import java.util.Vector;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlrpc.XmlRpcClient;

public class XMLRPCTestClient {
    private static final String serverAddress = 
	"http://localhost:8080/lol/remoteapi";
    private static Log log = LogFactory.getLog(XMLRPCTestClient.class);
    
    /** Creates a new instance of XMLRPCTestClient */
    public XMLRPCTestClient(String address) {
        try {
            XmlRpcClient xmlrpc = new XmlRpcClient(address);

            Vector params = new Vector();
            params.addElement("Hello World! Hello!");

            try {
                // this method returns a string
                String result = (String) xmlrpc.execute("echo.echo", params);
                System.out.println(result);
            } catch (Exception e) {
                log.error("The remote procedure call failed.", e);
            }
        } catch (java.net.MalformedURLException mue) {
            log.error(
                "The address given for the XML-RPC interface is bad: " + address);
        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        XMLRPCTestClient xmlRPCTestClient = new XMLRPCTestClient(
            serverAddress);
    }
}

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlrpc.XmlRpcServer;

public class XmlRpcServlet extends HttpServlet {
    public class EchoHandler {
        public String echo(String input) {
            return input;
        }
    }
	
    private XmlRpcServer server = new XmlRpcServer();

    private static Log log = LogFactory.getLog(XmlRpcServlet.class);

	@Override
	public void init(ServletConfig config) throws ServletException {
        server.addHandler("echo", new EchoHandler());
	}

	@Override
	protected void doGet(HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
	}

	@Override
	protected void doPost(HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException {
        byte[] result = server.execute(request.getInputStream());
        
        response.setContentType("text/xml");
        response.setContentLength(result.length);
        
        OutputStream output = response.getOutputStream();
        output.write(result);
        output.flush();
    }
}

  <servlet>
    <servlet-name>XmlRpcServlet</servlet-name>
    <servlet-class>XmlRpcServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>XmlRpcServlet</servlet-name>
    <url-pattern>/remoteapi</url-pattern>        
  </servlet-mapping>