Question

也许这个问题已被分别提出，但我无法找到解决方法。我是Spring的新手，并尝试使用注释将Spring与ssh集成在一个简单的项目中。每当我单击用户表单保存到DB时，它都会抛出此异常：

HTTP状态500 - 请求处理失败;嵌套异常是org.hibernate.HibernateException：如果没有活动事务，saveOrUpdate无效

我做错了什么？我的代码如下：

User.java

Hibernate 4

UsDAOImpl.java

    @Entity
    @Table(name="SpringUsers")

    public class User implements Serializable{
        @Id
        @GeneratedValue(strategy = GenerationType.AUTO)
        @Column(name = "userId")
        private int id;

        @Column(name = "username")
        private String username;


         @Column(name = "password")
         private String password;

        @Column(name = "email")
        private String email;

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getEmail() {
            return email;
        }

        public void setEmail(String email) {
            this.email = email;
        }
    }

用户servlet.xml中

    @Repository


    public class UserDAOImpl implements UserDAO{
        @Autowired
        private SessionFactory sessionFactory;
            public UserDAOImpl(){}

        public UserDAOImpl( SessionFactory sessionFactory){
            this.sessionFactory= sessionFactory;
        }

       @Override
       @Transactional
        public List<User> list() {
           List<User> listUser = sessionFactory.getCurrentSession()
                  .createCriteria(User.class).list();
           return listUser;
        }

        @Override
        @Transactional
        public void saveOrUpdate(User user) {
           sessionFactory.getCurrentSession().saveOrUpdate(user);
        }

        @Override
        @Transactional
        public void delete(int id) {
            User userToDelete = new User();
            userToDelete.setId(id);
            sessionFactory.getCurrentSession().delete(userToDelete);
        }

        @Override
        @Transactional
        public User get(int i) {
            String hql = "from User where id=" + i;
            Query query = sessionFactory.getCurrentSession().createQuery(hql);
            List<User> listUser = (List<User>) query.list();

            if (listUser != null && !listUser.isEmpty()) {
                return listUser.get(0);
            }

            return null;
       }
      }

Answer 1

取消注释此行，它应该有效：

<tx:annotation-driven />

HibernateException：如果没有活动事务，saveOrUpdate无效

1 个答案: