Java Servlet Tutorial: Implementing an Address book example on JRun. Written by Luigi Arlotta.
Java Skyline: Learning Servlets: Organized set of resources for learning Java servlets on the Web - includes on-line try-it-out tutorial on HTTP get/post processing. Articles organized into introductory, topical and advanced tutorials.
Quick Guide to Apache Tomcat: Fast tutorial on configuring and using Apache Tomcat for desktop development of Java servlets and JavavServer Pages (JSP).
Servlet Essentials: Overview and tutorial - covers all topics including authentication and cookies.
Stepping Through Jakarta Struts: A quick intro to Struts (development framework for Java servlet applications), covering the necessary details to make it possible to build a simple one-page example containing an HTML form.
The Complete Apache Struts Tutorial: A complete reference of Jakarta Struts shows how to develop Struts applications using Ant and deploy on the JBoss application server. Many advance topics like Tiles, Struts Validation Framework, Java Script validations are covered in this tutorial.
The J2EE Tutorial: A beginner's guide to developing enterprise applications on the Java 2 Platform, Enterprise Edition SDK.