LONG、DATE、STRING相互转换

import java.text.ParseException;


public static void main(String[] args) throws ParseException{ 
Date date; 
String da = "2008-12-28 22:29:30"; 
SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); 
long time = df.parse(da).getTime();   
System.out.println(time); 
date = new Date(time); 
System.out.println(df.format(date)); 
}