如何在JSP页面中得到第二天的日期

Question

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    Calendar rightNow = Calendar.getInstance();
    rightNow.add(Calendar.DAY_OF_MONTH,+7);
    System.out.println(rightNow );

Answer 1

java.util.Date date=new java.util.Date();
double tmp=date.getTime()+(1000*3600*24*7);
date=new java.util.Date((long)tmp);

Answer 2

import java.util.GregorianCalendar;
import java.util.Date;
import java.text.SimpleDateFormat;//当天以后到第7天的日期
SimpleDateFormat formatDate_ = new SimpleDateFormat("yyyy/MM/dd");
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(new Date());
cal.add(GregorianCalendar.DATE, 7);
String sdate = formatDate_.format(cal.getTime());
System.out.print(sdate);

Answer 3

import java.util.GregorianCalendar;
import java.util.Date;
import java.text.SimpleDateFormat;//当天以后到第i天的日期
SimpleDateFormat formatDate_ = new SimpleDateFormat("yyyy/MM/dd");
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(new Date());
cal.add(GregorianCalendar.DATE, i);
String sdate = formatDate_.format(cal.getTime());
System.out.print(sdate);