01：导包配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <!-- 01:启动struts2框架 --> <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> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
02：编写action类
package com.self.action; /** * 02：写相应的处理方法 */ public class HelloWorldAction { private String message; public String dohelloworld(){ return "doresult"; } //为属性注入值，需要提供set方法 public void setMessage(String message) { this.message = message; } //在页面显示值，需要get方法 public String getMessage() { return message; } }
03：配置struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- 01：将.action访问，改为.do -->
<constant name="struts.action.extension" value="do"></constant>
<!-- 02：指定默认编码，相当于HttpServletRequest的setCharacterEncoding方法，也作用于freemarker、velocity的输出 -->
<constant name="struts.i18n.encoding" value="UTF-8"></constant>
<include file="department.xml"/>
<include file="employ.xml"/>
</struts>
04：编写department.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="dep" namespace="/department" extends="struts-default">
<action name="helloworld" class="com.self.action.HelloWorldAction" method="dohelloworld" >
<param name="message">department</param>
<result name="doresult">
/showresult.jsp
</result>
</action>
</package>
</struts>
05：编写employ.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="emp" namespace="employ" extends="struts-default">
<action name="helloworld" class="com.self.action.HelloWorldAction" method="dohelloworld" >
<param name="message">employ</param>
<result name="doresult">
/showresult.jsp
</result>
</action>
</package>
</struts>
06：编写页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>显示</title>
</head>
<!-- 第4步：显示 -->
<body>
<BR>
<BR>
<center>
将页面放在WEB-INF下面，这样用户直接访问不到<BR> <BR> 为action的属性注入值: ${message}
<BR>
</center>
</body>
</html>
07：访问路径1<http://localhost:8080/Struts2_01/employ/helloworld.do>
显示结果1：employ
08：访问路径2<http://localhost:8080/Struts2_01/department/helloworld.do>
显示结果2：department