Create JWS from PEM

Pem2Jws.java

    private String readPublicKey() throws Exception {
        val key = new String(this.getClass().getResourceAsStream("/publicKey.pem").readAllBytes())
                .replace("-----BEGIN PUBLIC KEY-----", "")
                .replaceAll(System.lineSeparator(), "")
                .replace("-----END PUBLIC KEY-----", "");
        val encoded = Base64.getDecoder().decode(key);
        val keySpec = new X509EncodedKeySpec(encoded);
        val keyFactory = KeyFactory.getInstance("RSA");
        val jsonWebKey = PublicJsonWebKey.Factory.newPublicJwk(keyFactory.generatePublic(keySpec));
        val jsonWebKeySet = new JsonWebKeySet(jsonWebKey);
        return jsonWebKeySet.toJson();
    }