an open-source project for creating a component model for J2EE
NetUI: An annotation-driven web application programming framework that is built atop Struts. NetUI centralizes navigation Logic, state, metadata, and exception handling in a single encapsulated and reusable Page Flow Controller class. In addition, NetUI provides a set of JSP tags for rendering HTML / XHTML and higher-level UI constructs such as data grids and trees and has first-class integration with JavaServer Faces and Struts.
Controls: A lightweight, metadata-driven component framework for building that reduces the complexity of being a client of enterprise resources. Controls provide a unified client Abstraction that can be implemented to access a diverse set of enterprise resources using a single configuration model.
Web Service Metadata (WSM): An implementation of JSR 181 which standardizes a simplified, annotation-driven model for building Java web services.
In addition, Beehive includes a set of system controls that are abstractions for low-level J2EE resource APIs such as EJB, JMS, JDBC, and web services. you can free download Apache Beehive for Unix 1.0.2 now.