Example

        //authentcitaion
        CredentialsProvider provider;
        {
            String user = "alsjdfljksdflkjsdlkfj";
            String pass = "sldfjlksdjflksjdfsdfs";
            provider = new BasicCredentialsProvider();
            UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(user, pass);
            provider.setCredentials(AuthScope.ANY, credentials);
        }

        //client
        CloseableHttpClient client = HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();

        //post (request)
        HttpPost httpPost = new HttpPost("http://foobar");


        //request headers
        {
            httpPost.setHeader("Authorization", "Basic lsdkjflskdjflskjdflksdf");
        }

        //request form
        {
            List<NameValuePair> params = new ArrayList<>();
            params.add(new BasicNameValuePair("username", "sdfsdfsdf"));
            params.add(new BasicNameValuePair("password", "asdfsdfsdf"));
            params.add(new BasicNameValuePair("grant_type", "password"));
            httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
        }

        //execute the request
        CloseableHttpResponse response = client.execute(httpPost);
        if (response.getStatusLine().getStatusCode() == 200) {
            InputStream is = response.getEntity().getContent();
            String content = IOUtils.toString(is, "UTF-8");
            System.out.println(content);
        } else {
            System.out.println(response.getStatusLine().getStatusCode());
        }
        client.close();