查不出数据直接返回空

sms_water/src/main/java/com/huaxu/service/impl/CameraManageServiceImpl.java

@@ -50,6 +50,9 @@ public class CameraManageServiceImpl implements CameraManageService {
         CameraManage cameraManage = this.cameraManageMapper.selectById(id);
 
         String baseUrl="https://open.ys7.com/ezopen/h5/iframe_se?url=ezopen://open.ys7.com/";
+        if(cameraManage==null){
+            return null;
+        }
         String token= getToken(cameraManage.getAppkey(),cameraManage.getScrert());
         cameraManage.setToken(token);
         if(cameraManage.getChannelNo()==null){