java 日期加天数得到新的日期

package com.zhang.test;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.sun.org.apache.xerces.internal.impl.xpath.regex.ParseException;

public class Test {

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);

}

/**

* @param args

*/

public static void main(String[] args) {

/*

java.util.Date dt=new java.util.Date();

System.out.println(dt); //输出结果是：Wed Aug 10 11:29:11 CST 2005

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

System.out.print(sdf.format(dt) + 12);

*/

Date d = new Date();

Date newDate = addDate(d, 12);

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

System.out.println(dateFormat.format(d));

System.out.println(dateFormat.format(newDate));

}

}