fix

zhongzheng-system/src/main/java/com/zhongzheng/modules/grade/service/impl/ClassGradeUserServiceImpl.java

@@ -619,7 +619,8 @@ public class ClassGradeUserServiceImpl extends ServiceImpl<ClassGradeUserMapper,
                 return respone;
             }
         } catch (IOException e) {
-            throw new CustomException("请求错误");
+        //    throw new CustomException("请求错误");
+            return null;
         }
     }