Build a RESTful API with Spring Boot: @RestController

Описание: A controller in Spring Boot is a Java class that is used to handle incoming HTTP requests and send a response back to the client. It is a way of connecting the front-end of an application (the user interface) with the back-end (the business logic and data storage).

Imagine that you have a web application that displays a list of products for sale. When a user clicks on a product, they should be taken to a page that displays more information about that product. In this scenario, the controller would be responsible for handling the request to display the product details page, querying the database to retrieve the relevant information, and sending that information back to the user's browser to be displayed.

Controllers in Spring Boot are typically implemented as Java classes that are annotated with the @Controller annotation. They contain methods that are annotated with specific HTTP method annotations (such as @GetMapping or @PostMapping) to indicate which requests they should handle. These methods typically take in request parameters and a model object, and return a string that represents the name of the view to be rendered.

Overall, controllers are an important part of a Spring Boot application, as they handle the incoming requests and send the appropriate response back to the client. They provide a way of connecting the front-end of the application with the back-end, and are used to execute business logic and interact with other components, such as repositories or services

In the Spring framework, a REST controller is a type of controller that is specifically designed to handle REST (Representational State Transfer) requests. REST is an architectural style for building web services that is based on the HTTP protocol and is designed to be lightweight and flexible.

A REST controller in Spring is a Java class that is annotated with the @RestController annotation. This annotation indicates that the class is a controller and that its methods should handle HTTP requests and return responses in a RESTful manner.

Serving a rest request in spring boot - @Controller @RestController @RequestMapping. Spring boot tutorial for absolute beginners.
   • latest spring boot tutorial for beginners ...