Spring Boot + Mybatis Plus实现登录注册

以下是一个简化的Spring Boot + MyBatis Plus实现登录注册功能的例子。

首先，你需要添加相关依赖到你的pom.xml文件中：

<dependencies>
    <!-- Spring Boot Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- MyBatis Plus Starter -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.x.x</version>
    </dependency>
    <!-- MySQL Connector -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

然后，配置数据库和MyBatis Plus：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/your_database?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: your_username
    password: your_password
mybatis-plus:
  mapper-locations: classpath:/mappers/*.xml
  type-aliases-package: com.yourpackage.model

创建用户实体和Mapper接口：

// User.java
@Data
public class User {
    private Long id;
    private String username;
    private String password;
    // 省略其他字段和getter/setter方法
}
 
// UserMapper.java
@Mapper
public interface UserMapper extends BaseMapper<User> {
    // MyBatis Plus自动生成CRUD操作
}

实现登录和注册接口：

@RestController
public class AuthController {
 
    @Autowired
    private UserMapper userMapper;
 
    @PostMapping("/register")
    public ResponseEntity<?> register(@RequestBody User user) {
        user.setPassword(BCrypt.hashpw(user.getPassword(), BCrypt.gensalt())); // 注册时对密码进行加密
        userMapper.insert(user);
        return ResponseEntity.ok("注册成功");
    }
 
    @PostMapping("/login")
    public ResponseEntity<?> login(@RequestBody User user) {
        User dbUser = userMapper.selectOne(new QueryWrapper<User>().eq("username", user.getUsername()));
        if (dbUser == null) {
            return ResponseEntity.status(HttpStatus.NOT_FOUND).body("用户不存在");
        }
        if (BCrypt.checkpw(user.getPassword(), dbUser.getPassword())) {
            retur