方法代码
@At("queryStuLesson")
    @Ok("jsp:lesson")
    public void queryStuLesson(HttpServletRequest request){
        int stuid = Integer.parseInt(request.getParameter("stuid"));
        Student students = dao.fetchLinks(dao.fetch(Student.class, stuid), "lesson");
        List<Lesson> lesson = students.getLesson();
        Lesson lesson2=new Lesson();
        for (Lesson  lesson1: lesson){

            lesson2.setLesname(lesson1.getLesname());
            if(lesson2!=null){
                request.setAttribute("less",lesson2);
            }
            request.setAttribute("less","该学生没有课程");
        }
        }
前端代码
 <div>${less}</div>