I have been trying to follow the model used in Chapter 8 of the Pro JSP
site design book. In that I mean separating the date entities, CRUD,
business logic, and action classes. My question is in doing so how could
you run a findByPrimaryKey select statement that then forwards to a jsp
depending on whether the select statement gets a NULL result or not.
The way I understand the concept in the auction example is that you model
the table structure in an entity class. Develop prepared sql statements
in a DAO class. Call the DAO using a business object class that is run by
an Action class. This has me a bit perplexed because I want to use this
separation but can't get a forward when I get a null result set because
it throws an error.