获取X天后的日期

import java.util.Calendar;

import java.util.Date;

public class main {

    public static void main(String[] args)  {

        Date today = getXdaysLater(0);

        Date oneMonLater = getXdaysLater(30);

        Date twoMonLater = getXdaysLater(60);

        Date halfYearLater = getXdaysLater(180);

        Date oneYearLater = getXdaysLater(365);

    }

    /**

     * 获取X天后的日期

     * @param X

     * @return

     */

    public static Date getXdaysLater(int X){

        Calendar  dateTimeNow = Calendar.getInstance();

        dateTimeNow.set(Calendar.HOUR_OF_DAY, 0);

        dateTimeNow.set(Calendar.MINUTE, 0);

        dateTimeNow.set(Calendar.SECOND, 0);

        dateTimeNow.set(Calendar.MILLISECOND, 0);

        dateTimeNow.add(Calendar.DATE,X);

        Date dateTimeResult = dateTimeNow.getTime();

        System.out.println(dateTimeResult);

        return dateTimeResult;

    }

}

结果

Tue Nov 07 00:00:00 CST 2017

Thu Dec 07 00:00:00 CST 2017

Sat Jan 06 00:00:00 CST 2018

Sun May 06 00:00:00 CST 2018

Wed Nov 07 00:00:00 CST 2018