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