The frameworks covered in this book are Spring, Hibernate, JDO, EJB 3 and iBATIS. However, I'd like to think that POJOs in Action takes a different approach to most books on frameworks, which typically take the perspective of here is the framework and this is what you can do with it
POJOs in Action starts with designing an application and then shows how to use these frameworks to solve specific problems. Moreover, rather than blindly advocating the use of a particular framework it describes the framework's benefits and drawbacks and when and when not to use it.
I hope this helps.
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