优惠券金额空指针

Cui Zhi Feng

2024-09-19 5b5b6440da8b7851343a84e378e8a3340ac08d5d

 src/main/java/com/mzl/flower/service/payment/OrderService.java

@@ -16,6 +16,7 @@
import com.mzl.flower.dto.request.payment.*;
import com.mzl.flower.dto.response.flower.FlowerCartListDTO;
import com.mzl.flower.dto.response.flower.FlowerCartListWrapDTO;
import com.mzl.flower.dto.response.flower.FlowerDTO;
import com.mzl.flower.dto.response.flower.ParamItemDTO;
import com.mzl.flower.dto.response.partner.PartnerOrderDTO;
import com.mzl.flower.dto.response.payment.*;
@@ -25,6 +26,7 @@
import com.mzl.flower.entity.coupon.CouponRecordDO;
import com.mzl.flower.entity.customer.Address;
import com.mzl.flower.entity.customer.Customer;
import com.mzl.flower.entity.flower.Flower;
import com.mzl.flower.entity.flower.FlowerSupplierSaleNum;
import com.mzl.flower.entity.menber.Member;
import com.mzl.flower.entity.partner.Partner;
@@ -158,6 +160,7 @@
    @Autowired
    private CouponRecordService couponRecordService;


    public void changeFlower2Cart(CartSaveDTO dto) {
        String userId = SecurityUtils.getUserId();
        String key = userId + "_" + dto.getId();
@@ -178,9 +181,41 @@
                c.setNum(dto.getNum());
                c.create(userId);

                // 限购  1.首先查看购物车中的数量是否已经超过限售数量
                final FlowerDTO flowerDetail = flowerService.getFlowerDetail(c.getFlowerId());
                if(null!=c.getNum() && null!=flowerDetail.getLimited()
                        && c.getNum().compareTo(flowerDetail.getLimited())>0){
                    throw new ValidationException("数量不能超过限售数量！");
                }

                // 限购  2.查看已结单的订单的当前花朵已经购买的数量，加当前购物车的加入的数量是否超过限购的数量，查看当前5点前到昨天五点前
                Integer completeNumToday=getFlowerCompleteNumToday(userId,c.getFlowerId());
                Integer tmp=completeNumToday+c.getNum();
                if(null!=tmp && null!=flowerDetail.getLimited()
                      &&  tmp.compareTo(flowerDetail.getLimited())>0){
                    throw new ValidationException("当天的订单的花数量加上购物车的数量不能超过限售数量！");
                }

                cartMapper.insert(c);
            } else {
                // 查看是否已经超过当前商品的限购数量
                final FlowerDTO flowerDetail = flowerService.getFlowerDetail(c.getFlowerId());
                c.setNum((c.getNum()==null?0:c.getNum()) + dto.getNum());

                // 限购  1.首先查看购物车中的数量是否已经超过限售数量
                if(null!=c.getNum() && null!=flowerDetail.getLimited()
                      && c.getNum().compareTo(flowerDetail.getLimited())>0){
                    throw new ValidationException("数量不能超过限售数量！");
                }

                // 限购  2.查看已结单的订单的当前花朵已经购买的数量，加当前购物车的加入的数量是否超过限购的数量，查看当前5点前到昨天五点前
                Integer completeNumToday=getFlowerCompleteNumToday(userId,c.getFlowerId());
                Integer tmp=completeNumToday+c.getNum();
                if(null!=tmp && null!=flowerDetail.getLimited()
                       && tmp.compareTo(flowerDetail.getLimited())>0){
                    throw new ValidationException("当天的订单的花数量加上购物车的数量不能超过限售数量！");
                }

                c.update(userId);
                if (c.getNum() <= 0) {
                    cartMapper.deleteById(c.getId());
@@ -298,6 +333,8 @@
    }

    public PreOrderDTO getPreOrderInfo(List<CartSaveDTO> flowers, Map<Long, PriceDTO> priceMap) {
        String userId = SecurityUtils.getUserId();

        if (flowers == null || flowers.size() == 0) {
            throw new ValidationException("请选择商品");
        }
@@ -313,6 +350,18 @@
            }
            idNumMap.put(id, num);
        }

        // 限购数量校验 鲜花数量校验
        flowers.forEach(cartSaveDTO -> {
            // 限购数量 鲜花数量校验
            Integer completeNumToday=getFlowerCompleteNumToday(userId,cartSaveDTO.getId());
            Integer tmp=completeNumToday+cartSaveDTO.getNum();
            Flower flower=flowerMapper.selectById(cartSaveDTO.getId());
            if(null!=flower.getLimited() && tmp.compareTo(flower.getLimited())>0){
                throw new ValidationException("商品:'"+flower.getName()+"' 昨天17:00到今天17:00 超过限售数量："+flower.getLimited()+"！");
            }
        });

        PreOrderDTO result = new PreOrderDTO();

        List<FlowerCartListDTO> ls = flowerMapper.selectFlowerOrderList(ids);
@@ -395,6 +444,17 @@
    }

    public Map commitOrder(OrderCommitDTO dto, PreOrderDTO p, Map<Long, PriceDTO> priceMap) {
        String userId = SecurityUtils.getUserId();
        p.getFlowers().forEach(flower -> {
            // 限购数量 鲜花数量校验
            Integer completeNumToday=getFlowerCompleteNumToday(userId,flower.getId());
            Integer tmp=completeNumToday+flower.getNum();
            if(null!=tmp && null!=flower.getLimited()
                    && tmp.compareTo(flower.getLimited())>0){
                throw new ValidationException("商品:'"+flower.getName()+"' 昨天17:00到今天17:00 超过限售数量："+flower.getLimited()+"！");
            }
        });

