What is Container in Spring framework ?

 In Spring Framework, a container is responsible for managing the lifecycle of Java objects, also known as beans. The container creates instances of beans, configures them based on the configuration metadata provided, and manages their lifecycle, including initialization, dependency injection, and destruction.

In the context of Spring Framework, a container is often referred to as the Spring container or the Inversion of Control (IoC) container. There are two types of containers in Spring Framework:

1. BeanFactory: This is the simplest container in Spring Framework and provides basic support for dependency injection and lifecycle management of beans.

2. ApplicationContext: This is a more advanced container that extends the functionality of the BeanFactory with additional features such as support for internationalization, message resolution, and event publication.

The Spring container uses dependency injection to manage the dependencies between beans. Dependency injection is a design pattern that separates the creation of objects from their dependencies, allowing for greater modularity and easier testing. The container creates objects and injects their dependencies, based on the configuration metadata provided.

Overall, the Spring container provides a powerful mechanism for managing the lifecycle of Java objects, simplifying the development of complex applications and improving their modularity and testability.