搭建Tomcat+session共享,用Redis保存session

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环境： Win7,Tomcat7
1. 下载
   redis : https://github.com/MSOpenTech/redis/releases
   tomcat-redis-session-manager : https://github.com/jcoleman/tomcat-redis-session-manager
2. Tomcat添加Jar包
    1. tomcat-redis-session-manager.jar : 下载源码编译
   2. jedis,commons-pool2,tomcat-juli   : tomcat-redis-session-manager.jar依赖包（tomcat/lib里没有）
   3. 添加到tomcat/lib目录
   ## 可以使用http://download.csdn.net/download/u010379996/9792528
3. 配置Tomcat:context.xml
   <Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
   <Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
           host="127.0.0.1"
           port="6379"
           database="0"
           maxInactiveInterval="1800" />
4. 测试
   I. 创建session.jsp:
       <%@page import="java.io.PrintWriter"%>
       <%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
       <html>
       <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
       <title>session</title>
       </head>
       <body>
       <%
           Object data = request.getSession().getAttribute("data");
           PrintWriter writer = response.getWriter();
           if(data==null){
               request.getSession().setAttribute("data", "redis!");
               writer.write("not session!");
           } else {
               writer.write(data.toString());
           }
           writer.flush();
           writer.close();
       %>
       </body>
       </html>
   II.
       a. 启动redis,tomcat,访问session.jsp
       b. 停止tomcat,再访问session.jsp
       c. 查看redis里的数据，看session是否存在

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