jsp中的时间问题！！！

Question

你先构造出时间字符串吧,然后用时间转化函数转化.好像是java.text.simpleTimeFormat类吧

Answer 1

import java.util.Date;
import java.util.GregorianCalendar;Date dt=new Date();
GregorianCalendar gc=new GregorianCalendar();
gc.setTime(dt);
gc.add(GregorianCalendar.YEAR20)
dt=gc.getTime()

Answer 2

int daysFromstart2end=0;
    Date startDate = new Date();
    Date endDate=new Date();
    GregorianCalendar gc=new GregorianCalendar();
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
    String startDateString="2004-01-11";
    String endDateString="2004-02-14";
    
      startDate = sdf.parse(startDateString);
      endDate=sdf.parse(endDateString);
      gc.setTime(startDate);
      do{
        gc.add(GregorianCalendar.DAY_OF_MONTH,1);
        daysFromstart2end++;
      }while(!gc.getTime().equals(endDate));
 System.out.println("There are "+daysFromstart2end+" days between "+startDateString+" to "+endDateString);