时间操作（Java版）—获取距离系统时间N天后的日期时间信息

import java.util.Calendar;import java.util.TimeZone;public class Test {/*** 获取距离系统时间N天后的日期时间信息* * @author GaoHuanjie*/public String getDateAfterNdays(int days){Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+8"));calendar.setTimeInMillis(System.currentTimeMillis()-1000L * 60 * 60 * 24 * days);return calendar.get(Calendar.YEAR) + "-" + (calendar.get(Calendar.MONTH) + 1) + "-" + calendar.get(Calendar.DAY_OF_MONTH) + " "+ calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE) + ":" + calendar.get(Calendar.SECOND); }public static void main(String[] args) {System.out.println(new Test().getDateAfterNdays(2));}}