去上一周的日期

Question

怎么样通过javascript或者java来取得上周是从几号到几号的啊

Answer 1

      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
      Calendar c = Calendar.getInstance();
      c.add(Calendar.DAY_OF_WEEK, -c.get(Calendar.DAY_OF_WEEK));
      String to = sdf.format(c.getTime());      c.add(Calendar.DAY_OF_WEEK, -7);
      String from = sdf.format(c.getTime());      System.err.println("last week is from " + from + " to " + to);

Answer 2

javaDate startDate = null;
Date endDate = null;

Calendar c = Calendar.getInstance();//当天
c.add(Calendar.WEEK_OF_MONTH, -1);//上一周的同一天

if(c.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY){
c.add(Calendar.DAY_OF_YEAR, -1);
}

c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);//上周一
startDate = c.getTime();

c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);//上同六
c.add(Calendar.DAY_OF_WEEK, 1);//上周日
endDate = c.getTime();

Answer 3

为什么一定要加 c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);//上同六
这句话啊