What are the benefits of using Spring Dependency Injection?

What are the benefits of using Spring Dependency Injection?

Spring Dependency Injection (DI) helps in creating loosely coupled applications, making them easier to manage and test.

Can you explain how it improves testability?

Sure! With DI, you can easily swap out dependencies with mocks or stubs, allowing for more effective unit testing.

What about its impact on code maintainability?

It enhances maintainability by reducing the dependencies between components, making it easier to modify or replace them.

Are there any performance concerns with using DI?

Generally, the performance overhead is minimal, but it's important to manage the lifecycle of beans properly to avoid issues.

Can you give an example of a real-world application using Spring DI?

Many enterprise applications use Spring DI, such as e-commerce platforms, where it helps manage complex service interactions.