If you were using Spring Webservices you could configure Spring to generate this for you at runtime. As this is basically a question on how to write a WSDL it is not Spring specific so I am going to move this thread to the webservices forum.
or, I believe if you are deploying on an app server that the app server automatically generates the wsdl when you deploy.
In Spring Web Services, not the link that you posted. But the Web Service's project from Spring there is a bean you can create that will generate a wsdl file, run a test against that spring config and it generate a wsdl that you can then copy and change to your needs. But again that is just from the Spring Web Services project which is NOT jax-ws.
Hope that helps without completely knowing the answer.