DAI: Redbook: Experience Java EE!
"Beginning Java developers will find valuable information in this e-book from IBM? Redbooks: "Experience Java EE! Using WebSphere? Application Server Community Edition 2.1." This essential reference explores core functions, security, Web services and messaging issues when developing a Java EE application.
Learn the basics of Java EE through a variety of methods and sources, then get hands-on with advanced topics and links. Gain practical knowledge with a real-life implementation."