Developing Web Applications has never been easier with the new generation Java open source tools. You'll be amazed at how fast you can have a ready-for-production AJAX web application up and running from scratch. In this book you'll learn OpenXava, JPA, Eclipse, PostgreSQL, JUnit, HtmlUnit, Hibernate Validator framework, Liferay, etc. More importantly, you're going to learn techniques to solve both common and advanced cases that you'll face developing business applications.