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>
//代码获取
String webroot = System.getProperty("ebop-server.root")