日期获取最近七天，最近几个月

SimpleDateFormat sdf = new SimpleDateFormat("M.dd");
for (int i = 6; i >=0; i--) {
    Date date = DateUtils.addDays(new Date(), -i);
    String formatDate = sdf.format(date);
    dateList.add(formatDate);
}

private static List<String> getMonList(Integer total, SimpleDateFormat sdf) {
    List<String> dateList = new ArrayList<>();
    // SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd");
    for (int i = 0; i < total; i++) {
        Date date = DateUtils.addDays(new Date(), -i);
        String formatDate = sdf.format(date);
        dateList.add(formatDate);
    }
    return dateList;
}