在web.xml中加入

<context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>
           ebop-server.root
       </param-value>
</context-param>
<listener>
    <listener>
        <listener-class>org.springframework.web.util.WebAppRootListener<
 
/listener-class>
    </listener>
//程式碼獲取  
String webroot = System.getProperty("ebop-server.root")