【List】字段排序

单个字段排序

voList.sort((x, y) -> Double.compare(x.getAge(), y.getAge()));

多个字段排序

voList.stream().sorted(Comparator.comparing(DayVo::getAge).reversed()
                .thenComparing(DayVo::getCount, Comparator.reverseOrder()))
                .collect(Collectors.toList());

list集合根据时间字段排序

    public static List listSort2(List<DayVo> initList) {
        List<DayVo> list = initList;
        Collections.sort(list, new Comparator<DayVo>() {
            @Override
            public int compare(DayVo vo1, DayVo vo2) {
                String day1 = vo1.getDay();
                String day2 = vo2.getDay();
                DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd");
                //字符串转日期
                LocalDate date1 = LocalDate.parse(day1,format);
                LocalDate date2 = LocalDate.parse(day2,format);
                return date1.compareTo(date2);
            }
        });
        Collections.reverse(list);
        return list;
    }