Spring MVC - Extending WebMvcConfigurationSupport Examples

@Configuration
@ComponentScan
public class MyWebConfig extends WebMvcConfigurationSupport {

    @Override
    protected ConfigurableWebBindingInitializer getConfigurableWebBindingInitializer(
            FormattingConversionService mvcConversionService,
            Validator mvcValidator) {

        ConfigurableWebBindingInitializer initializer =
                super.getConfigurableWebBindingInitializer(mvcConversionService,
                                                           mvcValidator);

        initializer.setPropertyEditorRegistrar(propertyEditorRegistry -> {
            SimpleDateFormat dateFormatter =
                    new SimpleDateFormat("yyyy-MM-dd");
            propertyEditorRegistry.registerCustomEditor(
                    Date.class, new CustomDateEditor(dateFormatter,
                                                     true));
        });
        return initializer;
    }
}

@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;
    }
}