This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can put them anywhere you want, as long as you make sure they go to the place you need them to be when you build your deployable web application.
Yes, Actually we don't even need to place them in developement environment, if we can directly place them in production environment at right place, because they are being used only at the time execution.