JWS used to be a simple deployment mechanism for POJOs that was supported by Axis 1.x. (I can't find a mention of it in the Axis 2.x docs, so I'm assuming that it has been dropped. Axis 2 has a better mechanism for deploying POJOs, though.)
Essentially it enabled you to drop a Java source file (with a .jws extension) into the Axis web app directory, and its public methods would be treated as web services. Some more information -and a mention of the significant drawbacks of this method (no WSDL, no handlers, no WS-Security, ...)- can be found here.