java 实现指定日期添加天数

public static void main(String[] args) {Date d = null;SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");try {d = format.parse("2012-05-01 00:09:00");String date = format.format(d);System.out.println("现在的日期是：" + date);d = addDate(d, 5);System.out.println("增加天数以后的日期：" + format.format(d));} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static Date addDate(Date d, long day) throws ParseException {long time = d.getTime();day = day * 24 * 60 * 60 * 1000;time += day;return new Date(time);}