Exception in JSP: /jpk/course/layout/lesson/notice2.jsp:39 36: //传参 37: Long nLessID = (Long) session.getAttribute("lid"); 38: if (nLessID == null) { 39: throw new Exception(appContext.getMessage("error.info.classification.import", null, request.getLocale())); 40: } 41: 42: ElaCourseService service = (ElaCourseService) ZyAppContext.getBean("elaCourseService"); Stacktrace:！