Redis 购物车 - 删除商品与更新购买数量

@ApiOperation(value = "从购物车中删除商品", notes = "从购物车中删除商品", httpMethod = "POST")
@PostMapping("/del")
public JSONResult del(@RequestParam String userId,@RequestParam String itemSpecId,HttpServletRequest request,HttpServletResponse response
) {if (StringUtils.isBlank(userId) || StringUtils.isBlank(itemSpecId)) {return JSONResult.errorMsg("参数不能为空");}// 用户在页面删除购物车中的商品数据，如果此时用户已经登录，则需要同步删除redis购物车中的商品String shopcartJson = redisOperator.get(FOODIE_SHOPCART + ":" + userId);if (StringUtils.isNotBlank(shopcartJson)) {// redis中已经有购物车了List<ShopcartBO> shopcartList = JsonUtils.jsonToList(shopcartJson, ShopcartBO.class);// 判断购物车中是否存在已有商品，如果有的话则删除for (ShopcartBO sc: shopcartList) {String tmpSpecId = sc.getSpecId();if (tmpSpecId.equals(itemSpecId)) {shopcartList.remove(sc);break;}}// 覆盖现有redis中的购物车redisOperator.set(FOODIE_SHOPCART + ":" + userId, JsonUtils.objectToJson(shopcartList));}return JSONResult.ok();
}

@ApiOperation(value = "用户下单", notes = "用户下单", httpMethod = "POST")
@PostMapping("/create")
public JSONResult create(@RequestBody SubmitOrderBO submitOrderBO,HttpServletRequest request,HttpServletResponse response) {if (submitOrderBO.getPayMethod() != PayMethod.WEIXIN.type&& submitOrderBO.getPayMethod() != PayMethod.ALIPAY.type ) {return JSONResult.errorMsg("支付方式不支持！");}//        System.out.println(submitOrderBO.toString());String shopcartJson = redisOperator.get(FOODIE_SHOPCART + ":" + submitOrderBO.getUserId());if (StringUtils.isBlank(shopcartJson)) {return JSONResult.errorMsg("购物数据不正确");}List<ShopcartBO> shopcartList = JsonUtils.jsonToList(shopcartJson, ShopcartBO.class);// 1. 创建订单OrderVO orderVO = orderService.createOrder(shopcartList, submitOrderBO);String orderId = orderVO.getOrderId();// 2. 创建订单以后，移除购物车中已结算（已提交）的商品/*** 1001* 2002 -> 用户购买* 3003 -> 用户购买* 4004*/// 清理覆盖现有的redis汇总的购物数据shopcartList.removeAll(orderVO.getToBeRemovedShopcatdList());redisOperator.set(FOODIE_SHOPCART + ":" + submitOrderBO.getUserId(), JsonUtils.objectToJson(shopcartList));// 整合redis之后，完善购物车中的已结算商品清除，并且同步到前端的cookieCookieUtils.setCookie(request, response, FOODIE_SHOPCART, JsonUtils.objectToJson(shopcartList), true);// 3. 向支付中心发送当前订单，用于保存支付中心的订单数据MerchantOrdersVO merchantOrdersVO = orderVO.getMerchantOrdersVO();merchantOrdersVO.setReturnUrl(payReturnUrl);// 为了方便测试购买，所以所有的支付金额都统一改为1分钱merchantOrdersVO.setAmount(1);HttpHeaders headers = new HttpHeaders();headers.setContentType(MediaType.APPLICATION_JSON);headers.add("UserId","");headers.add("password","");HttpEntity<MerchantOrdersVO> entity =new HttpEntity<>(merchantOrdersVO, headers);ResponseEntity<JSONResult> responseEntity =restTemplate.postForEntity(paymentUrl,entity,JSONResult.class);JSONResult paymentResult = responseEntity.getBody();if (paymentResult.getStatus() != 200) {logger.error("发送错误：{}", paymentResult.getMsg());return JSONResult.errorMsg("支付中心订单创建失败，请联系管理员！");}return JSONResult.ok(orderId);
}

/*** 用于创建订单相关信息* @param submitOrderBO*/
public OrderVO createOrder(List<ShopcartBO> shopcartList, SubmitOrderBO submitOrderBO);

