public static byte[] decodeHex(String hexStr) {
		return decodeHex((CharSequence) hexStr);
	}
@Test
	public void decodeTest(){
		final String str = "e8c670380cb220095268f40221fc748fa6ac39d6e930e63c30da68bad97f885d";
		assertArrayEquals(HexUtil.decodeHex(str),
				HexUtil.decodeHex(str.toUpperCase()));
	}