public static String convert18To15(String idCard) {
		if (StrUtil.isNotBlank(idCard) && IdcardUtil.isValidCard18(idCard)) {
			return idCard.substring(0, 6) + idCard.substring(8, idCard.length() - 1);
		}
		return idCard;
	}
@Test
	public void convert18To15Test() {
		String idcard15 = IdcardUtil.convert18To15("150102198807303035");
		assertEquals(ID_15, idcard15);
	}