不用xml文件配置springMVC，为什么不进Controller层

最近在研究spring的思想，看到了一个配置springMVC的方法是不用配置文件自动配置加载的，就想试一下，结果我的代码和源码一模一样，就是不进Controller层，求大牛指点

 package spittr.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * Created by Administrator on 2017/4/18.
 */
public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[]{WebConfig.class};
    }

    /**
     * 将DispatcherServlet映射到"/"
     *
     * @return
     */
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

这个相当于web.xml

 package spittr.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
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.springframework.web.servlet.view.InternalResourceViewResolver;

/**
 * Created by Administrator on 2017/4/18.
 */

@Configuration
@EnableWebMvc
@ComponentScan("spittr.web")
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean
    public ViewResolver viewResolver() {
        try {
            InternalResourceViewResolver resolver = new InternalResourceViewResolver();
            resolver.setPrefix("/WEB-INF/views/");
            resolver.setSuffix(".jsp");
            resolver.setExposeContextBeansAsAttributes(true);
            return resolver;
        }catch (Exception e){
        e.printStackTrace();
        }
return null;

    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}

 package spittr.config;

/**
 * Created by Administrator on 2017/4/18.
 */

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.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@ComponentScan(basePackages = {"spittr"},
        excludeFilters = {
                @Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)
        })

public class RootConfig {
}

这是我的Controller文件

 package spittr.controller;

/**
 * Created by Administrator on 2017/4/18.
 */

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

import static org.springframework.web.bind.annotation.RequestMethod.GET;
@Controller("home")
public class HomeController {

    @RequestMapping(value = "/", method = GET)
    public String home(HttpServletRequest request ) {
        System.out.println("12312312321");
        return "Home";
    }

}

这是我的jsp文件

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2017/4/18
  Time: 16:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Spittr</title>
</head>
<body>
<h1>Welcome to Spittr1</h1>
</body>
</html>

这是我的数据结构

然后后台也没有报任何错误，配置了log4j，级别是debug。
用debug跑项目的时候只是给我提示loaded classer are up to date。Nothing to reload。求大牛指点迷津啊

这是debug提示信息

这是后台运行信息

检查一下Tomcat部署的路径，我之前就是因为没有改路径所以一直进不去controller