如何为以下内容创建 JSOUP 选择器

Question

例如，我想提取本文中的文本 HTML：

    <div class="description">
            <div style="clear: none;" class="post-fb-like">
              <fb:like class=" fb_edge_widget_with_comment fb_iframe_widget" href="http://mashable.com/2011/08/07/3-handy-mobile-apps/" send="true" width="625" height="61"><span><iframe src="http://www.facebook.com/plugins/like.php?api_key=116628718381794&amp;channel_url=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%3Fversion%3D3%23cb%3Df138585052991e8%26origin%3Dhttp%253A%252F%252Fmashable.com%252Ff15a8eb75cc2b58%26relation%3Dparent.parent%26transport%3Dpostmessage&amp;href=http%3A%2F%2Fmashable.com%2F2011%2F08%2F07%2F3-handy-mobile-apps%2F&amp;layout=standard&amp;locale=en_US&amp;node_type=link&amp;sdk=joey&amp;send=true&amp;show_faces=true&amp;width=625" class="fb_ltr" title="Like this content on Facebook." style="border: medium none; overflow: hidden; height: 29px; width: 625px;" name="f2d40595a65cf36" id="f24fece5e565ec4" scrolling="no"></iframe></span></fb:like>
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                        <p><img src="http://ec.mashable.com/wp-content/uploads/2009/01/bizspark2.gif" alt="" align="left"><em>The <a href="http://mashable.com/tag/bizspark">Spark of Genius Series</a> highlights a unique feature of startups and is made possible by <a rel="nofollow" href="http://www.microsoftstartupzone.com/BizSpark/Pages/At_a_Glance.aspx?WT.mc_id=MSZ_Mashable_posts" target="_blank">Microsoft BizSpark</a>. If you would like to have your startup considered for inclusion, please see the details <a href="http://mashable.com/bizspark/">here</a>.</em></p>

<p><img src="http://5.mshcdn.com/wp-content/uploads/2011/08/mobile-devices.jpg" alt="" title="mobile devices" class="alignright" height="141" width="225">Each <a href="http://mashable.com/follow/topics/startup-weekend-roundup">weekend</a>, <em>Mashable</em> hand-picks startups we think are building interesting, unique or niche products. </p>
<p>This week, we’ve rounded up startups making mobile applications that bridge the physical and digital worlds for improved communication and enhanced experiences. </p>
<p>TransFire breaks down global communication barriers with its instant and automatic translation capabilities, while Babbleville facilitates neighbor-to-neighbor communication around events or topics. And, Picdish uses time and place to bring friends together over shared mobile food experiences.</p>
<hr>

我也想从另一个 HTML 页面中提取文本，但它的格式不同。我想从 http://www.cnn.com/2011/WORLD/europe/08/12/uk.riots.dan.rivers/index.html?hpt=hp_c2

我该怎么办创建一个选择器来提取文本，无论给出哪个文章网址？

Answer 1

无论给出哪个文章网址，我如何创建一个选择器来提取文本？

你不能。所有网站都有自己的 HTML 结构。自己在网络浏览器中打开页面，右键单击并查看源代码。看。您应该为每个单独的网站创建一个单独的选择器。

对于第一个示例，假设它是整个 HTML，因此文本位于这些

标记内。然后，您可以使用

Document html = Jsoup.parse(yourHtmlString);
Elements paragraphs = html.select("p");
String text = paragraphs.text();
// ...

For your CNN site，根据您想要获取

的所有

的 HTML 源>，所以这个选择器应该这样做：

Document document = Jsoup.connect("http://www.cnn.com/2011/WORLD/europe/08/12/uk.riots.dan.rivers/index.html?hpt=hp_c2").get();
Elements paragraphs = document.select(".cnn_strycntntlft p");
String text = paragraphs.text();
// ...

顺便说一下，使用他们的 RSS 提要而不是解析整个 HTML 会更容易。许多新闻网站都为此目的提供 RSS 源。