Method hexToByteArray

src/main/java/Util.java:77–93

hex字符串转byte数组 @param hex 待转换的Hex字符串 @return 转换后的byte数组结果

(String hex)

     * @return  转换后的byte数组结果
     */
    public static byte[] hexToByteArray(String hex){
        int hexlen = hex.length();
        byte[] result;
        if (hexlen % 2 == 1){
            hexlen++;
            result = new byte[(hexlen/2)];
            hex="0"+hex;
        }else {
            result = new byte[(hexlen/2)];
        }
        int j=0;
        for (int i = 0; i < hexlen; i+=2){
            result[j]=(byte)Integer.parseInt(hex.substring(i,i+2),16);
            j++;
        }
        return result;
    }

    public static String join(String[] strings, String sep, String prefix, String suffix) {
        final StringBuilder sb = new StringBuilder();