前端+后端：完整接入订单确认的优惠劵计算

order/order-application/src/main/java/cn/iocoder/mall/order/application/controller/users/UsersCartController.java

@@ -105,7 +105,7 @@ public class UsersCartController {
     }
 
     @GetMapping("/confirm_create_order")
-    public CommonResult<UsersOrderConfirmCreateVO> getConfirmCreateOrder(@RequestParam("couponCardId") Integer couponCardId) {
+    public CommonResult<UsersOrderConfirmCreateVO> getConfirmCreateOrder(@RequestParam(value = "couponCardId", required = false) Integer couponCardId) {
         Integer userId = UserSecurityContextHolder.getContext().getUserId();
         // 获得购物车中选中的
         List<CartItemBO> cartItems = cartService.list(userId, true).getData();

order/order-application/src/main/java/cn/iocoder/mall/order/application/controller/users/UsersOrderController.java

@@ -94,7 +94,7 @@ public class UsersOrderController {
     @ApiOperation("确认创建订单")
     public CommonResult<UsersOrderConfirmCreateVO> getConfirmCreateOrder(@RequestParam("skuId") Integer skuId,
                                                                          @RequestParam("quantity") Integer quantity,
-                                                                         @RequestParam("couponCardId") Integer couponCardId) {
+                                                                         @RequestParam(value = "couponCardId", required = false) Integer couponCardId) {
         // 创建 CalcOrderPriceDTO 对象，并执行价格计算
         CalcOrderPriceDTO calcOrderPriceDTO = new CalcOrderPriceDTO()
                 .setUserId(UserSecurityContextHolder.getContext().getUserId())

order/order-application/src/main/java/cn/iocoder/mall/order/application/vo/UsersOrderConfirmCreateVO.java

@@ -24,6 +24,10 @@ public class UsersOrderConfirmCreateVO {
      * 优惠劵列表 TODO 芋艿，后续改改
      */
     private List<CouponCardAvailableBO> couponCards;
+    /**
+     * 优惠劵优惠金额
+     */
+    private Integer couponCardDiscountTotal;
     /**
      * 商品分组
      *