Component spring

@Component is an annotation that allows Spring to automatically detect our custom beans. In other words, without having to write any explicit code, Spring will: Scan our application for classes annotated with @Component. Instantiate them and inject any specified dependencies into them.

1. What are the different components of Spring?
2. Is @component a bean?
3. What is @component in Java?
4. Can we use @component instead of controller?
5. What are components used in Spring MVC?
6. What is the difference between @component and ComponentScan?
7. What is the difference between @component and @ComponentScan?
8. What is the difference between @controller and @component?
9. How do you name a component in a Spring?
10. What is the difference between component and container in Java?
11. What is @component and @service?
12. What is @component annotation in Spring boot?
13. What will happen if you will use @service over a DAO?

What are the different components of Spring?

The Core Container consists of the spring-core , spring-beans , spring-context , spring-context-support , and spring-expression (Spring Expression Language) modules. The spring-core and spring-beans modules provide the fundamental parts of the framework, including the IoC and Dependency Injection features.

Is @component a bean?

@Component is a class level annotation whereas @Bean is a method level annotation and name of the method serves as the bean name.

What is @component in Java?

A component is an object having a graphical representation that can be displayed on the screen and that can interact with the user. Examples of components are the buttons, checkboxes, and scrollbars of a typical graphical user interface.

Can we use @component instead of controller?

@Component serves as a generic stereotype for any Spring-managed component; whereas, @Repository, @Service, and @Controller serve as specializations of @Component for more specific use cases (e.g., in the persistence, service, and presentation layers, respectively).

What are components used in Spring MVC?

Spring MVC uses three components to layout and design web applications, as its name implies: model, view, and controller. The model component includes the data and structure of the application and plays a role in setting the rules and logic the application uses.

What is the difference between @component and ComponentScan?

The main difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications. Now, let's go through them in more detail.

What is the difference between @component and @ComponentScan?

The basic difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications.

What is the difference between @controller and @component?

@Component is a generic stereotype for any Spring-managed component or bean. @Repository is a stereotype for the persistence layer. ... @Controller is a stereotype for the presentation layer (spring-MVC).

How do you name a component in a Spring?

@Component belongs to Spring API. It marks class to be autodetected as a bean and optionally allows you to specify a name for that bean ( @Component("foo") ). Without explicit name specification detected bean will get a default name derived from the name of its class. @Named belongs to javax.

What is the difference between component and container in Java?

What is the difference between Component class and Container class in Java? The class Component is the abstract base class for the non-menu user-interface controls of AWT. ... The class Container is the superclass for the containers of AWT. The container object can contain other AWT components.

What is @component and @service?

@Component is a generic stereotype for any Spring-managed component. @Service annotates classes at the service layer. @Repository annotates classes at the persistence layer, which will act as a database repository.

What is @component annotation in Spring boot?

@Component is an annotation that allows Spring to automatically detect our custom beans. In other words, without having to write any explicit code, Spring will: Scan our application for classes annotated with @Component. Instantiate them and inject any specified dependencies into them. Inject them wherever needed.

What will happen if you will use @service over a DAO?

In your scenario, it has no impact on application flow whether you use @Service or @Repository, application will work as they are elligible for autowiring. But standard practice is to use @Repository for dao classes.