byte数组转成十六进制字符串

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/**
     * 数组转成十六进制字符串
     * @param byte[]
     * @return HexString
     */
    public static String toHexString1(byte[] b){
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < b.length; ++i){
            buffer.append(toHexString1(b[i]));
        }
        return buffer.toString();
    }
    public static String toHexString1(byte b){
        String s = Integer.toHexString(b & 0xFF);
        if (s.length() == 1){
            return "0" + s;
        }else{
            return s;
        }
    }