Spring整合Struts2

Spring整合struts2的步骤: 
   1.导包 
   2.配置web.xml 
   3.配置applicationContext.xml 
   4.创建并声明DAO 
   5.创建并声明Action 
   6.配置Action 
   7.创建JSP
案例:使用Spring整合Struts2,并实现Struts2的HelloWorld案例
步骤:
    实现此案例按如下步骤进行:

步骤一:导包
所需环境:struts2.5+spring4.0+tomcat7.0
所需如下:

     https://files.cnblogs.com/files/demon09/struts.rar
     https://files.cnblogs.com/files/demon09/spring4.0.rar


步骤二:配置web.xml 在web.xml中配置一个listener,用于tomcat启动时自动加载Spring,在配置出Struts2的前端控制器, 代码如下:

<?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"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">
	<display-name>SpringStruts2</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- 配置listener,在容器启动的时候自动加载Spring -->
	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>
	<!-- 配置Struts2前端控制器 -->
	<filter>
		<filter-name>Struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>Struts</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

</web-app>
步骤三:配置applicationContext.xml
    引入Spring配置文件,放在src根路径下,在该文件下开启组件扫描,代码如下所示:
<?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" 
	xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
	xmlns:jee="http://www.springframework.org/schema/jee" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop" 
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:util="http://www.springframework.org/schema/util"
	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
	xsi:schemaLocation="
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
		http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
		
	<!-- 开启注解扫描  -->
	<context:component-scan base-package="com.whread" />
	
</beans>
步骤四:创建并声明DAO
    创建包com.whread.dao,并在包下创建一个类HelloDao,在这个类中写一个say方法,其返回值为字符串,返回一句话即可, 另外要使用Spring注解声明这个DAO组件,将其纳入到Spring容器中,代码如下所示:
package com.whread.dao;

import org.springframework.stereotype.Repository;

@Repository
public class HelloDao {
	
	public String say(){
		return "Hello,Spring整合Struts2";
	}
}  
步骤五:创建并声明Action
    创建包com.whread.action,并在包下创建HelloAction,在这个Action业务的方法中,调用HelloDao返回一句话,并通过输出属性输出给页面.需要使用Spring注解声明这个Action组件,将其纳入到Spring容器中,另外也需要通过注解将DAO注入进来.代码示例如下:
package com.whread.action;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;

import com.tarena.dao.HelloDao;

@Controller
public class HelloAction {

	@Resource
	private HelloDao dao;
	
	private String msg;
	
	public String execute(){
		//通过dao获取输出消息
		msg = dao.say();
		System.out.println("msg="+msg);
		return "success";
	}

	public String getMsg() {
		return msg;
	}

	public void setMsg(String msg) {
		this.msg = msg;
	}
	
	
}
步骤六:配置Action
    在struts.xml中配置Action(struts.xml放置于src根目录下即可),由于是用Spring管理Action,在action元素中通过class属性指定Action类型的时候,需要指定的是组件的ID,代码示例如下:
<?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配置说明:
		name属性:名字,值随意
		namespace属性:命名空间,用于对应请求的URL中的path,即/main,注意,必须使用/作为前缀
		extends属性:固定取值为struts-default -->
	<package name="demo" namespace="/demo" extends="struts-default">
		<!-- http://localhost:8080/SpringStruts2/demo/hello.action -->
<!-- action配置说明:
		name属性:名字,值为请求的资源名称,不包含 .action部分
		class属性(可写包.类名):接收并处理请求的java类的包名与类名
		method属性(可选):接收并处理请求的的java类的方法名  -->
		<action name="hello" class="helloAction">
			<result name="success">
				/hello.jsp
			</result>
		</action>
	</package>
</struts>
步骤七:创建JSP页面
    在WEB-INF下创建hello.jsp,并在这个页面上输出HelloAction中的输出属性,代码示例如下:
<%@page pageEncoding="utf-8" isELIgnored="false"%>
<%@taglib uri="/struts-tags" prefix="s" %>
<html>
<head>
</head>
<body>
<h1>
	<s:property value="msg" />
</h1>
</body>
</html>
步骤八:测试
    部署项目,并启动tomcat,访问http://localhost:8080/SpringStruts2/demo/hello.action,成功出现Hello,Spring整合Struts2即表示成功
原文地址:https://www.cnblogs.com/demon09/p/9709732.html