三级数据显示

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
    for (int j = 1; j < 3; j++) {
        Map<String, Object> main = new LinkedHashMap<String, Object>();
        main.put("show_1", "shou_1_" + j);
        List<Map<String, Object>> list2 = new ArrayList<Map<String, Object>>();
        for (int x = 1; x < 3; x++) {
            Map<String, Object> main2 = new LinkedHashMap<String, Object>();
            main2.put("show_2", "shou_2_" + x);
            List<Map<String, Object>> list3 = new ArrayList<Map<String, Object>>();
            for (int k = 1; k < 3; k++) {
                Map<String, Object> main3 = new LinkedHashMap<String, Object>();
                main3.put("show_3", "show_3_" + k);
                list3.add(main3);
            }
            main2.put("content", list3);
            list2.add(main2);
        }
        main.put("content", list2);
        list.add(main);
    }
    pageContext.setAttribute("list", list);