webapp/WEB-INF/web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>service</display-name>
<!--配置文件-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationcontext.xml</param-value>
  </context-param>
<!-- spring容器的监听器 -->
  <listener>    
     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
</web-app>