struts2(2)---入门示例

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步骤1：新建web project项目Struts2Demo

步骤2：导入struts2所需要的jar包

步骤3：在src下新建struts2核心配置文件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><package name="loginPackage" namespace="/" extends="struts-default"><action name="loginAction" class="com.cn.action.LoginAction" method="login"><result name="loginStr">/WEB-INF/jsp/user/login.jsp</result></action><action name="toLoginAction" class="com.cn.action.LoginAction" method="toLogin"><result name="loginSucc">/WEB-INF/jsp/user/loginSuccess.jsp</result><result name="loginFail">/WEB-INF/jsp/user/loginFailure.jsp</result></action></package></struts>

步骤4：新建包com.cn.vo,并在该包下新建实体类UserVO

package com.cn.vo;public class UserVO {private int id;private String username;private String password;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

步骤5：新建包com.cn.action，并在该包下新建控制器类LoginAction

package com.cn.action;import com.cn.vo.UserVO;public class LoginAction {private UserVO userVO;/** * 登录跳转 * */public String login(){return "loginStr";}/** * 登录处理 * */public String toLogin(){String username=userVO.getUsername()!=null ? userVO.getUsername():"";String password=userVO.getPassword()!=null?userVO.getPassword():"";if("admin".equals(username) && "123456".equals(password)){return "loginSucc";}else{return "loginFail";}}public UserVO getUserVO() {return userVO;}public void setUserVO(UserVO userVO) {this.userVO = userVO;}}

步骤6：在WEB-INF下新建文件夹jsp，然后在jsp文件下新建user文件,然后在user文件下新建三个视图

登录视图：login.jsp

<%@ 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 'login.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>    <form action="toLoginAction.action" method="post">    <table>    <tr>    <td>用户名：</td>    <td>    <input type="text" name="userVO.username" />    </td>    </tr>    <tr>    <td>密  码：</td>    <td>    <input type="password" name="userVO.password" />    </td>    </tr>    <tr>    <td colspan="2">    <input type="submit" value="登录" />    </td>    </tr>    </table>    </form>  </body></html>

登录成功跳转视图：loginSuccess.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><%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 'login.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>    <span>登录成功,欢迎您${userVO.username}</span>  </body></html>

登录失败跳转视图：loginFailure.jsp

<%@ 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 'login.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>     <span>登录失败,错误的用户名${userVO.username}</span><br/>     <a href="loginAction.action">返回</a>  </body></html>

步骤7：在web.xml中配置struts2的核心过滤器Struts

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0" 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_3_0.xsd">  <display-name></display-name>  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list>  <!-- 配置struts2核心过滤器 -->  <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>*.action</url-pattern>  </filter-mapping></web-app>

步骤8：测试

在浏览器地址栏中输入：http://localhost:8080/Struts2Demo/loginAction.action测试

注：上面的struts2配置为最基本的配置，实际开发中struts.xml配置用通配符进行配置

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