设置session 有效时间

<?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>struts2_bar</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>

	<!-- 设置session 有效时间 -->
	<session-config>
		<session-timeout>30</session-timeout>
	</session-config>

	<servlet>
		<servlet-name>authImg</servlet-name>
		<servlet-class>org.cric.util.AuthImg</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>authImg</servlet-name>
		<url-pattern>/authImg</url-pattern>
	</servlet-mapping>
	<!--过滤器解析 *.jsp  因为要解析sturts标签-->
	<filter>
		<filter-name>struts</filter-name>
		<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts</filter-name>
		<url-pattern>*.action</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>struts</filter-name>
		<url-pattern>*.jsp</url-pattern>
	</filter-mapping>
	
</web-app>