kaola4549 发表于 2015-11-14 12:59:05

Tomcat7+Redis存储Session

  PS:截止到2015-05-12前是不支持Tomcat8的,详情见官网:https://github.com/jcoleman/tomcat-redis-session-manager
  前提:你已经部署了Redis,尚未学会的,可以移步这里:http://blog.iyunv.com/caiwenfeng_for_23/article/details/45511007
  我的案例下载:http://download.iyunv.com/detail/caiwenfeng_for_23/8689847
  其实很简单,就几个步骤:

1.配置Tomcat的conf目录下的context.xml文件:
  1> 单点Reids配置

    <!--
Jedis save session
-->
<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />      
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
host="localhost"
port="6379"
database="0"
maxInactiveInterval="60"/>
  2> Sentinel集群配置:

      <!-- Sentinel 配置 -->
<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />      
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
maxInactiveInterval="60"
sentinelMaster="mymaster"
sentinels="127.0.0.1:26379,127.0.0.1:26380,127.0.0.1:26381,127.0.0.1:26382"
/>
  2.添加jar

  3.测试
  1>

存储Session:

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("hello");
//取得Session对象
HttpSession session=request.getSession();
//设置Session属性
for(int i=0;i<100000;i++){
session.setAttribute("name"+i, "Magci_"+i);
}
}
  2>重启Tomcat:假如Session保存在tomcat下,重启后Session不存在;如果保存在Redis下,Tomcat重启对Session无影响
  3>取出Session:


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("hello");
//取得Session对象
HttpSession session=request.getSession();
//取出Session属性
for(int i=0;i<100000;i++){
System.out.println(session.getAttribute("name"+i));
}
}
  注意事项:从Tomcat6开始默认开启了Session持久化设置,测试时可以关闭本地Session持久化,其实也很简单,在Tomcat的conf目录下的context.xml文件中,取消注释下面那段配置即可:


    <!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
  详见这篇博客:Session持久化的实例分析
  可以尝试运行上面的demo案例!

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