修改

operation_manager/src/main/java/com/huaxu/order/controller/WorkOrderManageController.java

@@ -387,6 +387,8 @@ public class WorkOrderManageController {
             } catch (IOException e) {
                 return new AjaxMessage<>(ResultStatus.ERROR, e.getMessage());
             }
+        }else{
+            return new AjaxMessage<>(ResultStatus.ERROR, "上传文件不能为空");
         }
         return new AjaxMessage<>(ResultStatus.OK, avatar);
     }