一、在pom.xml添加springsession
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<!--springsession-->
<dependency>
<groupid>org.springframework.session</groupid>
<artifactid>spring-session-data-redis</artifactid>
<version>1.2.0.release</version>
</dependency>
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二、确保spring是4.3.10.release版本以上
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<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-context</artifactid>
<version>4.3.10.release</version>
</dependency>
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三、applicationcontext.xml文件中添加四个bean类
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<bean id="redishttpsessionconfiguration" class="org.springframework.session.data.redis.config.annotation.web.http.redishttpsessionconfiguration">
<property name="maxinactiveintervalinseconds" value="180"></property>
</bean>
<bean id="jedispoolconfig" class="redis.clients.jedis.jedispoolconfig">
</bean>
<bean id="jedisconnectionfactory"
class="org.springframework.data.redis.connection.jedis.jedisconnectionfactory">
<property name="hostname" value="127.0.0.1"></property>
<property name="port" value="6379"></property>
<property name="poolconfig" ref="jedispoolconfig"></property>
</bean>
<bean id="defaultcookieserializer"
class="org.springframework.session.web.http.defaultcookieserializer">
<property name="cookiename" value="springsession"></property>
<property name="cookiepath" value="/"></property>
<property name="cookiemaxage" value="3600"/>
<property name="usehttponlycookie" value="true"/>
<property name="domainname" value=".qs.com"/>
</bean>
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这样就可以实现session共享，nginx下的tomcat集群也是这样的
原理就是：通过springsession对servlet带的session进行封装，接管session
原文链接：https://blog.csdn.net/qq_38553333/article/details/80117300