public static String formatHttpDate(Date date) {
		if (null == date) {
			return null;
		}
		return DatePattern.HTTP_DATETIME_FORMAT.format(date);
	}
@Test
	public void formatHttpDateTest() {
		final String formatHttpDate = DateUtil.formatHttpDate(DateUtil.parse("2019-01-02 22:32:01"));
		assertEquals("Wed, 02 Jan 2019 14:32:01 GMT", formatHttpDate);
	}