1.基于Redis，使用开源解决方案RedisSessionManager解决多Tomcat实例的Session共享问题。
2.复制RedisSessionManager相关Jar包到:<Tomcat安装目录>/lib/下。
需要Tomcat配置文件：<Tomcat安装目录>/conf/context.xml
<?xml version='1.0' encoding='utf-8'?>
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<!-- The contents of this file will be loaded for each web application -->
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
host="localhost"
port="6379"
database="1"
maxInactiveInterval="30" />
</Context>
//host为Redis的IP地址，Port为Redis的端口，database为Redis的数据库，maxInactiveInterval 为超时时间。
参考资料：