Spring MVC RequestMapping requires trailing slash

Question

There seems to be weird behavior which I can't seem to pinpoint the reason for. When I access a particular url I get a 404 response while other urls that are handled by the same controller class works. I have to add a trailing / to the end of the url in order for the method to be called.

This method DOES NOT get called when accessing localhost:8080/newprofile

 @RequestMapping(value="/newprofile", method=RequestMethod.GET)
    public String newProfile(Model model, Principal principal) {
        return "newprofile";
    }

However, this one DOES get called when accessing localhost:8080/login

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

I have tried both GetMapping and RequestMapping but the methods are never called.

Both methods are contained in my controller class

    @Controller
    public class HomeResources {
    //login
    //new profile
        }

Answer 1

There is a setting responsible for such behavior:

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.html#setUseTrailingSlashMatch-boolean-

Just turn it off:

@Configuration
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {

  @Override
  public void configurePathMatch(PathMatchConfigurer configurer) {
      configurer.setUseTrailingSlashMatch(false);
  }
}

Answer 2

Note that the default behaviour of setUseTrailingSlashMatch changed from true to false since 6.0 in order to support the deprecation of the property.

If you want this to be enabled you have to set it to true now. But as it is marked deprecated, probably best not to do it and instead follow the advice in this Spring Boot 3.0.0 M4 Release Notes

Developers should instead configure explicit redirects/rewrites through a proxy, a Servlet/web filter, or even declare the additional route explicitly on the controller handler (like @GetMapping("/some/greeting", "/some/greeting/") for more targeted cases.