Table of Contents
What is the difference between @RestController and @controller in spring boot?
Difference between @RestController and @Controller in Spring. The @Controller is a common annotation which is used to mark a class as Spring MVC Controller while the @RestController is a special controller used in RESTFul web services and the equivalent of @Controller + @ResponseBody .
What is @API annotation in spring boot?
The @API annotations as per the documentation states “The annotation @Api is used to configure the whole API, and apply to all public methods of a class unless overridden by @APIMethod”.
What is the @controller annotation used for?
The basic purpose of the @Controller annotation is to act as a stereotype for the annotated class, indicating its role. The dispatcher will scan such annotated classes for mapped methods, detecting @RequestMapping annotations (see the next section).
What is difference between @controller and @service?
Their only difference comes in their purpose i.e. @Controller is used in Spring MVC to define controller, which are first Spring bean and then controller. Similarly, @Service is used to annotated classes which hold business logic in the Service layer and @Repository is used in Data Access layer.
What is diff between @controller and RestController?
1. The @Controller is a common annotation that is used to mark a class as Spring MVC Controller while @RestController is a special controller used in RESTFul web services and the equivalent of @Controller + @ResponseBody. 2.
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 call a third party API in spring boot?
How to Call or Consume External API in Spring Boot?
- Procedure:
- Step 1: Creating Spring Boot project.
- Step 2: Create Rest Controllers and map API requests.
- Step 3: Build and run the Project.
- Step 4: Make a call to external API services and test it.
What is Spring REST API?
Spring RestController annotation is used to create RESTful web services using Spring MVC. Spring RestController takes care of mapping request data to the defined request handler method. Once response body is generated from the handler method, it converts it to JSON or XML response.
What are controllers in Spring?
Controller – A controller contains the business logic of an application. Here, the @Controller annotation is used to mark the class as the controller. Front Controller – In Spring Web MVC, the DispatcherServlet class works as the front controller. It is responsible to manage the flow of the Spring MVC application.
What is handler method annotation in Spring MVC?
The default handler is based on the @Controller and @RequestMapping annotations, offering a wide range of flexible handling methods. With the introduction of Spring 3.0, the @Controller mechanism also allows you to create RESTful Web sites and applications, through the @PathVariable annotation and other features.
What is @repository in Spring boot?
@Repository is a Spring annotation that indicates that the decorated class is a repository. A repository is a mechanism for encapsulating storage, retrieval, and search behavior which emulates a collection of objects.