HTTP 응답메시지 위한 날짜출력 응용

package test;

import java.text.SimpleDateFormat;
import java.util.*;

public class test {

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

TimeZone.setDefault(TimeZone.getTimeZone("GMT"));

Date date;
// SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat date_format = new SimpleDateFormat("dd MM yyyy HH:mm:ss");
String today;

Calendar now = Calendar.getInstance();
date = now.getTime();
System.out.println(date_format.format(date));
//today= date.toGMTString();
System.out.println(date.toGMTString());
// System.out.println(date);
System.out.println(now.getTime());

}

}