Java进阶知识19 Struts2和Spring整合在一起

1、概述

1、Spring负责对象创建
  2、Struts2负责用Action处理请求
  3、整合的关键点：让Struts2框架Action对象的创建交给Spring完成。

2、整合实例

需要用到的 jar包

　　　　   Spring的配置文件（aaa-bbb.xml）建议分层，方便维护。

配置web.xml文件

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="2.5"
     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_2_5.xsd">
   <display-name></display-name>
   <welcome-file-list>
     <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>

     <!-- Spring 监听器 -->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>/WEB-INF/classes/beans-*.xml</param-value>
     </context-param>
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>

     <!-- Struts 过滤器 -->
     <filter>
         <filter-name>struts2</filter-name>
         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
     </filter>
     <filter-mapping>
         <filter-name>struts2</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
 </web-app>

DAO层

 //接口
 public interface IUserDao {
     public String getByName();
 }

 //实现
 public class UserDaoImpl implements IUserDao {

     public String getByName() {
         return "DSHORE";
     }
 }

Service层

 //接口
 public interface IUserService {
     public String getByName();
 }

 //实现
 public class UserServiceImpl implements IUserService {

     //注入值，如果没有使用spring框架，则此处需要new对象，否则拿不到值。
     private IUserDao userDao;// = new UserDaoImpl();

     public String getByName() {
         return userDao.getByName();
     }

     public IUserDao getUserDao() {
         return userDao;
     }
     public void setUserDao(IUserDao userDao) {
         this.userDao = userDao;
     }
 }

Action层

 package com.shore.action;

 import com.opensymphony.xwork2.ActionSupport;
 import com.shore.service.IUserService;

 /**
  * @author DSHORE/2019-10-26
  *
  */
 public class UserAction extends ActionSupport {
     private static final long serialVersionUID = -8197510116737054459L;

     //注入值，如果没有使用spring框架，则此处需要new对象，否则拿不到值。
     private IUserService userService;// = new UserServiceImpl();

     public String login() {
         System.out.println("用户名：" + userService.getByName());
         return SUCCESS;
     }

     public IUserService getUserService() {
         return userService;
     }

     public void setUserService(IUserService userService) {
         this.userService = userService;
     }
 }

struts.xml 配置文件      注意：struts.xml 中 action name 和 bean-action.xml 中的 bean id 名称，一定要保持一致！！！

 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE struts PUBLIC
     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>
     <!-- true支持动态方法调用 -->
     <constant name="struts.enable.DynamicMethodInvocation" value="true" />
     <constant name="struts.devMode" value="true" /> <!-- true -->

     <package name="front" namespace="/front" extends="struts-default">
         <action name="userAction" class="com.shore.action.UserAction">
             <result name="success">/success.jsp</result>
         </action>
     </package>
 </struts>

beans-dao.xml 配置文件

 <?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:tx="http://www.springframework.org/schema/tx"
        xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

        <bean id="userDao" class="com.shore.dao.impl.UserDaoImpl"></bean>
 </beans>

beans-service.xml 配置文件

 <?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:tx="http://www.springframework.org/schema/tx"
        xmlns:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

        <bean id="userService" class="com.shore.service.impl.UserServiceImpl" p:userDao-ref="userDao"></bean>
 </beans>

beans-action.xml 配置文件

 <?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:tx="http://www.springframework.org/schema/tx"
        xmlns:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

        <!-- scope="prototype"：多例。默认是单例（不用写即是默认） -->
        <bean id="userAction" class="com.shore.action.UserAction" scope="prototype" p:userService-ref="userService"></bean>
 </beans>

index.jsp 页面

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%@taglib uri="/struts-tags" prefix="s"%>
 <%
 String path = request.getContextPath();
 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->
   </head>

   <body>
     <s:form action="userAction!login" method="post" namespace="/front">
         <s:textfield name="name" label="用户名"></s:textfield>
         <s:password name="password" label="密码"></s:password>
         <s:submit value="登录"></s:submit>
     </s:form>
   </body>
 </html>

success.jsp 页面

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%
 String path = request.getContextPath();
 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>
     <base href="<%=basePath%>">

     <title>My JSP 'success.jsp' starting page</title>

     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->

   </head>

   <body>
        登录成功！
   </body>
 </html>

测试结果图：

原创作者：DSHORE

作者主页：http://www.cnblogs.com/dshore123/

原文出自：https://www.cnblogs.com/dshore123/p/11745460.html

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