hibernate3批量删除记录

public int delete(Long[] delId){
        Session session = getSession();
         Transaction tx = session.beginTransaction();
          String hql = “delete IPInfo  where id  in ( :IPId) ”
        Query query = session.createQuery(hql);
        query.setParameterList("IPId",delId);
        int dels = query.executeUpdate();
        tx.commit();
        return dels;
    }