public void deleteUser(User user){

         Session session = null;

         Transaction transaction = null;

         try {

             session = HibernateUtils.getSession();

             transaction = session.beginTransaction();

             session.delete(user);

             transaction.commit();

         }finally {

             if (null != session){

                 session.close();

             }

         }

     }

     public void deleteUserHQL(User user){

         Session session = null;

         Transaction transaction = null;

         try {

             session = HibernateUtils.getSession();

             transaction = session.beginTransaction();

             String hql = " DELETE FROM User WHERE id = :id ";

             Query query = session.createQuery(hql);

             query.setInteger("id",user.getId());

             query.executeUpdate();

             transaction.commit();

         }finally {

             if (session != null){

                 session.cancelQuery();

             }

         }

     }