Force 404 error while adding extension to url

I need help mapping urls, in my code when I go to:

http://localhost:8080/register.asdf
http://localhost:8080/register.asddsdsd etc.

      

        
        
        
      

    

it always returns http://localhost:8080/register

, but I want to make it NOT FOUND.
How can I fix this?

public class WebInitializer implements WebApplicationInitializer {

@Override
public void onStartup(ServletContext servletContext) throws ServletException {    
    AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();  
    ctx.register(Config.class);  
    ctx.setServletContext(servletContext);    
    Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));  
    servlet.addMapping("/");  
    servlet.setLoadOnStartup(1);
}

      

        
        
        
      

    

}

@Controller
public class UserController {

@RequestMapping(path = "/register", method = RequestMethod.GET)
public String registerGet(Model model) {

    return "register";
}

      

        
        
        
      

    

EDIT: I added the following code to Config.java and solved it thanks.

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