Spring整合Struts2

前提

在WEB应用中使用Spring

1. 整合的目标

使IOC容器管理Struts2中的Action

2. 步骤

要求：在web项目中用spring和struts2调用service类中的方法，并跳转到success.jsp中

• 目录结构

  
  图片.png

• 全部jar包

  
  图片.png

• 创建一个module

  
  图片.png

• 正常引入Spring的Jar包

• 创建applicationContext.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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">


</beans>

• 在web.xml中初始化IOC容器

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    
    <!-- 配置Spring配置文件的名称和位置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 启动IOC容器的ContextLoaderListener监听,将IOC容器放入到ServletContext域中 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
</web-app>

• 正常引入Struts2的Jar包

• 创建struts.xml

<?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>


</struts>

• 在web.xml中配置struts2的Filter

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    
    <!-- 配置Spring配置文件的名称和位置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 启动IOC容器的ContextLoaderListener监听,将IOC容器放入到ServletContext域中 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 配置Struts2的Filter -->
    <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>

• 创建pers.action.PersonAction

package pers.action;

import pers.service.PersonService;

public class PersonAction {
    private PersonService personService;

    public void setPersonService(PersonService personService) {
        this.personService = personService;
    }

    public String execute() {
        System.out.println("personAction执行了。。。");
        personService.save();
        return "success";
    }
}

• 创建pers.service.PersonService

package pers.service;

public class PersonService {
    public void save() {
        System.out.println("PersonService中save方法执行了。。。");
    }
}

• 在applicationContext中配置bean(注意：将bean改成多例的)

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


    <bean id="personService" class="pers.service.PersonService">
    </bean>

    <bean id="personAction" class="pers.action.PersonAction" scope="prototype">
        <property name="personService" ref="personService"></property>
    </bean>
</beans>

• 配置Struts2配置文件
  注意（整合的关键）：<action>中的class属性不再自己创建对象，而是用IOC容器提供该Action的对象（指向spring配置文件的Bean的id）

<?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>

    <package name="helloWorld" extends="struts-default" namespace="/">
        <action name="aaa" class="personAction">
            <result>success.jsp</result>
        </action>
    </package>

</struts>

• 创建index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>
  <a href="aaa.action">Test</a>
  </body>
</html>

• 创建success.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>success</title>
</head>
<body>
成功了。。。
</body>
</html>

• 运行结果

图片.png 图片.png 运行结果

• 需要导入Struts2支持Spring的jar包 struts2-spring-plugin.jar （指明Struts2先在IOC容器中获取Action实例）

注意

struts2-spring-plugin.jar的版本不能超过struts2-core.jar，否则报错（最好两个版本一样）
配置文件放到src的直接目录下