That's a pretty open-ended question.
The *simplest* way to get started is to create a typical
Java webapp layout and put the required libraries into /WEB-INF/lib. You'd then make sure that Eclipse had those libraries on its compile path--but that's an
IDE question, not Struts. Try the
IDE forum for IDE-specific help.
Another option is to use
Maven and a Maven plugin; that may be too steep of a learning curve right now, though.