public static CronPattern of(String pattern) {
		return new CronPattern(pattern);
	}
@Test
	public void rangeYearTest() {
		assertThrows(CronException.class, () -> {
			// year的范围是1970~2099年，超出报错
			CronPattern.of("0/1 * * * 1/1 ? 2020-2120");
		});
	}