Test a web service client using JAX-WS - api

Question

There is an api called "HelloWorld" on the link shown in code below. How can I call this api using the code below. The api takes no parameters.
The service already exists on the url shown. What do I need to add to the code below:
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;
public class apiHelloWorld {
public static void main(String[] args) throws Exception {
URL url = new URL("http://project.url.com/service.asmx?wsdl");
}
}

Answer 1

Your URL suggest that you are pointing to wsdl document, not the actual service. Most likely your service is under the same URL but without ?wsdl suffic).
That being said calling SOAP web service using plain URL class requires few extra steps. But it's absolutely possible, after all this is a plain HTTP protocol.
You need a SOAP request in XML format, including SOAP Envelope. This might be the most complex part (example taken from: Sending a SOAP request to a Web Service via URLConnection):
String soapXml = //...;
java.net.URLConnection conn = new URL("http://project.url.com/service.asmx").openConnection();
conn.setRequestProperty("SOAPAction", "");
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(soapXml);
wr.flush();
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
By reading rd you can fetch the response.