Which packages knowledge are require before starting JSP and Servlets?

[kkji]

Which packages knowledge are require before starting JSP and Servlets?

[Rameshwar Soni]

I don't think that there is a prerequisite to first study packages which are used in JSP and Servlets, you can directly start with JSP and Servlets and simultaneously
you would come to know about the classes which are being used. The packages which would be used also depends upon the type of program or project you
are making. Anyways i would list out the basic packages which are normally used in JSP and Servlets
(1) java.io package
(2) javax.servlet package
(3) javax.servlet.http package.

[Tolls]

And start with Servlets and, when you can write most anything in that, then use JSPs.
Don't start with JSPs as you'll fall into the trap I see here all the time of people trying to write all their code in a JSP page.