Tomcat上的JAX-WS Web服务-无法实例化

Question

I would like to know how to handle this situation. what i have done is i have followed the tutorial http://www.mkyong.com/webservices/jax-ws/deploy-jax-ws-web-services-on-tomcat-ssl-connection/ to create a similar secured web service, i am able to achieve it, but i have a error ,

ml.ws.api.server.InstanceResolver.createNewInstance(InstanceResolver.java:222) at com.sun.xml.ws.api.server.InstanceResolver.createDefault(InstanceResolver.java:184) at com.sun.xml.ws.server.EndpointFactory.create(EndpointFactory.java:209)

the error is because i am instantiating the webservice for example from this example the HelloWorldImpl class has a constructor with arguments to set a parameter from a class. I understand , only default constructor is possible in Jax-ws web service, but in that case i want to know how to handle this?

say like

package com.mkyong.ws;

import javax.jws.WebService;

//Service Implementation Bean

@WebService(endpointInterface = "com.mkyong.ws.HelloWorld")
public class HelloWorldImpl implements HelloWorld{
private ABC abc;
 public HelloWorldImpl (ABC abc)
{
    this.abc = abc;
}
    @Override
    public String getHelloWorldAsString() {
        return "Hello World JAX-WS";
    }

// and i use this abc in one of the methods 
}

Answer 1

This is not the correct notation for a constructor:

public void HelloWorldImpl (ABC abc) {
    this.abc = abc;
}

Should be:

public HelloWorldImpl (ABC abc) {
    this.abc = abc;
}

Update: So why not add a default constructor?

package com.mkyong.ws;

import javax.jws.WebService;

//Service Implementation Bean

@WebService(endpointInterface = "com.mkyong.ws.HelloWorld")
public class HelloWorldImpl implements HelloWorld {
private ABC abc;

public HelloWorldImpl() { 
    this("Hello World JAX-WS");
}

 public HelloWorldImpl (ABC abc)
{
    this.abc = abc;
}
    @Override
    public String getHelloWorldAsString() {
        return this.getAbc();
    }

// and i use this abc in one of the methods 
}

Answer 2

I think you can control how the HelloWorldImpl gets created by using: @InstanceResolverAnnotation

I wasn't able to find any good example, but here is one link that uses this annotation: http://blog.vinodsingh.com/2008/12/let-spring-load-service-class-for-jax.html

The idea is that the class specified as the Value for this Annotation, will be used to create the Instance of HelloWorld WebService.