How to build local server and handle with client?

[kidozh]

I am wondering how to build a local web service.
When I was successfully run the command: mvn tomcat:run in jplag/jplag.webService , I found nothing but 404 in localhost:8080/JPlagService/service.And I don't know how to build a client that can connect with the local server.
Could you please tell us something wrong that I done?A detail procedure to build the server and client is much better if possible.

Thanks a lot for your attention.