如何从PFX证书创建JWK？

KeyStore keyStore = KeyStore.getInstance("PKCS12");
InputStream inputStream = new FileInputStream("path/to/pfx/certificate.pfx");
String password = "password";
keyStore.load(inputStream, password.toCharArray());

String alias = keyStore.aliases().nextElement();
PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
X509Certificate certificate = (X509Certificate) keyStore.getCertificate(alias);

JWK jwk = JWKBuilder.create()
        .keyType(KeyType.RSA)
        .keyUse(KeyUse.SIGNATURE)
        .algorithm(JWSAlgorithm.RS256)
        .privateKey(privateKey)
        .certificateChain(Collections.singletonList(certificate))
        .build();

String jwkJson = jwk.toJSONString();