        WxMaJscode2SessionResult session = null;
        try {
            session = weChatService.getWxMaSessionInfo(dto.getWxcode());
@@ -417,7 +477,7 @@
            deliveryName = d.getName();
        }

        String userId = SecurityUtils.getUserId();

        Order order = new Order();
        order.setId(UUIDGenerator.getUUID());

@@ -460,7 +520,7 @@
        if(totalAmount.doubleValue() <= 0){//假如总价小于等于0，则支付0.01元
            totalAmount = new BigDecimal(0.01);
        }
        order.setTotalAmount(totalAmount.add(p.getPacking()).add(transportFee));
        order.setTotalAmount(totalAmount);

        order.setCustomer(address.getName());
        order.setCustomerTel(address.getTel());
@@ -481,10 +541,11 @@
        List<FlowerCartListDTO> flowers = p.getFlowers();
        Map<Long, List<ParamItemDTO>> paramMap = new HashMap<>();
        final BigDecimal flowerAmount = order.getFlowerAmount();//订单商品总价
        final BigDecimal memberCouponAmount = order.getMemberCouponAmount();//使用优惠券面值
        final BigDecimal memberCouponAmount = getAmount(order.getMemberCouponAmount());//使用优惠券面值
        BigDecimal usedCouponAmount = new BigDecimal(0);
        for (int i = 0; i < flowers.size(); i++) {
            FlowerCartListDTO f = flowers.get(i);

            OrderItem t = new OrderItem();
            t.setId(UUIDGenerator.getUUID());
            t.setOrderId(order.getId());
@@ -517,9 +578,15 @@
            BigDecimal couponAmount = calculateCoupon(memberCouponAmount, t.getTotal()
                    , flowerAmount, t.getNum(), t.getPrice(), isLastOne, usedCouponAmount);
            t.setCouponAmount(couponAmount);//每扎平摊的优惠券面值
            t.setRealPrice(t.getPrice().subtract(couponAmount));//退款时使用的真实成交价
            t.setRealPrice(t.getPrice().subtract(couponAmount));//退款时使用的真实成交单价

            usedCouponAmount = usedCouponAmount.add(couponAmount.multiply(BigDecimal.valueOf(t.getNum())));
            t.setCouponAmountTotal(couponAmount.multiply(BigDecimal.valueOf(t.getNum())));
            if(isLastOne){
                t.setCouponAmountTotal(memberCouponAmount.subtract(usedCouponAmount));
            } else {
                usedCouponAmount = usedCouponAmount.add(t.getCouponAmountTotal());
            }
            t.setRealTotal(t.getTotal().subtract(t.getCouponAmountTotal()));

            t.create(userId);
            orderItemMapper.insert(t);
@@ -570,7 +637,7 @@
    private BigDecimal calculateCoupon(BigDecimal couponAmount, BigDecimal itemTotalAmount
            , BigDecimal totalAmount, Integer num, BigDecimal price
            , boolean isLastOne, BigDecimal usedCouponAmount){
        if(couponAmount == null){
        if(couponAmount == null || couponAmount.doubleValue() == 0){
            return new BigDecimal(0);
        }

@@ -581,9 +648,13 @@
            BigDecimal subCoupon = couponAmount.subtract(usedCouponAmount);//占有的优惠券面值
            return subCoupon.divide(BigDecimal.valueOf(num), 2, RoundingMode.HALF_UP);
        }
        BigDecimal radio = itemTotalAmount.divide(totalAmount, 2, RoundingMode.HALF_UP);//计算该商品总价在订单中的占比

        /*BigDecimal radio = itemTotalAmount.divide(totalAmount, 2, RoundingMode.HALF_UP);//计算该商品总价在订单中的占比
        BigDecimal subCoupon = couponAmount.multiply(radio);//占有的优惠券面值
        return subCoupon.divide(BigDecimal.valueOf(num), 2, RoundingMode.HALF_UP);
        return subCoupon.divide(BigDecimal.valueOf(num), 2, RoundingMode.HALF_UP);*/

        //不能分步计算，分步计算会有精度问题
        return couponAmount.multiply(itemTotalAmount).divide(totalAmount.multiply(BigDecimal.valueOf(num)), 2, RoundingMode.HALF_UP);
    }

    private CouponRecordDO useCouponRecord(String orderId, BigDecimal amount, String couponRecordId){
@@ -802,10 +873,9 @@
                orderIds.add(o.getId());
            }

            List<OrderItem> itemList = orderItemMapper.selectList(
                    new QueryWrapper<OrderItem>().in("order_id", orderIds));
            List<OrderItemListDTO> itemList = orderItemMapper.getOrderItems(orderIds);
            Map<String, List<OrderItemListDTO>> map = new HashMap<>();
            for (OrderItem oi : itemList) {
            for (OrderItemListDTO oi : itemList) {
                String orderId = oi.getOrderId();
                List<OrderItemListDTO> ll = map.computeIfAbsent(orderId, k -> new ArrayList<>());
                OrderItemListDTO d = new OrderItemListDTO();
@@ -929,8 +999,9 @@
                if(llc == null){
                    llc = new OrderCheckLocationListDTO();
                    BeanUtils.copyProperties(c, llc);
                    rMap.put(locationId, llc);
                    llc.setTotalAmount(new BigDecimal(0));

                    rMap.put(locationId, llc);
                    result.add(llc);
                }

@@ -1491,4 +1562,9 @@
        Order o = orderMapper.getUserLastOrder(userId);
        return o.getReceiveTime();
    }

    public Integer getFlowerCompleteNumToday(String userId,Long flowerId){
        Integer completeNum= orderMapper.getFlowerCompleteNumToday(userId,flowerId);
        return completeNum;
    }
}