[FIXED] WebMvcConfigurer not working in spring boot?

Issue

I changed my perfectly working controller class which were just doing the purpose of view resolution like so:

@Controller
public class MyController {

@GetMapping("/signup")
public String signupPage() {
    return "signup";
}

@GetMapping("/login")
public String loginPage() {
    return "login";
}

@GetMapping("/dashboard")
public String dashboardPage() {
    return "dashboard";
}

@GetMapping("/logout")
public String logoutPage() {
    return "redirect:/";
}
}

To a class extending WebMvcConfigurer, which had all the view resolvers like so:

@Configuration
@EnableWebMvc
public class ViewConfig implements WebMvcConfigurer {

@Override
public void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/signup").setViewName("signup");
    registry.addViewController("/login").setViewName("login");
    registry.addViewController("/dashboard").setViewName("dashboard");
    registry.addViewController("/logout").setViewName("redirect:/");
}

This felt a lot more concise, and clean.

But this is giving me 405 Method Not Allowed error, whenever I try to load any of these pages. Why is this happening? Does spring boot not support WebMvcConfigurer?

Solution

This is mentioned in the Spring Boot Documentation, under the spring mvc section you can use WebMvcConfigurer, but you do not need to do @EnableWebMvc

So you should remove the @EnableWebMvc annotation!

@Configuration
// @EnableWebMvc Remove this!
public class ViewConfig implements WebMvcConfigurer {

@Override
public void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/signup").setViewName("signup");
    registry.addViewController("/login").setViewName("login");
    registry.addViewController("/dashboard").setViewName("dashboard");
    registry.addViewController("/logout").setViewName("redirect:/");
}

Answered By - YeetCoder