@Override
	public String toString() {
		return format();
	}
@Test
	public void formatBetweenTest2() {
		long betweenMs = DateUtil.betweenMs(DateUtil.parse("2018-07-16 12:25:23"), DateUtil.parse("2018-07-16 11:23:20"));
		BetweenFormatter formater = new BetweenFormatter(betweenMs, Level.SECOND, 5);
		assertEquals(formater.toString(), "1小时2分3秒");
	}