Spring MVC + Thymeleaf почему ошибка 404

package app;
 
 
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
 
public class SiteWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
 
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]  {RootConfig.class};
    }
 
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[] {WebConfig.class};
    }
 
    protected String[] getServletMappings() {
        return new String[] {"/"};
    }
}

package app;
 
import org.springframework.context.annotation.*;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
import org.thymeleaf.templateresolver.TemplateResolver;
 
 
@Configuration
@EnableWebMvc //Enable Spring MVC
@ComponentScan("app") //Enable component-scanning
public class WebConfig extends WebMvcConfigurerAdapter {
 
    @Bean
    public ViewResolver viewResolver(SpringTemplateEngine templateEngine) {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setTemplateEngine(templateEngine);
        return viewResolver;
    }
    @Bean
    public SpringTemplateEngine templateEngine(TemplateResolver templateResolver) {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver);
        return templateEngine;
    }
 
    @Bean
    public TemplateResolver templateResolver() {
        TemplateResolver templateResolver = new ServletContextTemplateResolver();
        templateResolver.setPrefix("/WEB-INF/views/");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode("HTML5");
        return templateResolver;
    }
 
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}

package app;
 
import java.util.regex.Pattern;
 
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.core.type.filter.RegexPatternTypeFilter;
 
import app.RootConfig.WebPackage;
 
@Configuration
@ComponentScan(basePackages={"app"},
        excludeFilters={
                @Filter(type=FilterType.CUSTOM, value=WebPackage.class)
        })
public class RootConfig {
    public static class WebPackage extends RegexPatternTypeFilter {
        public WebPackage() {
            super(Pattern.compile("app"));
        }
    }
}

package app;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import static org.springframework.web.bind.annotation.RequestMethod.GET;
 
@Controller
@RequestMapping("/")
public class WebAppController {
 
    @RequestMapping(method = GET)
    public String home() {
        return "index";
    }
 
}

@EnableWebMvc