Can we use @controller instead of @RestController?

Now, you don't need to use the @Controller and the @RestponseBody annotation. Instead you can use the @RestController to provide the same functionality. In short, it is a convenience controller which combines the behavior of the @Controler and the @Response body into one.

Can we replace @RestController with @controller?

In simple words, @RestController is @Controller + @ResponseBody. So if you are using latest spring version you can directly replace @Controller with @RestController without any issue.

Can we use @controller instead of @service?

No, @Controller is not the same as @Service , although they both are specializations of @Component , making them both candidates for discovery by classpath scanning. The @Service annotation is used in your service layer, and @Controller is for Spring MVC controllers in your presentation layer.

What is the difference between the @controller annotation and @RestController annotation?

The @Controller annotation indicates that the class is controller like web Controller while @RestController annotation indicates that the class is controller where @RequestMapping Method assume @ResponseBody by Default(i.e REST APIs).

Can we use @controller in Spring boot?

Introduction. In Spring Boot, the controller class is responsible for processing incoming REST API requests, preparing a model, and returning the view to be rendered as a response. The controller classes in Spring are annotated either by the @Controller or the @RestController annotation.

@RestController Vs @Controller. Difference between @RestController and @Controller In Spring Boot

What is difference between @RestController and controller?

@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it's the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.

What is the @controller annotation used for?

The @Controller annotation indicates that a particular class serves the role of a controller. There is no need to extend any controller base class or reference the Servlet API.

Why would you annotate a class with @controller rather than @RestController?

The @Controller annotation indicates that the class is a “Controller” e.g. a web controller while the @RestController annotation indicates that the class is a controller where @RequestMapping methods assume @ResponseBody semantics by default i.e. servicing REST API.

What is the difference between @controller and @component?

@Component : It is a basic auto component scan annotation, it indicates annotated class is an auto scan component. @Controller : Annotated class indicates that it is a controller component, and mainly used at the presentation layer. @Service : It indicates annotated class is a Service component in the business layer.

Why do we use @RestController annotation?

We can annotate classic controllers with the @Controller annotation. This is simply a specialization of the @Component class, which allows us to auto-detect implementation classes through the classpath scanning. We typically use @Controller in combination with a @RequestMapping annotation for request handling methods.

Can we use @component instead of @service?

We can use @Component across the application to mark the beans as Spring's managed components. Spring will only pick up and register beans with @Component, and doesn't look for @Service and @Repository in general. @Service and @Repository are special cases of @Component.

Does @controller create a bean?

Because @Controller is a specialization of Spring's @Component Stereotype annotation, the class will automatically be detected by the Spring container as part of the container's component scanning process, creating a bean definition and allowing instances to be dependency injected like any other Spring-managed ...

Is @controller a bean?

It's already a Bean in your ApplicationContext, so you can auto-wire it by type.

What happens if we replace @repository with @service?

There are no problem occur when I interchange the @service and @repository annotation in the spring MVC. That would probably screw up your transactions. A service needs to pass transactions that need propagation to the DAO. Both are components so creation of a bean wont be a problem.

Can I Autowire a class?

The answer for your question is YES. You can use autowired in thread class.

Can we Autowire Restcontroller?

Yes. I'm referring the interfaces as the dependency rather accessing the web module uri. Meant by heading is autowiring the web module spring bean classes into spring core project.

Can we use @component and @service in same class?

tl;dr: Use @Component or @Service on both, and there's no significant difference between them ( @Component is becoming more usual because of that).

What will happen if we use @component instead of @controller?

@Controller is a @Component . The @Component is used as a meta-annotation here so that it can be picked-up using component-scanning. The @Controller is a special component which will have some added functionality. If you remove the @Component annotation component-scan will not detect it anymore.

Is @component a singleton?

Yes, that is correct, @Component is a Spring bean and a Singleton. About singletons - spring beans are all in singleton scope by default.

Can Spring boot have two REST controllers?

In Spring MVC, we can create multiple controllers at a time. It is required to map each controller class with @Controller annotation.

Is @ResponseBody required?

@SeanPatrickFloyd @RequestBody is actually still required, @ResponseBody is implicit when using @RestController .

Why controller is used in Spring?

The @Controller annotation indicates that a particular class serves the role of a controller. Spring Controller annotation is typically used in combination with annotated handler methods based on the @RequestMapping annotation. It can be applied to classes only. It's used to mark a class as a web request handler.

What is difference between @controller and @service?

@Controller annotation indicates that a particular class serves the role of a controller. @Service annotation is used with classes that provide some business functionalities.

What is @controller annotation in Java?

The @Controller annotation is used to mark any java class as a controller class. The @RequestMapping annotation is used to map the web request "/userRegistration. htm" to the UserController class. The @SessionAttributes annotation is used to store the model object in the session. In our case the model object is user.

What is @controller in Spring boot?

Spring Boot @Controller

@Controller annotation indicates that the annotated class is a controller. It is a specialization of @Component and is autodetected through classpath scanning. It is typically used in combination with annotated handler methods based on the @RequestMapping annotation.