This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Framework 6.0.25!

@ResponseBody

See equivalent in the Servlet stack

You can use the @ResponseBody annotation on a method to have the return serialized to the response body through an HttpMessageWriter. The following example shows how to do so:

  • Java

  • Kotlin

@GetMapping("/accounts/{id}")
@ResponseBody
public Account handle() {
	// ...
}
@GetMapping("/accounts/{id}")
@ResponseBody
fun handle(): Account {
	// ...
}

@ResponseBody is also supported at the class level, in which case it is inherited by all controller methods. This is the effect of @RestController, which is nothing more than a meta-annotation marked with @Controller and @ResponseBody.

@ResponseBody supports reactive types, which means you can return Reactor or RxJava types and have the asynchronous values they produce rendered to the response. For additional details, see Streaming and JSON rendering.

You can combine @ResponseBody methods with JSON serialization views. See Jackson JSON for details.

You can use the HTTP message codecs option of the WebFlux Config to configure or customize message writing.