spring注解事物

org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:63)
org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:687)
com.tc.common.dao.BaseHibernateDao.getSession(BaseHibernateDao.java:67)
com.tc.common.dao.BaseHibernateDao.createCriteria(BaseHibernateDao.java:266)
com.tc.common.dao.BaseHibernateDao.find(BaseHibernateDao.java:248)
com.tc.common.dao.BaseHibernateDao.findBy(BaseHibernateDao.java:143)



出现这种异常是因为service层没加@Transactional所致