Spring Framework FAQ: Top Questions

Spring MVC is based on the traditional servlet API and blocking I/O, while Spring WebFlux is designed for reactive programming and non-blocking I/O.

📘 Comparison:

• Spring MVC: Thread-per-request model using servlet containers.
• Spring WebFlux: Asynchronous, reactive streams using Project Reactor.

📥 Code Snippets:

@RestController
public class MvcController {
  @GetMapping("/hello")
  public String sayHello() {
    return "Hello from MVC";
  }
}

@RestController
public class FluxController {
  @GetMapping("/hello")
  public Mono<String> sayHello() {
    return Mono.just("Hello from WebFlux");
  }
}

🏆 Expected Output:

Spring MVC returns String; WebFlux returns a reactive Mono<String>.

🛠️ Use Cases:

• Use MVC for traditional web apps or blocking I/O.
• Use WebFlux for high concurrency and reactive systems.