设备状态页面添加修改时间

hazard-admin/src/main/java/com/ozs/web/core/util/CameraUtil.java

@@ -264,7 +264,7 @@ public class CameraUtil {
      * @return
      */
     public static String alarmHistoryPlay(String channel,String cameraCode, Date startTm, Date endTm) {
-
+        return  null;
     }
 
     /**