What is Spring Framework? Why is it needed?

Spring Framework is a powerful and widely used framework for developing enterprise applications in Java. It provides infrastructure for creating applications using the principles of Inversion of Control (IoC) and Dependency Injection (DI), which simplifies dependency management between components.

Main tasks of Spring:

• Simplifying configuration and lifecycle management of objects.
• Ensuring modularity and testability of code.
• Supporting various technologies: transactions, security, database access, web development (Spring MVC).

Spring is needed so that developers can focus on business logic rather than infrastructural details, significantly speeding up and simplifying the development process of complex applications.