问以文本格式存储KeyStoreGenerator生成的私钥(例如，vault store) - Java

EN

public KeyGenerator(int keylength) throws NoSuchAlgorithmException, NoSuchProviderException {
    this.keyGen = KeyPairGenerator.getInstance("RSA");
    this.keyGen.initialize(keylength);
}

public void createKeys() {
    this.pair = this.keyGen.generateKeyPair();
    this.privateKey = pair.getPrivate();
    this.publicKey = pair.getPublic();
}

public PrivateKey getPrivateKey() {
    return this.privateKey;
}

public PublicKey getPublicKey() {
    return this.publicKey;
}

public void writeToFile(String path, byte[] key) throws IOException {
    File f = new File(path);
    f.getParentFile().mkdirs();

    FileOutputStream fos = new FileOutputStream(f);
    fos.write(key);
    fos.flush();
    fos.close();
}

public static void main(String[] args) {
    KeyGenerator kg;
    try {
        kg = new KeyGenerator(2048);
        kg.createKeys();
        System.out.println(kg.getPublicKey().getFormat()); // this prints out X.509

        System.out.println(kg.getPrivateKey().getFormat()); // this prints out PKCS#8

        kg.writeToFile(PUBLIC_KEY_PATH, kg.getPublicKey().getEncoded());
        kg.writeToFile(PRIVATE_KEY_PATH, kg.getPrivateKey().getEncoded());
    } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
        System.err.println(e.getMessage());
    } catch (IOException e) {
        System.err.println(e.getMessage());
    }

}