This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Welcome to the JavaRanch. I moved your post into its own topic as it has nothing to do with what was going on in the other topic.
As for Struts sessions, if you are using Struts 2, have a look at the Struts 2 FAQ. If you are using Struts 1, you would use the Session functionality built into the Servlet API (see HttpServletRequest and HttpSession)