时间工具类

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
    long time = simpleDateFormat.parse("2019-11-05 21:06:30").getTime();
    System.out.println(time);
    String format = simpleDateFormat.format(new Date(1572959190000L));
    System.out.println(format);
} catch (ParseException e) {
    e.printStackTrace();
}