System ?工具类
public static long currentTimeMillis()// 获得当前时间的毫秒值long ?start = System. currentTimeMillis ();?Date ?类
//创建时间对象,获得当前时间Date d = ?new Date();//获得当前时间的毫秒值System. out .println(d.getTime());Calendar 便宜美国vps ?类
// 获得日历对象Calendar c = Calendar. getInstance ();// 获得当前时间的毫秒值long todayTime = c.getTimeInMillis();?
