代码 现有一个用户信息管理网站，项目名称xmvc01，需要完成登录和用户内容展示两个功能。 1.登录功能:根据输入数据和数据库user表的数据进行比较，登录成功显示用户列表，登录失败返回登录页面2.用户列表:用户登录成功，以表格的形式显示user表所有数据信息。用户没有登录，将返回录页面现有项目结构如下内容:仅限院校复习接课使用经允洋请勿 仅限院 授课信描述 com.neu.pojo.User 对应数据表user的javaBean comneu.controller.LoginController用于用户登录功能 是否完成 是 否 用于用户列表显示访问路径(/users)否comneu.controller.UserController com.neudao.UserMapper 用户持久层接口月 com/neu/mapper/UserMapper.xmlmybatis配置文件 4

以下是可能的代码实现，仅供参考：

User.java

package com.neu.pojo;

public class User {
    private Integer id;
    private String username;
    private String password;

    // 省略getter和setter方法

    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    }
}

LoginController.java

package com.neu.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.neu.pojo.User;
import com.neu.service.UserService;

@Controller
public class LoginController {
    @Autowired
    private UserService userService;

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String showLoginForm() {
        return "loginForm";
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String login(String username, String password, Model model) {
        User user = userService.findUserByUsernameAndPassword(username, password);
        if (user != null) {
            model.addAttribute("users", userService.findAllUsers());
            return "userList";
        } else {
            model.addAttribute("error", "用户名或密码错误");
            return "loginForm";
        }
    }
}

UserController.java

package com.neu.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.neu.service.UserService;

@Controller
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping(value = "/users", method = RequestMethod.GET)
    public String showUserList(Model model) {
        model.addAttribute("users", userService.findAllUsers());
        return "userList";
    }
}

UserService.java

package com.neu.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.neu.dao.UserMapper;
import com.neu.pojo.User;

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;

    public User findUserByUsernameAndPassword(String username, String password) {
        return userMapper.findUserByUsernameAndPassword(username, password);
    }

    public List<User> findAllUsers() {
        return userMapper.findAllUsers();
    }
}

UserMapper.java

package com.neu.dao;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.neu.pojo.User;

public interface UserMapper {
    User findUserByUsernameAndPassword(@Param("username") String username, @Param("password") String password);

    List<User> findAllUsers();
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.neu.dao.UserMapper">
    <resultMap type="com.neu.pojo.User" id="userResultMap">
        <id column="id" property="id" />
        <result column="username" property="username" />
        <result column="password" property="password" />
    </resultMap>

    <select id="findUserByUsernameAndPassword" resultMap="userResultMap">
        select * from user where username=#{username} and password=#{password}
    </select>

    <select id="findAllUsers" resultMap="userResultMap">
        select * from user
    </select>
</mapper>

loginForm.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
    <h1>用户登录</h1>

    <form action="${pageContext.request.contextPath}/login" method="post">
        <p>
            <label>用户名：</label> <input type="text" name="username" required>
        </p>
        <p>
            <label>密码：</label> <input type="password" name="password" required>
        </p>
        <p>
            <button type="submit">登录</button>
        </p>
        <p style="color: red">${error}</p>
    </form>
</body>
</html>

userList.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户列表</title>
</head>
<body>
    <h1>用户列表</h1>

    <table border="1">
        <thead>
            <tr>
                <th>ID</th>
                <th>用户名</th>
                <th>密码</th>
            </tr>
        </thead>
        <tbody>
            <c:forEach var="user" items="${users}">
                <tr>
                    <td>${user.id}</td>
                    <td>${user.username}</td>
                    <td>${user.password}</td>
                </tr>
            </c:forEach>
        </tbody>
    </table>
</body>
</html>

以上代码可能有些细节需要根据您的实际情况进行修改，希望能给您提供一些帮助。