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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">3051</span></span>  </p> </article><article class="excerpt"> <header> <a title="CSS" class="label label-important zj-del-target" href="/category/68">CSS<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/11716" title="16 个新鲜的 CSS3 在线教程" target="_blank" onclick="return recordId('',)">16 个新鲜的 CSS3 在线教程 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/11716" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/2.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/11716';}else{window.open('/article/11716');}" style="cursor: pointer;">用CSS3制作令人印象深刻的产品展示使用jQuery和CSS3制作闪亮的旋钮控制使用CoffeeScript创建一个类iOS的界面使用CSS3制作报纸阅读制作一个CSS3动画菜单使用jQuery和CSS3制作更好的元素选择CSS3多级菜单，具有动画效果制作你的第一个Chrome扩展BounceBox提示插件色彩多样的滑动块使用jQuery和CSS3创建一个音频播放器CSS3和jQuery项目的模糊效果CSS3制作的动画按钮CSS3制作的圆形导航效果创建一个</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 09:29:55</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3051</span></span>  </p> </article><article class="excerpt"> <header> <a title="Python" class="label label-important zj-del-target" href="/category/44">Python<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/26685" title="python安装mysql的依赖包mysql-python" target="_blank" onclick="return recordId('',)">python安装mysql的依赖包mysql-python </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/26685" 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/26685';}else{window.open('/article/26685');}" style="cursor: pointer;">一般情况下，使用pip命令安装即可：[root@dthost27~]#pipinstallmysql-python但是在实际工作环境中，往往会安装失败，这是因为系统缺少mysql的相关依赖组件。所以必须先安装mysql-devel类的包，而且必须要对应好mysql客户端的版本，即要安装好：[root@dthost27~]#rpm-ivhmysql-community-libs-5.7.23-1.el6.x86_64.rpmmysql-community-c</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">2019-09-27 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pointer;">defword_table_formater():fromwin32comimportclientword=client.Dispatch('Word.Application')doc=word.Documents.Open('C:\\Users\\Administrator\\Desktop\\test.docx')i=1fortableindoc.Tables:print(i,len(doc.Tables))#设置列宽table.Columns(1).</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">2019-09-27 17:45:49</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3050</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/17987" title="Android 四种launchMode" target="_blank" onclick="return recordId('',)">Android 四种launchMode </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/17987" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/12.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/17987';}else{window.open('/article/17987');}" style="cursor: pointer;">1,standard每次都会新建一个Activity实例2,singleTask栈空间简易示意:A--B--C最后用startActivity(intent)从C跳到A后，由于栈空间已经存在A的实例，A上面的ActivityB和C出栈（即onDestroy销毁），A置于栈顶如果A中重写了onNewIntent(...)方法，会同时接到C跳A的intent数据3,singTop栈空间简易示意:A--B--C最后用startActivity(intent)从C</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 23:00:33</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3050</span></span>  </p> </article><article class="excerpt"> <header> <a title="数据库相关" class="label label-important zj-del-target" href="/category/32">数据库相关<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/7224" title="update-alternatives命令详解" target="_blank" onclick="return recordId('',)">update-alternatives命令详解 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/7224" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/16.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/7224';}else{window.open('/article/7224');}" style="cursor: pointer;">转载:http://blog.csdn.net/maixia24/article/details/11707289update-alternatives是ubuntu系统中专门维护系统命令链接符的工具，通过它可以很方便的设置系统默认使用哪个命令、哪个软件版本，比如，我们在系统中同时安装了openjdk和sunjdk两个版本，而我们又希望系统默认使用的是sunjdk，那怎么办呢？通过update-alternatives就可以很方便的实现了。sudoupda</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 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