Consuming SOAP Web Service

public String getCitiesByCountry(String countryName) throws MalformedURLException, IOException {
 
    //Code to make a webservice HTTP request
    String responseString = "";
    String outputString = "";
    String wsURL = "https://www.webservicex.com/globalweather.asmx";// Endpoint of the webservice to be consumed
    URL url = new URL(wsURL);
    URLConnection connection = url.openConnection();
    HttpURLConnection httpConn = (HttpURLConnection)connection;
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    String xmlInput = 
        "<soap:Envelope xmlns:xsi=\"https://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"https://www.w3.org/2001/XMLSchema\"         xmlns:soap=\"https://schemas.xmlsoap.org/soap/envelope/\">
          <soap:Body>
            <GetCitiesByCountry xmlns=\"https://www.webserviceX.NET\">
              <CountryName>" + countryName + "</CountryName>
            </GetCitiesByCountry>
          </soap:Body>
        </soap:Envelope>"; //entire SOAP Request

    byte[] buffer = new byte[xmlInput.length()];
    buffer = xmlInput.getBytes();
    bout.write(buffer);
    byte[] b = bout.toByteArray();
    String SOAPAction = "https://www.webserviceX.NET/GetCitiesByCountry"; // SOAP action of the webservice to be consumed
    // Set the appropriate HTTP parameters.
    httpConn.setRequestProperty("Content-Length",
    String.valueOf(b.length));
    httpConn.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
    httpConn.setRequestProperty("SOAPAction", SOAPAction);
    httpConn.setRequestMethod("POST");
    httpConn.setDoOutput(true);
    httpConn.setDoInput(true);
    OutputStream out = httpConn.getOutputStream();
    //Write the content of the request to the outputstream of the HTTP Connection.
    out.write(b);
    out.close();
    //Ready with sending the request.
     
    //Read the response.
    InputStreamReader isr = null;
    if (httpConn.getResponseCode() == 200) {
      isr = new InputStreamReader(httpConn.getInputStream());
    } else {
      isr = new InputStreamReader(httpConn.getErrorStream());
    }
    
    BufferedReader in = new BufferedReader(isr);
     
    //Write the SOAP message response to a String.
    while ((responseString = in.readLine()) != null) {
        outputString = outputString + responseString;
    }
    //Parse the String output to a org.w3c.dom.Document and be able to reach every node with the org.w3c.dom API.
    Document document = parseXmlFile(outputString);
    NodeList nodeLst = document.getElementsByTagName("GetCitiesByCountryResult"); // TagName of the element to be retrieved
    String elementValue = nodeLst.item(0).getTextContent();
    System.out.println(elementValue);
    
    return elementValue;
}

public Document parseXmlFile(String in) {
    try {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        InputSource is = new InputSource(new StringReader(in));
        return db.parse(is);
    } catch (ParserConfigurationException e) {
        throw new RuntimeException(e);
    } catch (SAXException e) {
        throw new RuntimeException(e);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}