在xml文件里获取jvm环境变量

 1    <context-param>

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

 3              <param-value>

 4                   file:${home}${file.separator}amn_sms${file.separator} config${file.separator}context.xml

 5              </param-value>

 6    </context-param>

 7    <listener>

 8              <listener-class>

 9                   org.springframework.web.context.ContextLoaderListener

10              </listener-class>

11     </listener>