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Spring is the most popular open source Java application Framework. It combines all the industry-standard frameworks (for e.g. Struts and Hibernate) and approaches into one bundle. By provides Dependency Injection, Aspect Oriented Programming and support for unit testing, the framework gives developers time to work on main business logic rather than worrying about non-application code. Spring makes application development faster and increases the productivity of developers.
The Spring Web MVC framework is designed around a Dispatcher Servlet that dispatches requests to handlers, with configurable handler mappings, view resolution, locale and theme resolution as well as support for upload files. It allows users to use any object as a command or form object, with no need to implement a framework-specific interface or base class. Data binding in Spring is highly flexible: for e.g. it treats type mismatches as validation errors that can be evaluated by the application and not as system errors.
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