Java学习笔记 --- 获取系统当前时间

import java.sql.Date;import java.text.SimpleDateFormat;public class Ctrl{ public static void main(String[] args){SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date curDate = new Date(System.currentTimeMillis());String str = formatter.format(curDate);System.out.println(str);}}