprivate IUserService userService;private String username;private String password;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}@Overridepublic String execute() throws Exception {User user = new User();user.setUsername(username);user.setPassword(password);try {userService.addUser(user);HttpServletRequest request = ServletActionContext.getRequest();request.getSession().setAttribute("username", username);return "success";} catch (Exception e) {e.printStackTrace();}return "error";}}

7. service层

● UserServiceImpl.java

package test.service;import java.util.List;import javax.annotation.Resource;import test.dao.IUserDao;import test.entity.User;public class UserServiceImpl implements IUserService{@Resourceprivate IUserDao userDao;@Overridepublic void addUser(User user) throws Exception {userDao.addUser(user);if (!"admin".equals(user.getUsername()) || !"admin".equals(user.getPassword())) {throw new Exception();}}@Overridepublic boolean updateUser(User user) {return false;}@Overridepublic boolean delUser(String username) {return false;}@Overridepublic List<User> findAllUser() {return null;}}

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

package test.dao;import java.util.Date;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import test.entity.User;public class UserDaoImpl extends HibernateDaoSupport implements IUserDao{@Overridepublic void addUser(User user){user.setName("wang");user.setCreateTime(new Date());user.setModifyTime(new Date());this.getHibernateTemplate().save(user);}}

9. entity层

package test.entity;import java.util.Date;public class User {private String username;private String password;private String name;private String email;private String tell;private Date createTime;private Date modifyTime;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getTell() {return tell;}public void setTell(String tell) {this.tell = tell;}public Date getCreateTime() {return createTime;}public void setCreateTime(Date createTime) {this.createTime = createTime;}public Date getModifyTime() {return modifyTime;}public void setModifyTime(Date modifyTime) {this.modifyTime = modifyTime;}}