Web application and web services

[Sabine El Rassy]

Hello,

I have an existing web application using tomcat 7 and JQueries. I need to implement web services to the application with minimum of code change.
I've read about web services and figured out that I can use JAVA-WS with a bottum/up approach and use a wsgen tool. I'm not sure if that's correct so if anyone can give his opinion about it I'd be grateful.
Is there anyway to do a mapping between the applet and web services? or what should I do?

Thanks

[Sabine El Rassy]

thank you for your response, but can you tell me why I should use JAVA-WS with bottum/up approach and not top/down appraoch? and why JAVA-WS wsgen over JAVA RPC style?
I don't know how to justify my choice of the technology
Thanks