Spring MVC - RequestMappingHandlerMapping Examples

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

@Controller
public class ExampleController {

    @Autowired
    private RequestMappingHandlerMapping mapping;

    @RequestMapping("/example")
    @ResponseBody
    public String handle () {
        System.out.println(mapping);
        return "got it";
    }
}

@Configuration
@ComponentScan
@EnableWebMvc
public class AppConfig implements WebMvcConfigurer {

    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        UrlPathHelper urlPathHelper = new UrlPathHelper();
        urlPathHelper.setAlwaysUseFullPath(true);
        configurer.setUrlPathHelper(urlPathHelper);
    }
}

@Configuration
@ComponentScan
public class AppConfig extends WebMvcConfigurationSupport {

    @Bean
    @Override
    public RequestMappingHandlerMapping requestMappingHandlerMapping(
            @Qualifier("mvcContentNegotiationManager")
            ContentNegotiationManager contentNegotiationManager,
            @Qualifier("mvcApiVersionStrategy") @Nullable
            ApiVersionStrategy apiVersionStrategy,
            @Qualifier("mvcConversionService")
            FormattingConversionService conversionService,
            @Qualifier("mvcResourceUrlProvider")
            ResourceUrlProvider resourceUrlProvider) {

        // Fetch the default instance constructed by Spring
        RequestMappingHandlerMapping m = super.requestMappingHandlerMapping(
                contentNegotiationManager,
                apiVersionStrategy,
                conversionService,
                resourceUrlProvider
        );
        m.setDefaultHandler(new MyDefaultHandler());
        return m;
    }
}