Snippet

Returning JSON with @RestController

The @RestController annotation tells Spring that this class handles web requests and automatically converts the return value (like a Java object) into JSON format.

snippet.java

java

@RestController
public class MessageController {
    @GetMapping("/hello")
    public Message getMessage() {
        return new Message("Hello, Spring!");
    }
}

spring

Breakdown

@RestController

Marks the class as a web controller where every method returns a domain object instead of a view.

@GetMapping("/hello")

Maps HTTP GET requests to the /hello URL to this method.

public Message getMessage()

Returns a Java object which Spring converts to JSON automatically.

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Returning JSON with @RestController

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