库存不足,抛出异常之后,数据仍然被写进数据库

/**
* @param orderBO :
* @Description: 创建订单
* @return: null
* @Author: 张建 (119855181@qq.com)
* @date: 2020/5/13
*/
@Transactional(propagation = Propagation.REQUIRED)
@Override
public void create(OrderBO orderBO) {
    String userId=orderBO.getUserId();
    String itemSpecIds=orderBO.getItemSpecIds();
    String addressId=orderBO.getAddressId();
    Integer payMethod=orderBO.getPayMethod();
    String leftMsg=orderBO.getLeftMsg();
    Orders orders= new Orders();
    String sid = Sid.nextShort();
    orders.setId(sid);
    orders.setUserId(userId);
   // 包邮费用设置为0
   Integer postAmount = 0;
   orders.setPostAmount(postAmount);
   orders.setPayMethod(payMethod);
   orders.setLeftMsg(leftMsg);
   orders.setIsComment(YesOrNo.NO.type);
   orders.setIsDelete(YesOrNo.NO.type);
   orders.setCreatedTime(new Date());
   orders.setUpdatedTime(new Date());

   //查询地址快照
    UserAddress address=userAddressService.queryAddress(userId,addressId);
    orders.setReceiverName(address.getReceiver());
    orders.setReceiverMobile(address.getMobile());
    orders.setReceiverAddress(address.getProvince()+address.getCity()+address.getDistrict()+address.getDetail());
   //查询商品规格,计算商品总价格和实际支付价格
   String[] splits = itemSpecIds.split(",");
   //TODO 整合redis后,从缓存的购物车里获取购买的商品数量,这里先统一设置为1.
   int number = 1;
   //商品累积金额
   int amount = 0;
   //商品实付金额
   int payAmount=0;
   for(String specId:splits)
   {
       //1.累加商品价格和实际支付金额
       //1.1根据商品规格id查询商品规格
       ItemsSpec itemsSpec = itemsService.querySpecById(specId);
       amount += itemsSpec.getPriceNormal();
       payAmount += itemsSpec.getPriceDiscount();
       //2.根据商品id获取商品信息和主图
       String itemId = itemsSpec.getItemId();
       Items item = itemsService.queryItemById(itemId);
       String itemsMainImg=itemsService.queryItemMainImgById(itemId);
       //3.循环保存子订单到数据库
       String subOrderId = Sid.nextShort();
       OrderItems subOrderItems = new OrderItems();
       subOrderItems.setId(subOrderId);
       subOrderItems.setOrderId(sid);
       subOrderItems.setItemId(itemId);
       subOrderItems.setItemImg(itemsMainImg);
       subOrderItems.setItemName(item.getItemName());
       subOrderItems.setItemSpecId(specId);
       subOrderItems.setItemSpecName(itemsSpec.getName());
       subOrderItems.setPrice(itemsSpec.getPriceDiscount());
       subOrderItems.setBuyCounts(number);
       int i = orderItemsMapper.insert(subOrderItems);
       // 2.4 在用户提交订单以后，规格表中需要扣除库存
       itemsService.decreaseStock(specId,number);

   }
    orders.setTotalAmount(amount);
    orders.setRealPayAmount(payAmount);
   ordersMapper.insert(orders);
    //保存订单状态
   OrderStatus orderStatus = new OrderStatus();
   orderStatus.setOrderId(sid);
   orderStatus.setOrderStatus(OrderStatusEnum.WAIT_PAY.type);
   orderStatus.setCreatedTime(new Date());
   orderStatusMapper.insert(orderStatus);
}