Best answer: What is dependency injection and IoC in spring?

IOC is technique where you let someone else to create the object for you. And the someone else in case of spring is IOC container. Dependency Injection is a technique where one object supplies the dependency of another object.

What is IoC and dependency injection?

Inversion of control is a design principle which helps to invert the control of object creation. … Dependency Injection is a design pattern which implements IOC principle. DI provides objects that an object needs.

What is the dependency injection in Spring?

Dependency Injection is a fundamental aspect of the Spring framework, through which the Spring container “injects” objects into other objects or “dependencies”. Simply put, this allows for loose coupling of components and moves the responsibility of managing components onto the container.

What is the use of IoC in Spring?

Spring IoC is the mechanism to achieve loose-coupling between Objects dependencies. To achieve loose coupling and dynamic binding of the objects at runtime, objects dependencies are injected by other assembler objects.

Which dependency injection is better in spring?

Use Setter injection when a number of dependencies are more or you need readability. Use Constructor Injection when Object must be created with all of its dependency.

What types of dependency injection does spring supports?

Spring supports three types of dependency injection:

  • Constructor-Based Injection: In a constructor-based injection, Spring will use the matching constructor to resolve and inject the dependency. …
  • Setter Injection: …
  • Property-Based Injection:
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What is the advantage of dependency injection in Spring?

DI allows a client to remove all knowledge of a concrete implementation that needs to use. It is more reusable, more testable, more readable code. DI makes it possible to eliminate, or at least reduce unnecessary dependencies. DI allows concurrent or independent development.

What is the Autowiring in Spring?

Autowiring feature of spring framework enables you to inject the object dependency implicitly. It internally uses setter or constructor injection. Autowiring can’t be used to inject primitive and string values.

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