public static String digitToChinese(Number n) {
		if (null == n) {
			n = 0;
		}
		return NumberChineseFormatter.format(n.doubleValue(), true, true);
	}
@Test
	public void issue3662Test() {
		String s = Convert.digitToChinese(0);
		assertEquals("零元整", s);

		s = Convert.digitToChinese(null);
		assertEquals("零元整", s);
	}