The Model View Controller Pattern MVC Architecture and Frameworks Explained

Later frameworks for Java, such as Spring , continued the strong bond between Java and MVC. The UI must have a text field where the user can enter a search string and it might have a button to start the search. Finally it must have an area where the search results are displayed.

mvc programming

Controls are objects that mediate between boundaries and entities. A controller object often correspond to use cases scenario and often represented by a sequence diagram.

Example 4 – interactive contact forms

The MVC pattern needs all these components to be separated as different objects. For example, the Customer controller will handle all the interactions and inputs from the Customer View and update the database using the Customer Model. The same controller will be used to view the Customer data. The model doesn’t need to interact with the view or the controller. Instead, the controller would trigger the functions of the model.

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These events would execute once the user clicks on the buttons, depending on which button is clicked. In Java SE 7, there is the new functionality of try-with-resources blocks, mvc programmer that automatically clean and dispose of the resources. A similar one is being used here, otherwise I would have used a finally block, to manually call the .close() function.


The Smalltalk-80 environment also includes an “MVC Inspector,” a development tool for viewing the structure of a given model, view, and controller side-by-side. Reusability is higher with OOP, IFF you’ve designed it well or with the “unit of work” mentality. I have written db/logging/error handling classes that I just copy/paste into whatever project I’m working on and go about my business. Sure I have to tweak something here or there because of server/application specific variables like usernames/passwords/filenames/paths, but most of the time it’s ready to go out of the box. Unlike C#, in Java your class name and the file name, containing the class, must match for the programs, to run. So, if you want to continue with this article, you should name your application’s files, as I have . Or, you can create your own project and then edit the names of the classes and/or packages.

  • Now this would return the data, based on the same preceding stream that I drew.
  • So, that is why you can use this code in the Eclipse to build the GUI.
  • A model can be reused by multiple views that provides reusability of code.
  • Views force you to do almost all your logic in the controller.
  • T receives all the information it needs from the controller and it doesn’t need to interact with the business layer directly.
  • To work with these complex web applications developers use different design patterns to lay out their projects, to make the code less complex and easier to work with.
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