JBoss supports JAX-WS out of the box. There is not much configuration files needed, only a servlet-mapping in the web.xml. This is how the web-service java file looks like:

package com.swayam.demo.webservice;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
/**
 *
 * @author paawak
 */
@WebService()
public class UserService {
    /**
     * Web service operation
     */
    @WebMethod(operationName = "addUser")
    public Boolean addUser(@WebParam(name = "userName")
    String userName) {
        System.out.println("add user");
        return Boolean.TRUE;
    }
}

Its a POJO with a @WebService annotation. All you have to do is map this as a servlet in the desired context. Though this is not a servlet per-se, the JBoss web container does the rest. This is how the web.xml looks like:



    
        UserService
        com.swayam.demo.webservice.UserService
        1
        
    
        UserService
        /UserService
    
    
        
            30
        
    
    
        index.jsp
        
    

After deploying, you can access the webservice by http://localhost:8080/JBossWebServiceTest/UserService?wsdl.
You can find the sources https://github.com/paawak/blog/tree/master/code/JBossWebServiceTest
And the war https://github.com/paawak/blog/tree/master/code/JBossWebServiceTest/dist