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What is dependency Injection in Spring Boot?

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The process of injecting dependent bean objects into target bean objects is called dependency injection. Setter Injection: The IOC container will inject the dependent bean object into the target bean object by calling the setter method. Constructor Injection: The IOC container will inject the dependent bean object into the target bean object by calling the target bean constructor. Field Injection: The IOC container will inject the dependent bean object into the target bean object by Reflection API.

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