public static void post_example() throws IOException
    {
        CloseableHttpClient client = HttpClients.createDefault();
        HttpPost post = new HttpPost("http://httpbin.org/post");

        ArrayList<NameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("param-1", "12345"));
        params.add(new BasicNameValuePair("param-2", "Hello!"));

        post.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

        HttpResponse response = client.execute(post);
        HttpEntity entity = response.getEntity();

        entity.writeTo(System.out);

        client.close();
    }