@Table(tableName = "b_user", primaryKey = "id")public class User {    private Integer id;    @UpdateName    private String userName;    private Integer age;    ...}

@Mapperpublic interface UserDao extends BaseDao<User, Integer> {}

// 插入一条数据User user = new User();user.setId(1);user.setUserName("name1");user.setAge(22);userDao.insert(user);System.out.println(userDao.get(1));// 修改数据User user2 = userDao.get(1);user2.setUserName("newName");user2.setAge(11);// 只会更新包含@UpdateName注解的字段. 所以只会修改userName属性,不会修改age属性userDao.updateByAnnotation(user2, User.UpdateName.class);System.out.println(userDao.get(1));// 删除数据userDao.delete(1);