Difference between @component & @bean annotations in Spring boot | Interview Question | Code Decode

Veröffentlicht am: 08 Dezember 2023
auf dem Kanal: Code Decode

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In this video of code decode we have explained @bean vs @component difference in spring boot

Aspect
@Component
@Bean
Purpose/Role
Class level Spring component annotation.
Method-level annotation for creating beans.
Typical Use Case
Represents a general-purpose bean.
Used to explicitly declare individual beans.
Creation of Instances
Automatically created and managed by Spring.
Explicitly defined in a configuration class.
Component Scanning
Detected and registered during component scanning.
Not detected during component scanning; requires explicit configuration (@Configuration ).
Dependency Injection
Can be injected into other components through Spring's IoC container.
Can be injected into other components; the method returning the bean is invoked.

Lifecycle Management
Spring manages the complete lifecycle of components.
Spring manages the lifecycle of beans, but individual methods in a @Configuration class are not managed by Spring.
Dependencies
Simpler to use for straightforward scenarios without intricate configurations
Well-suited for handling complex dependencies and conditional bean creation(using @Conditional)
Customization
Provides less explicit control, suitable for default configurations
Offers fine-grained control over bean instantiation and configuration
Naming Conventions
Class name is used as the default bean name (can be customized with @Component("customName"))
Method name determines the bean name (unless specified explicitly)

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