第一部分：程序结构
第二部分：页面的创建
1、login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
</head>
<body>
<form action="/mvc1/user/chklogin" method="post">
<table>
<tr>
<td>账号：</td>
<td><input name="username" type="text"></td>
</tr>
<tr>
<td>密码：</td>
<td><input name="password" type="password"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="登录"></td>
</tr>
</table>
</form>
${error }
</body>
</html>
2、index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
</head>
<body>
${username }: 欢迎登陆
</body>
</html>
第三部分：编写controller
package cn.shxy.web.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/login_show")
public String login_show() {
return "/login";
}
@RequestMapping("/login")
public String login(String username, String password, HttpServletRequest request) {
if (username.equalsIgnoreCase("aaa") && password.equals("bbb")) {
request.setAttribute("username", username);
return "/index";
}
request.setAttribute("error", "账号或密码有误！");
return "/login";
}
@RequestMapping("/chklogin")
public String chkLogin(User user,HttpServletRequest request){
if(user.getUsername().equals("aaa") && user.getPassword().equals("bbb")){
request.setAttribute("username", user.getUsername());
return "/index";
}
request.setAttribute("error", "账号或密码有误！");
return "/login";
}
}
第四部分：测试
地址栏输入路径：http://localhost:8080/mvc1/user/chklogin
时间： 2024-10-10 14:04:28