详解Mybatis是如何把数据库数据封装到对象中的

@Data
@ApiModel("用户账号")
public class User {

  @ApiModelProperty(value = "用户id")
  Integer id;

  @ApiModelProperty(value = "密码")
  String password;

  @ApiModelProperty(value = "用户名")
  String name;

  @ApiModelProperty(value = "状态")
  Integer type;

  public void setType(Integer type) {
    if (type == null) {
      this.type = 0;
    } else {
      this.type = type;
    }
    System.out.println("id为"+this.id+"的type = " + this.type);
  }


  public void setName(String name) {
    this.name = name;
    System.out.println("id为"+this.id+"的name = " + this.name);
  }
}

@RestController
@RequestMapping("/user")
@Api(tags = "UserController", description = "用户管理")
public class UserController {

  @Autowired
  private UserDao userDao;

  @GetMapping("/getUser/{id}")
  @ApiOperation("获取用户账号")
  public User getUser(@PathVariable @ApiParam("用户id") Integer id) {
    return userDao.selectOne(id);
  }

  @PostMapping("/setUser")
  @ApiOperation("添加用户账号")
  public void setUser(@RequestBody User user) {
    userDao.insert(user);
  }
}

public interface UserDao{

  @Select("select * from user where id=#{id}")
  User selectOne(Integer id);

  @Insert("insert into user values(null,#{name},#{password},#{type})")
  void insert(User user);
}