Explain Spring Framework.

Spring is an open source framework that provides comprehensive infrastructure support for developing Java applications. It provides libraries of classes which make it easier to develop tasks such as transaction management, database integration, and web applications and create the help to address the complexity of the development of enterprise application.

Spring is a light weight inversion of control and aspect-oriented container framework.

• Lightweight. Spring is lightweight when it comes to API size and transparency. The basic version of spring framework is around 1MB and the processing overhead is also very minimal.
• Inversion of control (IoC). Loose coupling is achieved in spring using the technique Inversion of Control. The objects give their dependencies instead of creating or looking for dependent objects.
• Framework. Spring provides most of the core functionality and features, leaving rest of the coding to the developer.
• Aspect oriented (AOP). Spring supports Aspect-oriented programming and enables cohesive development by separating application business logic from system services.

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