Tomcat7+Redis存储Session-优快云博客

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.youkuaiyun.com/caiwenfeng_for_23/article/details/45511007

我的案例下载：http://download.youkuaiyun.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

<code class="hljs xml has-numbering">    <span class="hljs-comment"><!-- 
    Jedis save session
    --></span>
    <span class="hljs-tag"><<span class="hljs-title">Valve</span> <span class="hljs-attribute">className</span>=<span class="hljs-value">"com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve"</span> /></span>        
    <span class="hljs-tag"><<span class="hljs-title">Manager</span> <span class="hljs-attribute">className</span>=<span class="hljs-value">"com.orangefunction.tomcat.redissessions.RedisSessionManager"</span> 
        <span class="hljs-attribute">host</span>=<span class="hljs-value">"localhost"</span> 
        <span class="hljs-attribute">port</span>=<span class="hljs-value">"6379"</span> 
        <span class="hljs-attribute">database</span>=<span class="hljs-value">"0"</span> 
        <span class="hljs-attribute">maxInactiveInterval</span>=<span class="hljs-value">"60"</span>/></span></code><ul style="display: block;" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li></ul>

2> Sentinel集群配置：

<code class="hljs xml has-numbering">        <span class="hljs-comment"><!-- Sentinel 配置 --></span>
     <span class="hljs-tag"><<span class="hljs-title">Valve</span> <span class="hljs-attribute">className</span>=<span class="hljs-value">"com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve"</span> /></span>        
    <span class="hljs-tag"><<span class="hljs-title">Manager</span> <span class="hljs-attribute">className</span>=<span class="hljs-value">"com.orangefunction.tomcat.redissessions.RedisSessionManager"</span> 
        <span class="hljs-attribute">maxInactiveInterval</span>=<span class="hljs-value">"60"</span>
        <span class="hljs-attribute">sentinelMaster</span>=<span class="hljs-value">"mymaster"</span>
        <span class="hljs-attribute">sentinels</span>=<span class="hljs-value">"127.0.0.1:26379,127.0.0.1:26380,127.0.0.1:26381,127.0.0.1:26382"</span>
        /></span></code><ul style="display: block;" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li></ul>

2.添加jar

这里写图片描述

3.测试

1>
存储Session：

<code class="hljs cs has-numbering">    <span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">doPost</span>(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.<span class="hljs-keyword">out</span>.println(<span class="hljs-string">"hello"</span>);
           <span class="hljs-comment">//取得Session对象</span>
        HttpSession session=request.getSession(); 
        <span class="hljs-comment">//设置Session属性</span>
        <span class="hljs-keyword">for</span>(<span class="hljs-keyword">int</span> i=<span class="hljs-number">0</span>;i<<span class="hljs-number">100000</span>;i++){
            session.setAttribute(<span class="hljs-string">"name"</span>+i, <span class="hljs-string">"Magci_"</span>+i); 
        }
    }</code><ul style="display: block;" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li></ul>

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：

<code class="hljs cs has-numbering">    <span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">doPost</span>(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.<span class="hljs-keyword">out</span>.println(<span class="hljs-string">"hello"</span>);
           <span class="hljs-comment">//取得Session对象</span>
        HttpSession session=request.getSession(); 
        <span class="hljs-comment">//取出Session属性</span>
        <span class="hljs-keyword">for</span>(<span class="hljs-keyword">int</span> i=<span class="hljs-number">0</span>;i<<span class="hljs-number">100000</span>;i++){
            System.<span class="hljs-keyword">out</span>.println(session.getAttribute(<span class="hljs-string">"name"</span>+i));
        }
    }</code><ul style="display: block;" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li></ul>

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：

<code class="hljs xml has-numbering">    <span class="hljs-comment"><!-- Uncomment this to disable session persistence across Tomcat restarts --></span>
    <span class="hljs-comment"><!--
    <Manager pathname="" />
    --></span></code><ul style="display: block;" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul>

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！