Spring 5 Design Patterns

How DI works and makes things easy for development and testing

Let's look at DI pattern implementation in your application. It makes things easy to understand, loosely coupled, and testable across the application. Suppose we have a simple application (something more complex than a Hello World example that you might make in your college classes). Every class is working together to perform some business task and help build business needs and expectations. That means that each class in the application has its measure of responsibility for a business task, together with other collaborating objects (its dependencies). Let's look at the following image. This dependency between the objects can create complexity and tight coupling between the dependent ...