code: package systemstesting;
  
  import javax.net.ssl.HttpsURLConnection;
  import java.io.BufferedReader;
  import java.io.DataOutputStream;
  import java.io.InputStreamReader;
  import java.net.HttpURLConnection;
  import java.net.URL;
  import org.jsoup.Jsoup;
  import org.jsoup.nodes.Document;
  import org.jsoup.select.Elements;
  
  public class HttpURLConnectionExample {
  
      public static void main(String[] args) throws Exception {
          HttpURLConnectionExample obj = new HttpURLConnectionExample();
          //obj.sendGet();
          obj.sendPost();
      }
  
      private void sendGet() throws Exception {
  
          String question = "What is the capital of Cameroon";
          String url = "http://start.csail.mit.edu/justanswer.php?query="+question;
  
          Document doc = Jsoup.connect(url).get();
          Elements div = doc.select("p span a");
          System.out.println(div.get(0).text());
      }
  
      private void sendPost() throws Exception {
  
          String url = "http://localhost:8080/startquestionansweringwithtextquestion";
          HttpURLConnection httpClient = (HttpURLConnection) new URL(url).openConnection();
  
          //add reuqest header
          httpClient.setRequestMethod("POST");
          //httpClient.setRequestProperty("User-Agent", "Mozilla/5.0");
          httpClient.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
  
          String urlParameters = "question=What is the real name of Carling?";
  
          // Send post request
          httpClient.setDoOutput(true);
          try (DataOutputStream wr = new DataOutputStream(httpClient.getOutputStream())) {
              wr.writeBytes(urlParameters);
              wr.flush();
          }
  
          int responseCode = httpClient.getResponseCode();
          System.out.println("\nSending 'POST' request to URL : " + url);
          System.out.println("Post parameters : " + urlParameters);
          System.out.println("Response Code : " + responseCode);
  
          try (BufferedReader in = new BufferedReader(
                  new InputStreamReader(httpClient.getInputStream()))) {
  
              String line;
              StringBuilder response = new StringBuilder();
  
              while ((line = in.readLine()) != null) {
                  response.append(line);
              }
  
              //print result
              System.out.println(response.toString());
  
          }
  
      }
  
  }
  