public static long getTimeInHour(long ms) {
        return ms - ms % HOUR_IN_MILL;
    }
@Test
    public void testGetTimeInHour() throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = sdf.parse("2019-04-18 15:32:33");
        long timeInHour = TimeUtils.getTimeInHour(date.getTime());
        Assert.assertEquals("2019-04-18 15:00:00", sdf.format(timeInHour));
    }