John Carnell & Jeff Linwood 
Professional Struts Applications [PDF ebook] 
Building Web Sites with Struts ObjectRelational Bridge, Lucene, and Velocity

Building maintainable and extensible web applications requires significant design and planning before even a single line of code can be written. But when you leverage development frameworks, you can overcome the many challenges of web-based development. This book maps out the Jakarta Struts framework, to help you solve everyday web application development problems. This book concentrates on using Struts to develop the core architecture of a web application, and using other Jakarta projects to create a fully open source web application. Included are Object-Relational Bridge, Lucene, Velocity, and ANT.