分布式，使用spring-session管理session

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分布式环境下，解决session共享问题

适用场景举例：分布式情况下，一个web应用程序，可能会有多台服务器，假如有两台服务器A，服务器B。在不解决session共享的情况下，用户在服务器A上是登陆状态，session有效，但是在服务器B上是无效的。如果用户在登陆A的情况下，请求服务器B，session不能共享，登陆状态会失效。

解决方案

spring，针对这个问题，推出了spring-session机制，通过过滤器(filter)，将session统一存储在某个数据集里面，然后将这些session存储在reds中。

具体配置实现

在web.xml中添加过滤器(filter)，把过滤器放在最前面。

 <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>/*</url-pattern></filter-mapping>

增加maven依赖：POM.xml

<!-- spring session --><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-redis</artifactId><version>1.5.2.RELEASE</version></dependency><dependency><groupId>org.springframework.session</groupId><artifactId>spring-session</artifactId><version>1.0.2.RELEASE</version></dependency>

3.注册spring-redis配置信息

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">    <bean name="genericObjectPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxWaitMillis" value="${redis.maxWaitMillis}" />        <property name="maxTotal" value="${redis.maxTotal}" />        <property name="minIdle" value="${redis.minIdle}" />        <property name="maxIdle" value="${redis.maxIdle}" />        <property name="testOnBorrow" value="${redis.testOnBorrow}" /> <!-- 当调用borrow Object方法时，是否进行有效性检查 -->    </bean>    <bean name="redisCache" class="com.iplatform.common.cache.RedisCacheFactory">        <property name="address" value="${cluster.address}" />        <property name="timeout" value="${cluster.timeout}" />        <property name="maxRedirections" value="${cluster.maxRedirections}" />        <property name="redisServerMode" value="${cluster.redisServerMode}"/>        <property name="genericObjectPoolConfig" ref="genericObjectPoolConfig" />    </bean>    <bean name="redisCacheAdvance" class="com.iplatform.common.cache.RedisCacheAdvance">        <property name="redisCache" ref="redisCache" />    </bean>    <context:annotation-config />    <!-- 将session放入redis -->    <bean id="redisHttpSessionConfiguration"        class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">        <property name="maxInactiveIntervalInSeconds" value="1800" />    </bean>    <bean id="jedisConnectionFactory"        class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">        <property name="hostName" value="${redis2.host}" />        <property name="port" value="${redis2.port}" />        <!-- <property name="password" value="${redis2.pass}" /> -->        <property name="timeout" value="${redis2.timeout}" />        <property name="poolConfig" ref="genericObjectPoolConfig" />        <property name="usePool" value="${redis2.usePool}" />    </bean>    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">        <property name="connectionFactory" ref="jedisConnectionFactory" />    </bean> </beans>

4.增加redis配置信息

redis.maxWaitMillis=-1redis.maxTotal=1000redis.minIdle=8redis.maxIdle=100redis.testOnBorrow=truecluster.timeout=300000cluster.maxRedirections=6#cluster.address=192.168.200.221:7100cluster.address=redis.tanrey.com:6379#for single redis is S,for the cluster redis is Ccluster.redisServerMode=S#for spring session,true:单例配置,false:集群,目前可共用同一redisredis2.usePool=trueredis2.host=redis.tanrey.comredis2.port=6379redis2.pass=redis2.timeout=300000

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