功能：
点击login , redirect 到hello.jsp 显示 "hello"
点击redirect, redirect 到 error.jsp 显示 "error"
1.创建Struts2 工程
2.web.xml
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <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>
3.index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <s:a action="login">login</s:a><br/> <s:a action="login!redirect.action">redirect</s:a> <!--此处有bug--> </body> </html>
4.LoginAction.java
package com.action; import com.opensymphony.xwork2.ActionSupport; public class LoginAction extends ActionSupport { private static final long serialVersionUID=1L; public String execute() throws Exception{ return SUCCESS; } public String redirect() throws Exception{ return ERROR; } }
5.UserAction.java
package com.action; import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport { private static final long serialVersionUID=1L; public String execute() throws Exception{ return SUCCESS; } }
6.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> <package name="default" extends="struts-default"> <action name="login" class="com.action.LoginAction"> <result type="redirectAction"> <param name="actionName">userLogin</param> <param name="namespace">/user</param> </result> <result name="error" type="redirectAction">error</result> <!--此处的name为LoginAction.redirect传过来的值ERROR--> </action> <action name="error"> <result>/error.jsp</result> </action> </package> <package name="user" extends="struts-default" namespace="/user"> <action name="userLogin" class="com.action.UserAction"> <result> /hello.jsp </result> </action> </package> </struts>
7.error.jsp & hello.jsp
<body> <center> <h2>error</h2> </center> </body> <body> <center> <h2>hello</h2> </center> </body>