Http 404 Spring java config

Hello i have problem with java config in spring. I was trying to complete it by learning from mutliple tutorials but still i have something wrong. Any clue ?

error

AppConfig.java

    package org.spring.mvc.libraryDemo.config;

    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Import;
    import org.springframework.web.servlet.ViewResolver;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.view.InternalResourceViewResolver;
    import org.springframework.web.servlet.view.JstlView;

/**
 * Created by wiktor on 28.12.2015.
 */
@Configuration //adnotacja oznaczajaca plik konfiguracyjny
@EnableWebMvc
@ComponentScan(basePackages = "org.spring.mvc.libraryDemo") //enable skan komponentow
@Import({AppConfig.class}) //na co musi jeszcze uwazac Spring
public class AppConfig {

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/pages/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }

}

SpringConfigInit

package org.spring.mvc.libraryDemo.config;

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

    public class SpringConfigInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

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

        @Override
        protected Class<?>[] getServletConfigClasses() {
            return null;
        }

        @Override
        protected String[] getServletMappings() {
            return new String[] { "/" };
        }

    }

Controller

package org.spring.mvc.libraryDemo.controllers;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * Created by wiktor on 28.12.2015.
 */
@Controller
public class HomeController {

    @RequestMapping(value="/",method= RequestMethod.GET)
    public String sayHello(ModelMap modelMap)
    {
        modelMap.addAttribute("greeting","witaj");
        return "index";
    }
}

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://ift.tt/19L2NlC"
         xmlns:xsi="http://ift.tt/ra1lAU"
         xsi:schemaLocation="http://ift.tt/19L2NlC http://ift.tt/1drxgYl"
         version="3.1">
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>