JAX-WS

The JAX-WS set of packages and classes is the successor to the Java API for XML-based RPC (JAX-RPC), a technology for making remote procedure calls from one Java object to another over the Internet.
The following codes are  on JDK6 7 JDK8.
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//a Service Endpoint Interface
package com.jaxws;
import javax.jws.*;
import javax.jws.soap.*;
import javax.jws.soap.SOAPBinding.*;

@WebService
@SOAPBinding(style = Style.RPC)
public interface TestServer {
    @WebMethod double getTestValue(double input);
    @WebMethod String getTime();
}
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//a Service Implemmentation Bean
package com.jaxws;
import java.util.*;
import javax.jws.*;

@WebService(endpointInterface = "com.jaxws.TestServer")
public class TestServerImpl implements TestServer {

    @Override
    public double getTestValue(double input) {
        return Math.ceil(input);
    }

    @Override
    public String getTime() {
        Date now = new Date();
        return now.toString();
    }
}
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// a Service Publisher
 package com.jaxws;
import java.awt.Desktop;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.xml.ws.*;

public class TestServerPublisher {

    public static void main(String[] arguments) {
        try {
            TestServerImpl tws = new TestServerImpl();
            Endpoint.publish("http://127.0.0.1:5665/service", tws);
            //Open a browser and load the address http://127.0.0.1:5665/service?wsdl
            Desktop d;
            d = Desktop.getDesktop();
            URI uri = new URI("http://127.0.0.1:5665/service?wsdl");
            d.browse(uri);
        } catch (URISyntaxException ex) {
            ...
        } catch (IOException ex) {
            ...
        }
      
    }
}

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//a Web Service Client
package com.test;
import com.jaxws.TestServer;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;

class TestClient{
    public static void main(String[] arguments) throws Exception {
        URL url = new URL("http://127.0.0.1:5665/service?wsdl");
        QName qname = new QName("http://jaxws.com/","TestServerImplService");

 Service service = Service.create(url, qname);
 TestServer tws = service.getPort(TestServer.class);

 System.out.println(tws.getTime());
 System.out.println(tws.getTestValue(135D));
 }
}
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Tools:
wsimport Ref：  https://jax-ws.java.net/jax-ws-ea3/docs/wsimport.html
wsimport -verbose -p com.test.ws -keep http://127.0.0.1:5665/service?wsdl
wsgen -verbose -keep -cp "." -wsdl com.jaxws.TestServerImpl

Endpoint.publish is on com.sun.net.httpserver. https://blogs.oracle.com/michaelmcm/entry/http_server_api_in_java