获取当前日期最近7天的日期集合

private static List<String> getLastWeekDate(){

List<String> list = new ArrayList<String>();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
String today = sdf.format(c.getTime());
list.add(today);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus1 = sdf.format(c.getTime());
list.add(today_plus1);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus2 = sdf.format(c.getTime());
list.add(today_plus2);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus3 = sdf.format(c.getTime());
list.add(today_plus3);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus4 = sdf.format(c.getTime());
list.add(today_plus4);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus5 = sdf.format(c.getTime());
list.add(today_plus5);
c.add(Calendar.DAY_OF_YEAR, -1);
String today_plus6 = sdf.format(c.getTime());
list.add(today_plus6);

return list;
}

把时间排序一下 大到小的排序或者是小到大的排序

Collections.reverse(时间集合);