sql實時提交事務

public void deleteByHbtlidAndDept(String class_id,String depart_id) {
        Session session =  this.getHibernateTemplate().getSessionFactory().openSession();
        Transaction tran = session.beginTransaction(); 
        String sql = " delete DC_EQP_DPT_DEF m  where m.class_id = '"+class_id+"' and m.depart_id = '"+depart_id+"' ";
        session.createSQLQuery(sql).executeUpdate();
        tran.commit(); 
    }

public NaviInfo saveNaviInfo(NaviInfo naviInfo) {
        Session session =  hibernateTemplate.getSessionFactory().openSession();
        Transaction tran = session.beginTransaction(); 
        NaviInfo backEntity =(NaviInfo)session.merge(naviInfo);
        tran.commit(); 
        return backEntity;
    }