支付0元回调

src/main/java/com/izouma/nineth/service/OrderService.java

@@ -298,7 +298,7 @@ public class OrderService {
                 collectionRepo.setOnShelf(collectionId, false);
             }
             order = orderRepo.save(order);
-            if (order.getTotalPrice().equals(BigDecimal.ZERO)) {
+            if (order.getTotalPrice().compareTo(BigDecimal.ZERO) <= 0) {
                 notifyOrder(order.getId(), PayMethod.WEIXIN, null);
             }