/**
     * 將指定byte數(shù)組以16進(jìn)制的形式打印到控制臺
     * 
     * @param hint
     *            String
     * @param b
     *            byte[]
     * @return void
     */
    public static void printHexString(String hint, byte[] b)
    {
        System.out.print(hint);
        for (int i = 0; i < b.length; i++)
        {
            String hex = Integer.toHexString(b[i] & 0xFF);
            if (hex.length() == 1)
            {
                hex = '0' + hex;
            }
            System.out.print(hex.toUpperCase() + " ");
        }
        System.out.println("");
    }