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.
If you want to make the logging statements in the example work, just put log4j.jar in your WEB-INF/lib file, provide a log4j.properties file that defines appenders for the examples classes, and the logging statements will start outputting to those appenders. Apache Commons logging will sense the presence of log4j as your underlying logging system.