使用Tomcat+Servlet+Spring搭建项目访问网页报404错误求助

我在自行开发基于Spring/Servlet的Java应用时，遇到了网页加载一直返回HTTP Status 404 – Not Found错误的问题，我已经检查确认所有XML的Servlet映射和Java代码配置都没有错误。目前除了前端加载404时提示The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.之外，后端没有任何报错，XML里配置的路径也没有异常，我不清楚为什么请求路径无法映射到实际的JSP文件。

以下是我目前的项目结构和代码：

web.xml #

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>

  <display-name>spring-mvc-demo</display-name>

  <!-- Step 1: Configure Spring MVC Dispatcher Servlet -->
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/spring-mvc-demo-servlet.xml</param-value>
    </init-param>

  </servlet>

  <!-- Step 2: Set up URL mapping for Spring MVC Dispatcher Servlet -->
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

spring-mvc-demo-servlet.xml #

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <!-- Step 3: Add support for component scanning -->
    <context:annotation-config/>
    <context:component-scan base-package="com.christien" />

    <!-- Step 4: Add support for conversion, formatting and validation support -->
    <mvc:annotation-driven/>

    <!-- Step 5: Define Spring MVC view resolver -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

HelloWorldController.java #

package com.christien;

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

@Controller
public class HelloWorldController {

    @RequestMapping("/")
    public String index(){
        return "index";
    }

    //controller method to show the initial form
    @RequestMapping("/showForm")
    public String showForm(){
        return "helloworld-form";
    }

    //controller method to process the form
    @RequestMapping("/processForm")
    public String processForm(){
        return "helloworld";
    }

}

内容的提问来源于stack exchange，提问作者c.s_..