Presentation Tier Refactorings
The refactorings in this section apply to the presentation tier.
Introduce a Controller
Control logic is scattered throughout the application, typically duplicated in multiple Java Server Page (JSP) views.
Extract control logic into one or more controller classes that serve as the initial contact point for handling a client request.
Figure 5.1. Introduce a controller
Motivation
Control code that is duplicated in multiple JSPs also needs to be maintained in each JSP. Extracting this code into one or more centralized controller class improves the modularity, reusability, and maintainability of the application.
Mechanics ...
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