Hibernate事务复制问题

我想更新数据库中的一些表,并希望所有这些工作在一个事务中完成, 当我使用相同的buildingname和branch_fk插入和输入时出现了问题(因为我在这个表上有这个约束(uniqueConstraints={@UniqueConstraint(columnNames={“buildingname”,“branch_fk”}))),但是当我不使用hibernate会话并且使用正常的JDBC事务时,我没有这些问题。

List<Integer> allBranchBuilding = branchBuildingDao.getAllBranchBuildingID(pkId, sess);
            for (Integer integer : allBranchBuilding) {
                branchBuildingDao.delete(integer, sess); // delete kardane tamame BranchBuilding ha va tel haie aanha
            }

            Address myAdr = new Address();
            setAddress(myAdr, centralFlag, city, latit, longit, mainstreet, remainAdr, state);
            BranchBuildingEntity bbe = new BranchBuildingEntity();
            setBranchBuildingEntity(bbe, be, myAdr, city, centralFlag, latit, longit, mainstreet, buildingName, remainAdr, state, des);
            branchBuildingDao.save(bbe, sess);//Exception Occurred                

我在第一种方法中获得我的会话:

        Session sess = null;
        sess = HibernateUtil.getSession();
        Transaction tx = sess.beginTransaction();