SpringBoot+MyBatis Plus实现用户登录认证

CREATE TABLE `user` (
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '主键',
  `username` VARCHAR(50) NOT NULL UNIQUE COMMENT '用户名',
  `password` VARCHAR(100) NOT NULL COMMENT '密码（建议加密存储）',
  `nickname` VARCHAR(50) DEFAULT NULL COMMENT '昵称',
  `avatar` VARCHAR(255) DEFAULT NULL COMMENT '头像URL',
  `email` VARCHAR(100) DEFAULT NULL COMMENT '邮箱',
  `phone` VARCHAR(20) DEFAULT NULL COMMENT '手机号',
  `status` TINYINT NOT NULL DEFAULT '1' COMMENT '状态：0-禁用，1-启用',
  `create_time` DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `update_time` DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户表';

<dependencies>
    <!-- Spring Boot Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- MyBatis Plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.5.1</version>
    </dependency>

    <!-- MySQL 驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.30</version>
    </dependency>

    <!-- Lombok（可选） -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.24</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/your_database?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    username: root
    password: your_password
    driver-class-name: com.mysql.cj.jdbc.Driver

mybatis-plus:
  mapper-locations: classpath*:mapper/**/*.xml
  configuration:
    mapUnderscoreToCamelCase: true

package com.burns.entity;

import lombok.Data;

@Data
public class User {
    private Long id;
    private String username;
    private String password;
    private String nickname;
    private String avatar;
    private String email;
    private String phone;
    private Integer status;
}

package com.burns.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.burns.entity.User;

public interface UserMapper extends BaseMapper<User> {
}

package com.burns.service;

import com.burns.entity.User;

public interface UserService {
    User login(String username, String password);
}

package com.burns.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.burns.entity.User;
import com.burns.mapper.UserMapper;
import com.burns.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(String username, String password) {
        QueryWrapper<User> wrapper = new QueryWrapper<>();
        wrapper.eq("username", username).eq("password", password);

        return userMapper.selectOne(wrapper);
    }
}

package com.burns.controller;

import com.burns.entity.User;
import com.burns.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class AuthController {

    @Autowired
    private UserService userService;

    @PostMapping("/login")
    public Object login(@RequestParam String username, @RequestParam String password) {
        User user = userService.login(username, password);
        if (user == null) {
            return "登录失败";
        }
        return user;
    }
}

POST http://localhost:8080/login
Body (form-data):
username=admin
password=123456