fix

@@ -1438,7 +1438,8 @@ public class ProductServiceImpl implements ProductService {
                 innerList.addAll(skuContent.values());
                 // 排下序是稳妥的
                 Collections.sort(innerList, (o1, o2) -> {
-                    double sub = Double.parseDouble(o1.getSkuSize()) - Double.parseDouble(o2.getSkuSize());
+                    int sub = (o1.getSkuSize() == null || o2.getSkuSize() == null) ? 0 : (o1.getSkuSize().compareTo(o2.getSkuSize()));
+                    // double sub = Double.parseDouble(o1.getSkuSize()) - Double.parseDouble(o2.getSkuSize());
                     if (sub < 0)
                         return -1;
                     else if (sub > 0)