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以一种"廉价"的方式获取页面的标题(downmoon)

有朋友问到：“我需要得到一个webpage的title，因为这个title一般都比较靠前，只要取得html的前面少量内容就可以了。因为要取得很多个页面的title,如果下载整个htmlcode，肯定比较浪费时间。.net好像没有现成的类可以干这件事情(取得部分html)，我应该如何去实现？”一种比较"廉价"(即较小成本条件下)的解决思路：第一步：取出含有页面title部分的最小集合。这是“廉价”的关键！第二步：用正则表达式取出和</title</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:21:16</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">2951</span></span>  </p> </article><article class="excerpt"> <header> <a title="Android" class="label label-important zj-del-target" href="/category/57">Android<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/14180" title="android内核编译方法" target="_blank" onclick="return recordId('',)">android内核编译方法 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/14180" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/17.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/14180';}else{window.open('/article/14180');}" style="cursor: pointer;">google的android很多人都希望在gphone没有出来之前，把它移植到相关的硬件平台上去。网上看了不少文章，总的感觉是：在这一步走得最远的就是openmoko的一个大师级别的黑客Ben“Benno”Leslie,他曾经试图把目前google发布的android移植到openmoko的平台上去，并且做了10000多行代码的尝试。最终虽然由于openmoko采用比较老的arm920t的内核，而android采用较新的arm926-ej-s内核，而且使用</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:12:47</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">2951</span></span>  </p> </article><article class="excerpt"> <header> <a title="MySql" class="label label-important zj-del-target" href="/category/47">MySql<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/600" title="Mysql编写定时任务事件" target="_blank" onclick="return recordId('',)">Mysql编写定时任务事件 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/600" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/19.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/600';}else{window.open('/article/600');}" style="cursor: pointer;">原文:Mysql编写定时任务事件场景：例如：某系统，用户每天只能拥有一次的抽奖机会，抽过后当天就不可再抽，但是过了24：00点后用户就重新拥有一次抽奖机会。像这种需要数据库定时对某个字段进行更新操作的任务，完全可以通过数据库本身的事件机制进行操作，而服务器端也不需要用额外的代码进行这种监控定时的操作。Mysql:本文讨论的是Mysql数据库，EventScheduler事件调度器应该是在Mysql5.1引入的，所以使用定时任务调度时，请注意查看你的Mysq</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:32:11</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">2951</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/20564" title="软件安全开发周期 - ＳＤＬ" target="_blank" onclick="return recordId('',)">软件安全开发周期 - ＳＤＬ </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/20564" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/20.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/20564';}else{window.open('/article/20564');}" style="cursor: pointer;"><iframealign="top"marginwidth="0"marginheight="0"src="http://www.zealware.com/csdnblog01.html"frameborder="0"width="728"scrolling="no"height="90"></iframe>申明。文章仅代表个人观点，与所在公司无任何联系。1.概述安全开发周期，即SecurityDevelopmentLifecycle(SDL)，是微软提出</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 23:34:08</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">2950</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/17443" title="ERP简介" target="_blank" onclick="return recordId('',)">ERP简介 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/17443" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/3.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/17443';}else{window.open('/article/17443');}" style="cursor: pointer;">一种ERP系统ERP是针对物资资源管理（物流）、人力资源管理（人流）、财务资源管理（财流）、信息资源管理（信息流）集成一体化的企业管理软件。一个由GartnerGroup开发的概念，描述下一代制造商业系统和制造资源计划（MRPII）软件。它将包含客户/服务架构，使用图形用户接口，应用开放系统制作。除了已有的标准功能，它还包括其它特性，如品质、过程运作管理、以及调整报告等。特别是，ERP采用的基础技术将同时给用户软件和硬件两方面的独立性从而更加容易升级。ER</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:53:50</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">2950</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/17347" title="IIS架构与HTTP请求处理流程（3）" target="_blank" onclick="return recordId('',)">IIS架构与HTTP请求处理流程（3） </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/17347" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/19.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/17347';}else{window.open('/article/17347');}" style="cursor: pointer;">ASP.NETWeb编程原理之IIS架构与HTTP请求处理流程（3）（续前文）8.1.4HTTP请求的处理过程在了解了IIS的架构之后，来看一下IIS架构中的各个组成部分是如何相互配合处理HTTP请求的。先来从总体上看看HTTP请求的处理过程（图8‑10）。<shapetypeid="_x0000_t75"stroked="f"filled="f"path="m@4@5l@4@11@9@11@9@5xe"o:preferrelative="t"o:spt=</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:52:39</span></span> <span 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