This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
That depends on your application.what are you interested to do with those values?
As far i am concerned, its better to set these parameters in ServletRequest if you just need to respond.And if you need to store it in the database better to go with plain old java objects.Its good architecture DAO data access object