model重复属性优化

1.定义父类pojo

@Data
public abstract class BasePojo implements Serializable {

    @TableField(fill = FieldFill.INSERT) //自动填充
    private Date created;
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updated;

}

2.子类pojo继承父类pojo

@Data
@AllArgsConstructor  //满参构造方法
@NoArgsConstructor   //无参构造方法
public class User extends BasePojo {

    private Long id;
    private String mobile;
    private String password;
}

3.自定义拦截器

@Component
public class MyMetaObjectHandler implements MetaObjectHandler {

    @Override
    public void insertFill(MetaObject metaObject) {
        Object created = getFieldValByName("created", metaObject);
        if (null == created) {
            //字段为空，可以进行填充
            setFieldValByName("created", new Date(), metaObject);
        }

        Object updated = getFieldValByName("updated", metaObject);
        if (null == updated) {
            //字段为空，可以进行填充
            setFieldValByName("updated", new Date(), metaObject);
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        //更新数据时，直接更新字段
        setFieldValByName("updated", new Date(), metaObject);
    }
}