What is the purpose of the @RestController annotation in
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What is the purpose of the @RestController annotation in
The @RestController annotation in Spring Boot (Java) is used to define a controller that serves RESTful web services. It is a specialized version of the @Controller annotation that automatically serializes responses into JSON or XML and sends them back to the client.
Purpose of @RestController:
Simplifies REST API creation:
Combines @Controller and @ResponseBody, so you don’t need to add @ResponseBody to each method.
All returned values from methods are automatically written to the HTTP response body (typically in JSON format).
Used in RESTful web services:
Deal for APIS that return data (not HTML).
Often used in backend services for web or mobile apps.
Typical Use Case:
Define endpoints that handle HTTP requests (GET, POST, PUT, DELETE).
Return objects/data (e.g., a list of users, a product detail) directly to the frontend or client application.
Summary:
@RestController is used in Spring Boot to easily create REST APIs. It handles serialization automatically and ensures your controller methods return data directly to clients in a web-friendly format like JSON.
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