Session會話管理
在Web項目開發中,Session會話管理是一個很重要的部分,用於存儲與記錄用戶的狀態或相關的數據;通常情況下session交由容器(tomcat)來負責存儲和管理,但是如果項目部署在多台tomcat中,則session管理存在很大的問題;1、多台tomcat之間無法共享session,比如用戶在tomcat A服務器上已經登錄了,但當負載均衡跳轉到tomcat B時,由於tomcat B服務器並沒有用戶的登錄信息,session就失效了,用戶就退出了登錄;2、一旦tomcat容器關閉或重啟也會導致session會話失效;因此如果項目部署在多台tomcat中,就需要解決session共享的問題;
配置文件
1 pom.xml <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-data-redis</artifactId> <version>1.3.1.RELEASE</version> </dependency> 2 web.xml <filter> <filter-name>springSessionRepositoryFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSessionRepositoryFilter</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:applicationContext.xml </param-value> </context-param> 3 applicationContext.xml <context:annotation-config/> <!-- 初始化一切spring-session准備,且把springSessionFilter放入IOC --> <bean id="redisHttpSessionConfiguration" class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration"> <property name="maxInactiveIntervalInSeconds" value="300"/> </bean> <!-- 配置cookie信息--> <bean class="org.springframework.session.web.http.DefaultCookieSerializer" id="defaultCookieSerializer"> <property name="cookieName" value="SESSION_NAME"/> <property name="domainName" value="wangjun.com"/> <property name="useHttpOnlyCookie" value="true"/> <property name="cookiePath" value="/"/> <property name="cookieMaxAge" value="31536000"/> </bean> <!-- 配置redis連接池信息--> <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxTotal" value="20"/> </bean> <!--配置redis連接信息--> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="hostName" value="127.0.0.1"/> <property name="port" value="6379"/> <property name="poolConfig" ref="jedisPoolConfig"/> </bean>
代碼測試
public class SessionServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String sesssionID = request.getSession().getId(); //部署兩份,把這個地方8081改成8080就行了,只是為了區分 response.getWriter().write("8081 Server SessionID"+sesssionID); } }