获取前一周的日期

//获取最近一周的日期 String[] getBeforeWeekOfDate(){Calendar calendar=Calendar.getInstance();//当前日期是2017-06-5String[]oneWeekDate=new String[7];SimpleDateFormat sf=new SimpleDateFormat("yyyy-MM-dd");for(int i=0;i<7;i++){calendar.add(Calendar.DAY_OF_MONTH, -1);oneWeekDate[i]=sf.format(calendar.getTime()).toString();}return oneWeekDate;}//结果是//2017-06-04//2017-06-03//2017-06-02//2017-06-01//2017-05-31//2017-05-30//2017-05-29