工具类

日期推移加减

	public static void main(String[] args) {
		Date sdate = new Date();
        Calendar cale = Calendar.getInstance();
        cale.setTime(sdate);
        //往后加50天
        cale.add(Calendar.DATE, 50);
        Date time = cale.getTime();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        System.out.println(format.format(time));
	}