junit4 hibernate4 解决 LazyInitializationException 问题

在编写junit4 测试类时 fetch=FetchType.LAZY 延时加载会报错：
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: ins.xxx.xxx.xx, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:566)
at

解决方案：
在使用 @Before @After控制session

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"/spring/*.xml"})
public class BaseTestTrueRollback {

	@Autowired
	private SessionFactory sessionFactory;
	private Session session;

	@Before
	public void openSession() throws Exception {
		session = sessionFactory.openSession();// SessionFactoryUtils. getSession(sessionFactory,true);
		session.setFlushMode(FlushMode.MANUAL);
		TransactionSynchronizationManager.bindResource(sessionFactory,new SessionHolder(session));
	}

	@After
	public void closeSession() throws Exception {
		TransactionSynchronizationManager.unbindResource(sessionFactory);
		SessionFactoryUtils.closeSession(session);
	}