JAVA---两个日期的差

 

package Work;
//日期差

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class Test{

 public static void main(String[] args) throws ParseException {

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

  Date d1=sdf.parse("2013-09-08");

  Date d2=sdf.parse("2013-10-01");

  System.out.println(daysButween(d1,d2));

 }
 public static int daysButween(Date d1, Date d2) throws ParseException {

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

  d1=sb.parse(sb.format(d1));
  d2=sb.parse(sb.format(d2));

  Calendar cal=Calendar.getInstance();

  cal.setTime(d1);

  long time1=cal.getTimeInMillis();

  cal.setTime(d2);

  long time2=cal.getTimeInMillis();

  long between_days=(time2-time1)/(1000*3600*24);

  return Integer.parseInt(String.valueOf(between_days));  

 }
}