Dependency Injection in Practice
Learn to use `@Autowired` and constructor injection for managing dependencies within your application.
DI in Practice: Intro
Welcome to Dependency Injection in Practice! In Spring Boot, we don't manually create objects. Instead, Spring handles this for us, 'injecting' what an object needs.
This lesson focuses on the two primary ways to ask Spring to inject dependencies into your components: Field Injection and Constructor Injection.
What's a Dependency?
Think of dependencies as the 'ingredients' an object needs to do its job. For example, a CoffeeMaker might need a WaterHeater and a CoffeeBeanGrinder.
- Dependency: An object that another object relies on.
- Injection: Spring providing these required objects automatically.
This keeps your code cleaner and easier to test!
All lessons in this course
- Understanding Spring IoC Container
- Dependency Injection in Practice
- Externalizing Application Properties
- Bean Scopes and Lifecycle Management