java 生成数字指纹 md5到Base64

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废话少说，上代码：

public String generateToken(){
        String tokenString = System.currentTimeMillis() + "" + new Random().nextInt(99999);
        try {
            MessageDigest mDigest = MessageDigest.getInstance("md5");
            byte[] md5 = mDigest.digest(tokenString.getBytes());
            BASE64Encoder encoder = new BASE64Encoder();
            return encoder.encode(md5);
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return "";
    }