trying to build Lucene from source: can't find packages

[Ilya Zavorin]

I am trying to rebuild Lucene 3.4.0 from its source distribution. Using 
Netbeans 7.0.1. I've added all the JARs that came with the source, but am still 
getting build errors for one file:

FormBasedXmlQueryDemo.java in contrib\xml-query-parser\src\demo\java:

Can't find these packages:

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

Do I need to download these JARs from somewhere? Any specific version(s) I need 
to get?

Thanks,

Ilya Zavorin