java 获取指定日期

//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());

    }