/**

     * 获取day天之后的日期

     * @param day 天数

     * @return

     */

    public static String getDate(int day){

        Calendar calendar1 = Calendar.getInstance();

        calendar1.add(Calendar.DATE, day);

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        return sdf.format(calendar1.getTime());

    }