spring hibernate 4在单次事务中删除和添加数据到mysql数据库

// 实体类
@Entity
@Table(name = "my_table")
public class MyEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    // 其他属性和方法
}

// DAO类
@Repository
@Transactional
public class MyDao {
    @Autowired
    private SessionFactory sessionFactory;

    public void deleteAndAddData() {
        Session session = sessionFactory.getCurrentSession();
        
        // 删除数据
        Query deleteQuery = session.createQuery("DELETE FROM MyEntity");
        deleteQuery.executeUpdate();
        
        // 添加数据
        MyEntity entity = new MyEntity();
        entity.setName("Example");
        session.save(entity);
    }
}

// 业务逻辑类
@Service
public class MyService {
    @Autowired
    private MyDao myDao;

    public void deleteAndAddData() {
        myDao.deleteAndAddData();
    }
}

// 控制器类
@Controller
public class MyController {
    @Autowired
    private MyService myService;

    @RequestMapping("/deleteAndAddData")
    public String deleteAndAddData() {
        myService.deleteAndAddData();
        return "success";
    }
}