This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
The servlet API describes all the rules that cover this sort of question - you should download a copy from java.sun.com The answer is yes, classes in a jar file in the yourapplication/WEB-INF/lib directory will be picked up just like the individual class files in yourapplication/WEB-INF/classes directory would. It does have to be type ".jar" - ".zip" will not work. Bill
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