jdk1.8排序

  PageInfo<Map<String, Object>> pageInfo = new PageInfo<>(list);
     pageBean.setTotal(pageInfo.getTotal());
     List<Map<String, Object>> list2 = pageInfo.getList();
     List<Map<String, Object>> list3 = list2.stream().sorted(AppletUserCenterService::comparator).collect(Collectors.toList());
     
public static int comparator(Map<String, Object> map1, Map<String, Object> map2) {
        if (map1 == null || map2 == null) {
            throw new NullPointerException();
        }
        int age1 = (int) map1.get("helpNumber");
        int age2 = (int) map2.get("helpNumber");

        return age2 - age1;
    }

来源：CSDN

作者：侠义非凡的郭先生

链接：https://blog.csdn.net/guoYLong/article/details/103478904