//可以设置指定那一天:例如,最近一周,参数传入-7,最近一月,参数传入-30... private String getBeginDate(int date) throws ParseException {        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");        Date beginTime = new Date();        Calendar beginCalendar = Calendar.getInstance();        beginCalendar.setTime(beginTime);        beginCalendar.add(Calendar.DATE, date);        return sdf.format(beginCalendar.getTime());    }