How to import a jar file in JSP

How to import a Jar file in JSP Page.
please reply its very urgent!

Hey I am facing a similar problem:
I have this jar file lbswebservice.jar that I have to use for my application.
I added it to the classpath, I copied it in my WEB-INF/lib folder, but when I try to access classes in this package, it doesnt work.
For example the jar contains the package com.blipsystems.lbs.ws.messages.* ; that contains different classes, like the Campaign class.
I tried to use this class (just to create an object) in different context (through jsp, or just through java test classes), but it never works, i get the error: com.blipsystems.lbs.ws.messages.Campaign cannot be resolved to a type
I am a bit desperate here...

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