缓存数据库会议预定数据，时间1分钟,修改每次都查数据库

xueyi-modules/xueyi-system/src/main/java/com/xueyi/system/meeting/controller/DmMeetingOrdersController.java

@@ -127,7 +127,12 @@ public class DmMeetingOrdersController extends BaseController<DmMeetingOrdersQue
         List<DmMeetingOrdersDto>  res = new ArrayList<>();
         if (RedisUtil.existed(REDIS_KEY+dateStr+":"+spaceId)) {
             logger.info("===lists meeting orders from redis===");
-            res = redisService.getCacheList(REDIS_KEY+dateStr+":"+spaceId);
+            Object obj = redisService.getCacheObject(REDIS_KEY+dateStr+":"+spaceId);
+            if (!(obj instanceof String)) {
+                res = redisService.getCacheList(REDIS_KEY+dateStr+":"+spaceId);
+            } else {
+                logger.info("===empty meeting orders from redis===");
+            }
         } else {
             logger.info("===lists meeting orders from db===");
             List<DmMeetingOrdersPo> list = dmMeetingOrdersMapper.findListByDate(dateStr, spaceId);