spring 手动提交事务

 public class DAO extends HibernateDaoSupport{

 public void bulkUpdate() {
  Session session=this.getHibernateTemplate().getSessionFactory().openSession();
  Transaction tx= session.beginTransaction();
  tx.begin();
  Query query= session.createQuery("Update Syction s set s.show='T' ");
  query.executeUpdate(); 
  tx.commit();
 }

}