案例:
用户登录
login.jsp代码:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录页面</title>
</head>
<body>
<form action="${ pageContext.request.contextPath }/login.action" method="post">
<table align="center">
<caption><h3>用户登录</h3></caption>
<tr>
<td>用户名:</td>
<td><input type="text" name="username" /></td>
</tr>
<tr>
<td>密 码:</td>
<td><input type="password" name="password" /></td>
</tr>
<tr align="center">
<td colspan="2"><input type="submit" value="登录" /> <input type="reset" value="重置" /></td>
</tr>
</table>
</form>
</body>
</html>
LoginAction代码:
package com.itheima.action;
import com.itheima.domain.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class LoginAction extends ActionSupport implements ModelDriven<User> {
private static final long serialVersionUID = 6114481653813951691L;
private User user = new User();
@Override
public User getModel() {
return user;
}
public String login() {
if ("tom".equals(user.getUsername()) && "123".equals(user.getPassword())) {
return "success";
} else {
return "fail";
}
}
}
Welcome.jsp代码:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录成功页面</title>
</head>
<body>
<p>Welcome!</p>
</body>
</html>
error.jsp代码:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录失败页面</title>
</head>
<body>
<p>Fail!!!</p>
</body>
</html>
struts.xml配置:
<?xml version="1.0" encoding="UTF-8" ?>
<!-- 指定Struts2配置文件的DTD信息 -->
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<!-- struts是Struts2配置文件的根元素 -->
<struts>
<constant name="struts.devMode" value="true" />
<!-- Struts2的Action必须在指定的包空间下定义 -->
<package name="default" namespace="/" extends="struts-default">
<!-- 定义login的Action,该Action的实现类为 com.itheima.action.LoginAction 类 -->
<action name="login" class="com.itheima.action.LoginAction"
method="login">
<!-- 定义处理结果与资源之间映射关系 -->
<result name="success">/welcome.jsp</result>
<result name="fail">/error.jsp</result>
</action>
</package>
</struts>
web.xml配置:
<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>
时间： 2024-10-13 01:02:57