Refactor the code using JAX-RS

I'm starting in the programming world and have to refactor a routine using another library. The routine uses the apache lib to do Http requests org.apache.http.* , I have to refactor using Jax-RS.

Here is the example of the routine I have to rewrite:

final SSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(
            new BBRSocketFactory(config).getContext());
    try (final CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslSocketFactory)
            .build()) {
        final HttpPost request = new HttpPost(config.getAmbiente().getUrl());
        request.setHeader("Content-Type", "application/pkcs7-signature");
        request.setEntity(new StringEntity(dadoEntradaAssinadoBase64));

        final HttpResponse response = httpClient.execute(request);
        System.out.println("Response status: " + response.getStatusLine().getStatusCode());
        final String stringResposta = IOUtils.toString(response.getEntity().getContent(), StandardCharsets.UTF_8);
        System.out.println("Resposta string: " + stringResposta);

Questions:

• What is the equivalent lib / Documentation.
• What are the corresponding methods.

Could someone help me with the direction of how to do it, or even with some example?