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J2ee design pattern - practical implementation question

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I have following design requirement
Page 1 - Save Category (it has name, description, status)
Page 2 - List Product (List All the Products with some search condition)
Page 3 - List Category (List All the Categories with some search condition)

From Page 1 , on hitting next, should go to Page 2, after saving Category
From Page 1, on hitting back, should go to Page 3, after saving category

I am using following pattern
Page1.jsp --> ApplicationControllerServlet - CommandFactory - SaveCategoryCommand - CategoryDAO.

I am not sure what pattern to user for Listing the Category and Product.
What I can think of currently is
I can add two more commands like ListCategoryCommand & ListProductCommand. But how will I link the various Command.

Any Suggesstion will be most welcome.
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