Constructor Based Dependency Injection,

✅Constructor Based Dependency Injection,

✅ Setter Based Dependency Injection.

We will now discuss which of these techniques is the best option in different situations.

🧱 Constructor Based Dependency Injection

Constructor Based Dependency Injection is the most recommended dependency injection technique in the Spring Framework. This technique involves passing all necessary dependencies for an object as arguments to the constructor. The object is created only after all necessary dependencies have been provided.

The main reason for preferring dependency injection through the constructor is that it allows dependencies to be explicit and mandatory. This means that all dependencies necessary for an object to function correctly must be provided at object creation time, which ensures that the object is in a valid state from the start. In addition, injecting dependencies through the constructor makes the code easier to understand and maintain, as all dependencies required for the object are clearly defined in the constructor.

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