java 日期计算加减

java计算日期加减

public static void main(String[] args) {

  String lastConTime = "2011-11-23";

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

  GregorianCalendar  calendar = new GregorianCalendar();

  try {

   Date dateTime = dateFormat.parse(lastConTime);

   calendar.setTime(dateTime);

   calendar.add(calendar.DAY_OF_YEAR, 10);

   Date lastTime = calendar.getTime();

   String confirmTime = dateFormat.format(lastTime);

   System.out.println(confirmTime);

  } catch (ParseException e) {

   e.printStackTrace();

  }

}