时间相差天数

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;


public class DateTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		SimpleDateFormat sf=new SimpleDateFormat("yyyyMMdd");
	 try {
		Date date=sf.parse("20090125");
		 Calendar cl=Calendar.getInstance();
		  cl.setTime(date);
		  int year1=cl.get(Calendar.YEAR);
		 int day1= cl.get(Calendar.DAY_OF_YEAR );
		Date date2=cl.getTime();
		  Calendar c2=Calendar.getInstance();
		  int year2=c2.get(Calendar.YEAR);
		 int day2= c2.get(Calendar.DAY_OF_YEAR);
		 System.out.println((year2-year1)*365+(day2-day1));
	} catch (ParseException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	    
	}

}