redis+tomcat7實現session共享
阿新 • • 發佈：2019-02-17
其實很簡單，就幾個步驟：
1.配置Tomcat的conf目錄下的context.xml檔案：
1> 單點Reids配置
<code class="hljs xml has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!--
Jedis save session
--></span>
<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">Valve</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">className</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve"</span> /></span>
<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">Manager</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">className</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.orangefunction.tomcat.redissessions.RedisSessionManager"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">host</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">port</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"6379"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">database</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"0"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">maxInactiveInterval</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"60"</span>/></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li></ul>2> Sentinel叢集配置：
<code class="hljs xml has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!-- Sentinel 配置 --></span>
<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">Valve</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">className</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve"</span> /></span>
<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">Manager</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">className</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.orangefunction.tomcat.redissessions.RedisSessionManager"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">maxInactiveInterval</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"60"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">sentinelMaster</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mymaster"</span>
<span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">sentinels</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"127.0.0.1:26379,127.0.0.1:26380,127.0.0.1:26381,127.0.0.1:26382"</span>
/></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li></ul>2.新增jar
3.測試
1>
儲存Session：
<code class="hljs cs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">doPost</span>(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"hello"</span>);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//取得Session物件</span>
HttpSession session=request.getSession();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//設定Session屬性</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> i=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;i<<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100000</span>;i++){
session.setAttribute(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>+i, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Magci_"</span>+i);
}
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li></ul>2>重啟Tomcat：假如Session儲存在tomcat下，重啟後Session不存在；如果儲存在Redis下，Tomcat重啟對Session無影響
3>取出Session：
<code class="hljs cs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">doPost</span>(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"hello"</span>);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//取得Session物件</span>
HttpSession session=request.getSession();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//取出Session屬性</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> i=<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;i<<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100000</span>;i++){
System.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.println(session.getAttribute(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>+i));
}
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li></ul>
注意事項：從Tomcat6開始預設開啟了Session持久化設定，測試時可以關閉本地Session持久化，其實也很簡單，在Tomcat的conf目錄下的context.xml檔案中，取消註釋下面那段配置即可：
<code class="hljs xml has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!-- Uncomment this to disable session persistence across Tomcat restarts --></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!--
<Manager pathname="" />
--></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>
可以嘗試執行上面的demo案例！