spring boot mybatis plus 使用

依赖

记得吧原来mybati去掉

 <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>mybatis-plus-boot-starterartifactId>
            <version>3.2.0version>
        dependency>

设置

关闭驼峰命名，不然出现字段名称字段加下划线的情况

mybatis-plus.configuration.map-underscore-to-camel-case=false 

创建数据库数据体

下面的示例，字段名称与数据库表的名称保持一致

@TableName(value = "users")
public class User {
    @TableId(value = "id", type = IdType.AUTO)
    public int id;
    public String userId;
    public String userName;
    public int userType;
    public String photo;
}

创建mapper

@Mapper
public interface UserMapper extends BaseMapper<User> {

}

服务中使用

@Service
public class UserServiceImpl implements IUserService {
    @Resource
    private UserMapper userMapper;
    @Override
    public List<User> getAllUser() {
        return userMapper.selectList(new QueryWrapper<>());
    }
}

controller调用

@RestController
@RequestMapping("/user")
public class UserController {
    @Resource
    private IUserService userService;
    @GetMapping("/getAllUser")
    public ApiFinalResult getAllUser() {
       return ApiFinalResult.success(userService.getAllUser());
    }
}

测试

查询条件介绍

参考该博客
参考官网