springMVC配置求助
初学springMVC遇到如下问题：
按照网上配置后游览器输入http://localhost:8080/BootStrap/index，出现404，求助啊。。

我的几个配置文件如下：
web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="free-blog" version="2.4"

	xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">



    <listener>  

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  

    </listener>  

    <!-- 配置spring核心servlet -->  

    <servlet>

		<servlet-name>spring</servlet-name>

		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

		<init-param>

			<param-name>contextConfigLocation</param-name>

			<param-value>/WEB-INF/spring-servlet.xml</param-value>

		</init-param>

		<load-on-startup>1</load-on-startup>

	</servlet> 

      

    <!-- url-pattern配置为/，不带文件后缀，会造成其它静态文件(js，css等)不能访问。如配为*.do，则不影响静态文件的访问 -->  

    <servlet-mapping>  

        <servlet-name>spring</servlet-name>  

        <url-pattern>*.do</url-pattern>  

    </servlet-mapping>

    

    <filter>

		<filter-name>encoding</filter-name>

		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

		<init-param>

			<param-name>encoding</param-name>

			<param-value>UTF-8</param-value>

		</init-param>

	</filter>

	<filter-mapping>

		<filter-name>encoding</filter-name>

		<url-pattern>/</url-pattern>

	</filter-mapping>

	<!-- 访问ico时,交给默认的servlet处理 -->

	<servlet-mapping>

		<servlet-name>default</servlet-name>

		<url-pattern>*.ico</url-pattern>

	</servlet-mapping>  

</web-app>

spring-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"