Not just another gift catalog design patterns, the authors broaden the scope by discussing ways to choose design patterns when building an enterprise application from scratch, take a closer look at the real world that the sacrifice of Java developers should consider when architecting their application design. J2EE Patterns offers a range wide from five regions of the developer company faced a problem: Maintenance (Extensibility) Performance (System Scalability) Data Modeling (Business Object Modeling) Transactions (process Modeling) Messaging (Interoperability) And with the heart that the balance between theory and practice, J2EE Design Patterns will give developers New to Java enterprise development arena a solid understanding of how to approach a variety of architectural and procedural problems, and will give experienced J2EE pros an opportunity to expand and enhance the existing experience.