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Spring与Struts1整合方式之通过Spring的DelegatingActionProxy类

  Spring提供了DelegatingActionProxy类,用来代理Struts中的Action,负责在Spring配置文档中查找对应的Action映射,从而把Struts的Action与Spring分离开,并把Struts的动作置于Spring框架的控制之下。

  1.创建web工程,将需要的资源包导入工程的WEB-INF/lib下,所需要的资源包包括:commons-beanutils- 1.8.0.jar、commons-chain-1.2.jar、commons-digester-1.8.jar、commons- logging-1.0.4.jar、log4j-1.2.14.jar、spring.jar、struts-core-1.3.10.jar、 struts-extras-1.3.10.jar。

  2.配置web.xml,采用struts1分配请求连接,配置如下:

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0"    xmlns="http://java.sun.com/xml/ns/javaee"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">    <!-- 定义Struts1请求处理对象 -->    <servlet>        <servlet-name>actionServlet</servlet-name>        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>                 <!-- 初始化配置文档 -->        <init-param>            <param-name>config</param-name>            <param-value>struts.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <!-- 分配请求,将匹配*.do的请求交给actionServlet处理 -->    <servlet-mapping>        <servlet-name>actionServlet</servlet-name>        <url-pattern>*.do</url-pattern>    </servlet-mapping>         <display-name></display-name>      <welcome-file-list>        <welcome-file>index.jsp</welcome-file>    </welcome-file-list></web-app>
web.xml

  3.在classpath中导入struts.xml配置文件,文件内容如下:

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration1.2//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd"><struts-config>    <form-beans>        <form-bean name="helloWorld" type="com.luxl.action.HelloWorld"></form-bean>    </form-beans>        <!-- 配置请求连接 -->    <action-mappings>        <action path="/helloWorld" type="org.springframework.web.struts.DelegatingActionProxy" name="helloWorld">            <forward name="show" path="/JSP/index.jsp"/>        </action>        <!-- 请求的URL对应于<action>中的path属性 -->        <action path="/newHelloWorld"                type="org.apache.struts.actions.ForwardAction"                parameter="/JSP/newHelloWorld.jsp" />    </action-mappings>        <!-- 注册ContextLoaderPlugIn插件 -->    <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">        <set-property property="contextConfigLocation" value="http://www.mamicode.com/WEB-INF/spring.xml"></set-property>    </plug-in></struts-config>
struts.xml

  4.在WEB-INF/lib下导入spring.xml配置文件,文件内容如下:

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans>    <bean id="helloWorldService" class="com.luxl.service.impl.HelloWorldServiceImpl">    </bean>        <!-- 定义对应于struts.xml中的action的bean,name与action的path对应 -->    <bean name="/helloWorld" class="com.luxl.action.HelloWorldAction">        <property name="service">            <ref bean="helloWorldService" />        </property>    </bean></beans>
spring.xml

  5.定义Struts的Action类时,使其继承Struts的Action类,实例Action类如下:

package com.luxl.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.log4j.Level;import org.apache.log4j.Logger;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import com.luxl.service.HelloWorldService;public class HelloWorldAction extends Action{    private Logger logger = Logger.getLogger(this.getClass());        private HelloWorldService service;        public HelloWorldService getService() {        return service;    }    public void setService(HelloWorldService service) {        this.service = service;    }    @Override    public ActionForward execute(ActionMapping mapping, ActionForm form,            HttpServletRequest request, HttpServletResponse response)            throws Exception {        // TODO Auto-generated method stub        //通过ApplicationContext获取配置文件        logger.log(Level.INFO, "receive request");        String msg = service.addMsg((HelloWorld)form);        request.setAttribute("helloWorld", msg);        return mapping.findForward("show");    }}
HelloWorldAction.java


注:DelegatingActionProxy类比DelegatingRequestProcessor的优势在于,它代理的是Action,而不是RequestProcessor,即使用户自定义了RequestProcessor也无所谓。

Spring与Struts1整合方式之通过Spring的DelegatingActionProxy类