插入一条记录 打印出记录的ID 返回对象的ID 是0

    public void createOrder(Bj_order ord,Integer addrId ,List<Order_item> ordItem){
        try{
            User_address uAddress = dao.fetch(User_address.class, addrId);
            ord.setConsignee(uAddress.getName());
            ord.setPhone(uAddress.getPhone());
            ord.setAddress(uAddress.getAddress_detail());
            Integer postal_code = uAddress.getPostal_code();
            ord.setZip_code(postal_code.toString());

            ord = dao.insert(ord);
            System.out.print(ord.getOrder_id());
        }catch (Exception e){
            System.out.print(e);
        }
    }