mybatis-plus主键id生成、字段自动填充的实现代码

@Data
public class User {
  @TableId(type = IdType.ID_WORKER)
  private Long id;
  private String name;
  private Integer age;
  private String email;

  @TableField(fill = FieldFill.INSERT)
  private Date createTime;
  @TableField(fill = FieldFill.INSERT_UPDATE) // 新增的时候update也有值
  private Date updateTime;
}

@Data
public class User {
  @TableId(type = IdType.ID_WORKER)
  private Long id;
  private String name;
  private Integer age;
  private String email;

  @TableField(fill = FieldFill.INSERT)    // 新增的时候填充数据
  private Date createTime;
  @TableField(fill = FieldFill.INSERT_UPDATE) // 新增或修改的时候填充数据
  private Date updateTime;
}

@Component //此注解表示 将其交给spring去管理
public class MyMetaObjectHandler implements MetaObjectHandler {
  @Override
  public void insertFill(MetaObject metaObject) {
    this.setFieldValByName("createTime", new Date(), metaObject);
    this.setFieldValByName("updateTime", new Date(), metaObject);
  }

  @Override
  public void updateFill(MetaObject metaObject) {
    this.setFieldValByName("updateTime", new Date(), metaObject);
  }
}

//  新增
  @Test
  void addUser() {
    User user = new User();
    user.setName("老王");
    user.setAge(66);
    user.setEmail("laowang@123.com");
    userMapper.insert(user);
  }

//  修改
  @Test
  void updateUser() {
    User user = new User();
    user.setId(1342322873243996161L);
    user.setName("老王修改后");
    userMapper.updateById(user);

  }