Exception in JSP: /jpk/course/layout/lesson/notice.jsp:38 35: //传参 36: Long nLessID = (Long) session.getAttribute("lid"); 37: if (nLessID == null) { 38: throw new Exception(appContext.getMessage("error.info.classification.import", null, request.getLocale())); 39: } 40: 41: ElaCourseService service = (ElaCourseService) ZyAppContext.getBean("elaCourseService"); Stacktrace:！