public static byte[] hex2byte(String hex) {
		byte[] ret = new byte[8];
		byte[] tmp = hex.getBytes();
		for (int i = 0; i < 8; i++) {
			ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);
		}
		return ret;
	}
public static byte [ ] hex2byte ( String hex ) { byte [ ] ret = new byte [ 8 ] ; byte [ ] tmp = hex . getBytes ( ) ; for ( int i = 0 ; i < 8 ; i ++ ) { ret [ i ] = uniteBytes ( tmp [ i * 2 ] , tmp [ i * 2 + 1 ] ) ; } return ret ; }
十六进制字符串转化为2进制

@param hex
@return