What is Dependency Injection and Inversion of Control in Spring Framework?

Question

\"Dependency Injection\" and \"Inversion of Control\" are often mentioned as the primary advantages of using the Spring framework for developing Web frameworks

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Answer 1

Inversion Of Control (IOC):

IoC is a design pattern that describes inverting the flow of control in a system, so execution flow is not controlled by a central piece of code. This means that components should only depend on abstractions of other components and are not be responsible for handling the creation of dependent objects. Instead, object instances are supplied at runtime by an IoC container through Dependency Injection (DI).

IoC enables better software design that facilitates reuse, loose coupling, and easy testing of software components.

Dependency Injection (DI):

DI is a technique for passing dependencies into an object’s constructor. If the object has been loaded from the container, then its dependencies will be automatically supplied by the container. This allows you to consume a dependency without having to manually create an instance. This reduces coupling and gives you greater control over the lifetime of object instances.

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