public static DateTime parse(CharSequence dateStr, DateFormat dateFormat) {
		return new DateTime(dateStr, dateFormat);
	}
@Test
	public void parseNormFullTest() {
		String str = "2020-02-06 01:58:00.000020";
		DateTime dateTime = DateUtil.parse(str);
		assertNotNull(dateTime);
		assertEquals("2020-02-06 01:58:00.000", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));

		str = "2020-02-06 01:58:00.00002";
		dateTime = DateUtil.parse(str);
		assertNotNull(dateTime);
		assertEquals("2020-02-06 01:58:00.000", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));

		str = "2020-02-06 01:58:00.111000";
		dateTime = DateUtil.parse(str);
		assertNotNull(dateTime);
		assertEquals("2020-02-06 01:58:00.111", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));

		str = "2020-02-06 01:58:00.111";
		dateTime = DateUtil.parse(str);
		assertNotNull(dateTime);
		assertEquals("2020-02-06 01:58:00.111", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));
	}