@Transactional(propagation = Propagation.REQUIRED)
@Override
public OrderVO createOrder(List<ShopcartBO> shopcartList, SubmitOrderBO submitOrderBO) {String userId = submitOrderBO.getUserId();String addressId = submitOrderBO.getAddressId();String itemSpecIds = submitOrderBO.getItemSpecIds();Integer payMethod = submitOrderBO.getPayMethod();String leftMsg = submitOrderBO.getLeftMsg();// 包邮费用设置为0Integer postAmount = 0;String orderId = sid.nextShort();UserAddress address = addressService.queryUserAddres(userId, addressId);// 1. 新订单数据保存Orders newOrder = new Orders();newOrder.setId(orderId);newOrder.setUserId(userId);newOrder.setReceiverName(address.getReceiver());newOrder.setReceiverMobile(address.getMobile());newOrder.setReceiverAddress(address.getProvince() + " "+ address.getCity() + " "+ address.getDistrict() + " "+ address.getDetail());//        newOrder.setTotalAmount();
//        newOrder.setRealPayAmount();newOrder.setPostAmount(postAmount);newOrder.setPayMethod(payMethod);newOrder.setLeftMsg(leftMsg);newOrder.setIsComment(YesOrNo.NO.type);newOrder.setIsDelete(YesOrNo.NO.type);newOrder.setCreatedTime(new Date());newOrder.setUpdatedTime(new Date());// 2. 循环根据itemSpecIds保存订单商品信息表String itemSpecIdArr[] = itemSpecIds.split(",");Integer totalAmount = 0;    // 商品原价累计Integer realPayAmount = 0;  // 优惠后的实际支付价格累计List<ShopcartBO> toBeRemovedShopcatdList = new ArrayList<>();for (String itemSpecId : itemSpecIdArr) {ShopcartBO cartItem = getBuyCountsFromShopcart(shopcartList, itemSpecId);// 整合redis后，商品购买的数量重新从redis的购物车中获取int buyCounts = cartItem.getBuyCounts();toBeRemovedShopcatdList.add(cartItem);// 2.1 根据规格id，查询规格的具体信息，主要获取价格ItemsSpec itemSpec = itemService.queryItemSpecById(itemSpecId);totalAmount += itemSpec.getPriceNormal() * buyCounts;realPayAmount += itemSpec.getPriceDiscount() * buyCounts;// 2.2 根据商品id，获得商品信息以及商品图片String itemId = itemSpec.getItemId();Items item = itemService.queryItemById(itemId);String imgUrl = itemService.queryItemMainImgById(itemId);// 2.3 循环保存子订单数据到数据库String subOrderId = sid.nextShort();OrderItems subOrderItem = new OrderItems();subOrderItem.setId(subOrderId);subOrderItem.setOrderId(orderId);subOrderItem.setItemId(itemId);subOrderItem.setItemName(item.getItemName());subOrderItem.setItemImg(imgUrl);subOrderItem.setBuyCounts(buyCounts);subOrderItem.setItemSpecId(itemSpecId);subOrderItem.setItemSpecName(itemSpec.getName());subOrderItem.setPrice(itemSpec.getPriceDiscount());orderItemsMapper.insert(subOrderItem);// 2.4 在用户提交订单以后，规格表中需要扣除库存itemService.decreaseItemSpecStock(itemSpecId, buyCounts);}newOrder.setTotalAmount(totalAmount);newOrder.setRealPayAmount(realPayAmount);ordersMapper.insert(newOrder);// 3. 保存订单状态表OrderStatus waitPayOrderStatus = new OrderStatus();waitPayOrderStatus.setOrderId(orderId);waitPayOrderStatus.setOrderStatus(OrderStatusEnum.WAIT_PAY.type);waitPayOrderStatus.setCreatedTime(new Date());orderStatusMapper.insert(waitPayOrderStatus);// 4. 构建商户订单，用于传给支付中心MerchantOrdersVO merchantOrdersVO = new MerchantOrdersVO();merchantOrdersVO.setMerchantOrderId(orderId);merchantOrdersVO.setMerchantUserId(userId);merchantOrdersVO.setAmount(realPayAmount + postAmount);merchantOrdersVO.setPayMethod(payMethod);// 5. 构建自定义订单voOrderVO orderVO = new OrderVO();orderVO.setOrderId(orderId);orderVO.setMerchantOrdersVO(merchantOrdersVO);orderVO.setToBeRemovedShopcatdList(toBeRemovedShopcatdList);return orderVO;
}

/*** 从redis中的购物车里获取商品，目的：counts* @param shopcartList* @param specId* @return*/
private ShopcartBO getBuyCountsFromShopcart(List<ShopcartBO> shopcartList, String specId) {for (ShopcartBO cart : shopcartList) {if (cart.getSpecId().equals(specId)) {return cart;}}return null;
}

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