获取最近几个月的日期集合

  public static List<String> getRecentMonth(int j){
        List<String> dateList  = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
        for (int i = 0; i > -j ; i--) {
            Calendar calendar = Calendar.getInstance();
            calendar.add(Calendar.MONTH, i);
            dateList.add(sdf.format(calendar.getTime()));
        }
        return dateList;
    }