fix

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

@@ -1226,6 +1226,9 @@ public class ClassGradeUserServiceImpl extends ServiceImpl<ClassGradeUserMapper,
         try {
             respone = HttpUtils.postFormBody(OFFICIALPUSH_SEVEN_PERIODPATH, params);
             log.info("学时信息推送参数结果"+ respone);
+            if(Validator.isEmpty(respone)){
+                return null;
+            }
             String[] split = respone.split("\\|");
             if (split.length < 2) {
                 return "推送接口返回数据错误";