判空错误

tuoheng-admin/src/main/java/com/tuoheng/admin/service/impl/ThInspectionServiceImpl.java

@@ -105,7 +105,7 @@ public class ThInspectionServiceImpl extends BaseServiceImpl<ThInspectionMapper,
     public JsonResult executeTask(Integer taskId) throws ServiceException{
 
         ThMission thMission = missionMapper.selectById(taskId);
-        Assert.isNull(thMission,"任务不能为空！");
+        Assert.notNull(thMission,"任务不能为空！");
         taskId=Integer.valueOf(thMission.getInspectionLine());
         //这边需要配置到yml文件里面
         String url = CommonConfig.airportUrl + "/api/airportInterface/executeTask";