How to create installer for web application to run on both Windows and Linux? I need no more than extact some jar, jsp and xml files into a chosen directory. (Web server and database should be already installed, when our app is installed) There can be two output files - one for Windows, one for Linux.
http://izpack.org/ is a fully-fledged cross-platform java installer-generator, and it's awesome.
But I'm not sure you need that exactly ..
I think, maybe, you just want a .war file? (i.e. a web application archive)
Here's an old article about war files: