The Open Source Project castor is a very helpfull Tool for 
 mapping data from a database into Java-Objects. Overwrite
 the getFormModel() Method in your Action to get a Bean
 from the Database and commit it somewhere in perform().
 
 I use a special Bean which holds the Business-Model in a
java.lang.Object attribute and HashMap. The hashmap can
also manipulated with JXPath and XPath statements and can 
 hold very helpfull navigation and non-business-model information.
 
I think this will help u 



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