Java输出系统当前的日期(年月日时分秒毫秒)

Shun

package test.remote.tools.combine; 
import java.text.SimpleDateFormat; 
import java.util.Calendar; 
import java.util.Date; 
import java.util.GregorianCalendar; 
public class TestOutDate 
{ 
public static void main(String[] args) 
{ 
//method 1 
Calendar nowtime = new GregorianCalendar(); 
String strDateTime="["+String.format("%04d", nowtime.get(Calendar.YEAR))+"/"+ 
String.format("%02d", nowtime.get(Calendar.MONTH))+"/" + 
String.format("%02d", nowtime.get(Calendar.DATE))+" " + 
String.format("%02d", nowtime.get(Calendar.HOUR))+":" + 
String.format("%02d", nowtime.get(Calendar.MINUTE))+":" + 
String.format("%02d", nowtime.get(Calendar.SECOND))+"." + 
String.format("%03d", nowtime.get(Calendar.MILLISECOND))+"]"; 
System.out.println(strDateTime); 
//method 2 
String msg=""; 
Date date = new Date(); 
SimpleDateFormat sdf = new SimpleDateFormat("YYYY/MM/dd HH:mm:ss.SSS"); 
msg+="["+sdf.format(date)+"]"; 
System.out.println(msg); 
} 
}

运行结果：
[2013/08/09 05:54:32.578]
[2013/09/09 17:54:32.625]