@Data
public class User {
  private Long id;
  private String name;
  private Integer age;
  private String email;

  @TableField(fill = FieldFill.INSERT)
  private Date createTime;
  @TableField(fill = FieldFill.INSERT_UPDATE)
  private Date updateTime;
}

//需要將自定義填充控制器注冊為組件

@Component
public class MyMetaObjectHandler implements MetaObjectHandler {

  private static final Logger LOGGER= LoggerFactory.getLogger(MyMetaObjectHandler.class);

  //insert操作時要填充的字段
  @Override
  public void insertFill(MetaObject metaObject) {
    LOGGER.info("start insert fill ...");
    //根據(jù)屬性名字設置要填充的值
    this.setFieldValByName("createTime",new Date(),metaObject);
    this.setFieldValByName("updateTime",new Date(),metaObject);
  }

  //update操作時要填充的字段
  @Override
  public void updateFill(MetaObject metaObject) {
    LOGGER.info("start insert fill ...");
    this.setFieldValByName("updateTime",new Date(),metaObject);
  }
}

@RunWith(SpringRunner.class)
@SpringBootTest
public class CRUDTest {
  @Autowired
  private UserMapper userMapper;

  @Test
  public void testInsert(){
    User user = new User();
    user.setName("jack11");
    user.setAge(20);
    user.setEmail("4849111@qq.com");

    int result= userMapper.insert(user);
    System.out.println(result);
    System.out.println(user);
  } 
}

@Test
public void testUpdate(){
  User user = new User();
  user.setId(2L);
  user.setName("Jackie");
  int result = userMapper.updateById(user);
  System.out.println(result);
}