Problem compiling servlet

I'm having trouble compiling a servlet the uses the org.apache.poi

library. These are the import statements I use:

import javax.servlet.*;

import javax.servlet.http.*;

import org.apache.poi.poifs.filesystem.POIFSFileSys

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.util.SheetReferences;

The jar file containing the POI library is called poi-2.5.1-final-20040804.jar

I'm compiling using javac directly, without any IDEs. What should my CLASSPATH environment variable contain to make sure the servlet libraries and the poi libraries are recognized, and do I need to restart the machine so that the changes can take effect? These are the contents of the CLASSPATH variable now:

.;C:\Archivos de programa\Java\jre1.5.0_05\lib\ext\QTJava.zip

these are some of the errors I get:

package javax.servlet does not exist

package org.apache.poi.poifs.filesystem does not exist

The servlet java file is inside the webapp directory:

C:\Archivos de programa\Apache Software Foundation\Tomcat 5.5\webapps\cerberus3\WEB-INF\classes\evenseg\eximport

Any help would be appreciated, thanks.

[1364 byte] By [luisjoseromeroa] at [2007-10-3 1:44:15]