IOC, one of the most buzzing words in IT. I will describe its clear cut meaning with example in this article.

Formal Definition: IOC is an aspect of some software architecture designs in which the flow of control of a system is inverted in comparison to traditional programming.

Before discussing further, let me give you one example,

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Hope you guys have enjoyed previous article, MultiActionController Example. Now, let’s move on to UrlFilenameViewController. It transforms the virtual path of a URL into a view name and returns the view, that’s it. It is useful when you don’t need any logical operation on request and simply wants to redirect to some resource. For example, each site has ‘Contact Us’, ‘About Us’ pages. To map those pages UrlFilenameViewController is a good choice. Let’s see the example.

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MultiActionController is one of the types of Controllers in Spring. It extends AbstractController. (Somewhat similar to DispatchAction in Struts)  Why MultiActionController?: It aggregates multiple request handling methods into single controller, so related functionality can be kept together easily.
NOTE:To reduce complexity, I have added business logic in Controller. Later on I will republish this example as per MVC2 standards. Let’s go through the flow of application.

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