数据判断验证

zc-business/src/main/java/com/zc/business/controller/DcDeviceController.java

@@ -1957,7 +1957,7 @@ private VideoController videoController;
     public TableDataInfo dcDoorOpen(){
         startPage();
         Map<String, Object> redisCacheCacheMap = redisCache.getCacheMap(DOORSTATUS);
-        if (redisCacheCacheMap==null){
+        if (redisCacheCacheMap==null||redisCacheCacheMap.size()==0){
             return getDataTable(Collections.emptyList());
         }
         Set<String> strings = redisCacheCacheMap.keySet();