Is Spring MVC Still Relevant in the Age of Reactive WebFlux?

Spring MVC is not obsolete; it remains the dominant Java web development framework, but the discussion gains relevance because it sits at a turning point in web development philosophy.

The question of whether a tightly coupled front‑back framework like Spring MVC is outdated is misguided; Spring MVC can be used with @RestController to achieve a clear separation.

@RestController
@RequestMapping("books-rest")
public class SimpleBookRestController {
    @GetMapping("/{id}", produces = "application/json")
    public Book getBook(@PathVariable int id) {
        return findBookById(id);
    }

    private Book findBookById(int id) {
        // ...
    }
}

When the front‑end and back‑end communicate via JSON over HTTP, @RestController becomes the natural choice; JSON serves as the View in server‑side MVC and as the Model in client‑side MVC.

Since Spring 5, the framework has embraced reactive programming, introducing Spring WebFlux as a parallel, non‑blocking model alongside the traditional Servlet‑based Spring MVC.

The left side of the diagram shows the new reactive WebFlux stack, while the right side depicts the familiar MVC stack built on the Servlet API.

Spring One 2018 highlighted the “Reactive Revolution,” with many sessions focusing on reactive topics, indicating Spring’s strategic shift toward this paradigm.

Although both MVC and WebFlux may coexist for some time, the long‑term direction points toward reactive architectures, and Spring’s extensive ecosystem ensures that both models remain supported, especially through Spring Boot.

In summary, Spring MVC remains a mature, widely adopted server‑side framework, but it does not represent the future trajectory of web development, which is moving toward reactive, full‑stack solutions.