Java @由于';org.hibernate.hibernateeexception:未找到当前线程的会话';例外
因此,我了解到放置@Transactional注释的最佳位置是在包含db访问方法的DAO类之外,就像在使用这些方法的服务类中一样 现在,问题是,一旦我已经从DAO类中删除了这个注释,我就启动了DAO测试方法,并引发了前面提到的异常。我将注释放回DAO类中,这个异常不再出现 然后我的问题是:如何清除DAO中的这些注释,并且仍然让测试正常工作 让我们添加一些代码: DAO类Java @由于';org.hibernate.hibernateeexception:未找到当前线程的会话';例外,java,spring,hibernate,transactions,Java,Spring,Hibernate,Transactions,因此,我了解到放置@Transactional注释的最佳位置是在包含db访问方法的DAO类之外,就像在使用这些方法的服务类中一样 现在,问题是,一旦我已经从DAO类中删除了这个注释,我就启动了DAO测试方法,并引发了前面提到的异常。我将注释放回DAO类中,这个异常不再出现 然后我的问题是:如何清除DAO中的这些注释,并且仍然让测试正常工作 让我们添加一些代码: DAO类 public class UserDAO extends IDAO implements IUserDAO {
public class UserDAO extends IDAO implements IUserDAO {
@Override
//@Transactional(readOnly=true)
public User get(int idUser) {
return (User) currentSession().get(User.class,idUser);
}}
public abstract class IDAO {
protected SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session currentSession()
{
return sessionFactory.getCurrentSession();
}
}
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:META-INF/spring/app-context.xml" })
public class UserDAOTest extends AbstractJUnit4SpringContextTests {
@Autowired
private IUserDAO userDAO;
@Test
public void testGetUser() throws Exception {
User user = userDAO.get(2);
assertNotNull(user);
}
}
IDAO类
public class UserDAO extends IDAO implements IUserDAO {
@Override
//@Transactional(readOnly=true)
public User get(int idUser) {
return (User) currentSession().get(User.class,idUser);
}}
public abstract class IDAO {
protected SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session currentSession()
{
return sessionFactory.getCurrentSession();
}
}
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:META-INF/spring/app-context.xml" })
public class UserDAOTest extends AbstractJUnit4SpringContextTests {
@Autowired
private IUserDAO userDAO;
@Test
public void testGetUser() throws Exception {
User user = userDAO.get(2);
assertNotNull(user);
}
}
测试类
public class UserDAO extends IDAO implements IUserDAO {
@Override
//@Transactional(readOnly=true)
public User get(int idUser) {
return (User) currentSession().get(User.class,idUser);
}}
public abstract class IDAO {
protected SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session currentSession()
{
return sessionFactory.getCurrentSession();
}
}
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:META-INF/spring/app-context.xml" })
public class UserDAOTest extends AbstractJUnit4SpringContextTests {
@Autowired
private IUserDAO userDAO;
@Test
public void testGetUser() throws Exception {
User user = userDAO.get(2);
assertNotNull(user);
}
}
应用程序配置
com.wal.serverside.persistence.domain.User
org.hibernate.dialogue.mysql5dialogue
更新
尝试不仅在测试类中添加@Transactional注释,而且在@TransactionConfiguration(transactionManager=“transactionManager”,defaultRollback=false)中添加。在这里,您可以显式设置在xml中定义的事务管理器的名称
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:META-INF/spring/app-context.xml" })
@TransactionConfiguration(transactionManager="transactionManager", defaultRollback=false)
@Transactional(propagation=Propagation.REQUIRED, rollbackFor={Exception.class})
public class UserDAOTest {
...
}
此外,如果您在测试方法中显式创建应用程序上下文,然后从中获取bean,则事务将不起作用:
ApplicationContext appContext = new ClassPathXmlApplicationContext(...);
SomeDAO someDAO = (SomeDAO) appContext.getBean(...);
吸入它的装置
但我看这不是你的情况 天哪,我能有多蠢 我的测试类不是从AbstractTransactionalJUnit4SpringContextTests扩展而来的,因此在我的测试中既没有事务也没有会话 这解决了所有问题:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:META-INF/spring/app-context.xml" })
@TransactionConfiguration(transactionManager="transactionManager", defaultRollback=false)
@Transactional
public class UserDAOTest extends AbstractTransactionalJUnit4SpringContextTests {
@Autowired
private IUserDAO userDAO;
public void setUserDAO(IUserDAO userDAO) {
this.userDAO = userDAO;
}
@Test
public void testGetUser() throws Exception {
User user = userDAO.get(2);
assertNotNull(user);
}
}
你试过在测试函数上添加@Transactional注释吗?是的,但没有起作用:(谢谢Hanks,但这似乎不能解决问题,因为我遇到了同样的异常。是的,我不需要手动获取我的UserDAO,因为@Autowired为我做了这件事:)实际上,在我的项目中,我没有使用AbstractTransactionalJUnit4SpringContextTests,一切都很好。我认为问题在于您从AbstractJUnit4SpringContextTests扩展了类。因此,如果您不扩展任何类,所有的类都应该可以工作。我从来没有使用过AbstractTransactionalJUnit4SpringContextTests。只需使用\@RunWith、\@ContextConfiguration和\@Transactional注释即可。如果事务管理器具有bean名称“transactionManager”,则无需显式调用它。