更新！

OneCardIotServer/src/main/java/com/zhongshu/iot/server/core/service/device/GateWayUserInfoService.java

@@ -342,6 +342,9 @@ public class GateWayUserInfoService {
      * @return
      */
     public ResultContent deleteMqttUser(GateWayUserInfoNameParam param) {
+        if (StringUtils.isEmpty(param.getUserName())) {
+            return ResultContent.buildFail("userName不能为空");
+        }
         GateWayUserInfo entity = gateWayUserInfoDao.findTopByUserName(param.getUserName());
         if (ObjectUtils.isEmpty(entity)) {
             return ResultContent.buildFail(String.format("%s 账号不存在", param.getUserName()));