我对休眠有一点问题。
我有一些简单的 DAO
@Repository
public class UserDAOImpl implements UserDAO {
@Autowired
private SessionFactory sessionFactory;
private Session openSession() {
return sessionFactory.getCurrentSession();
}
@Transactional
public User getUser(String login) {
List<User> userList;
Query query = openSession().createQuery("from User u where u.login = :login");
query.setParameter("login", login);
userList = query.list();
if (userList.size() > 0)
return userList.get(0);
else
return null;
}
}
这里是 sessionFactory 的 bean 配置
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
public User getUser(String login)
如果我从我得到的 @Transactional 注释中删除
org.hibernate.HibernateException: No Session found for current thread
org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)
org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:941)
我在哪里?