Servlet配置
<servlet>
? ? <servlet-name>action</servlet-name>
? ? <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
? ? <init-param>
? ? ? <param-name>config</param-name>
? ? ? <param-value>/WEB-INF/struts-config.xml</param-value>
? ? </init-param>
? ? <load-on-startup>2</load-on-startup> ? ?// servlet载入优先级，<0则在访问的时候实例化，>0则在容器初始化时实例化，=1最先初始化
?</servlet>
