乐器提供方式修改

mec-biz/src/main/java/com/ym/mec/biz/service/impl/MusicGroupServiceImpl.java

@@ -436,7 +436,7 @@ public class MusicGroupServiceImpl extends BaseServiceImpl<String, MusicGroup> i
                 }
             }
         } else if (registerPayDto.getGoodsGroups() != null && registerPayDto.getGoodsGroups().size() > 0) {
-            String goodsGroupIds = registerPayDto.getGoodsGroups().keySet().stream().map(key -> key.toString()).collect(Collectors.joining(","));
+            String goodsGroupIds = registerPayDto.getGoodsGroups().keySet().stream().map(Object::toString).collect(Collectors.joining(","));
             goodsGroups = musicGroupSubjectGoodsGroupService.findGoodsGroupByIds(goodsGroupIds);
             for (MusicGroupSubjectGoodsGroup goodsGroup : goodsGroups) {
                 Map groupType = JSONObject.parseObject(goodsGroup.getKitGroupPurchaseTypeJson(), HashMap.class);