java虚拟机 换时区

     改成国时区

     TimeZone.setDefault(TimeZone.getTimeZone("Asia/Shanghai"));   //     TimeZone tz = TimeZone.getTimeZone("ETC/GMT-8");

        System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date()));
        System.out.println(System.currentTimeMillis());
        System.out.println(new Date(System.currentTimeMillis()));
        System.out.println(new Date());