杨校老师课堂基于SSM整合之用户登录案例【Eclipse

杨校老师课堂基于SSM整合之用户登录案例【Eclipse - Maven版】2

2024-06-20 28

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简介： 杨校老师课堂基于SSM整合之用户登录案例【Eclipse - Maven版】

杨校老师课堂基于SSM整合之用户登录案例【Eclipse - Maven版】1：https://developer.aliyun.com/article/1543099

5. UserServiceImpl.java

 package cn.javabs.ssm.service.impl;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
 
import cn.javabs.ssm.dao.UserDao;
import cn.javabs.ssm.entity.User;
import cn.javabs.ssm.service.UserService;
 
@Service("userService")
@Transactional
public class UserServiceImpl implements UserService {
 
  @Autowired
  private UserDao userDao;
 
  public User login(String username, String password) {
    System.out.println(username);
 
    User user = this.userDao.userLogin(username, password);
    System.out.println("df");
    System.out.println("ghj" + user);
 
    return user;
  }
 
}

6. UserController

package cn.javabs.ssm.controller;
 
import javax.servlet.http.HttpSession;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PostMapping;
 
import cn.javabs.ssm.entity.User;
import cn.javabs.ssm.service.UserService;
 
@Controller
public class UserController {
 
  @Autowired
  private UserService userService;
 
  @PostMapping("/userLogin.action")
  public String userLogin(HttpSession session, String username, String password, Model model) {
    System.out.println("password = " + password);
    User user = userService.login(username, password);
    System.out.println("user:" + user);
 
    if (user != null) {
      session.setAttribute("USER", user);
      return "user";
    }
    model.addAttribute("msg", "您登陆失败");
    return "message";
  }
}

7.在webapp下创建一个文件夹，命名为admin

分别创建三个网页：login.jsp message.jsp user.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set value="${pageContext.request.contextPath}" var="basePath"  ></c:set>    
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
  <form action="${basePath}/userLogin.action" method="post">
    Account: <input type="text" name="username" /> <br /> 
    
    Password:<input type="text" name="password" /> <br /> 
    
         <input type="submit"  value="登录">
  </form>
</body>
</html>

message.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>提示页面</title>
</head>
<body>
    ${msg}
</body>
</html>

user.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"  pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录成功主页</title>
</head>
<body>
  <h2>${sessionScope.USER.username}，您好。</h2>
</body>
</html>

在webapp再建一个jsp，命名为：index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录入口</title>
</head>
<body>
 
  <jsp:forward page="/admin/login.jsp"></jsp:forward>
 
</body>
</html>