使用 Jsoup 提取具有相似类的跨度

Question

从这样的事情...

<Head>
 <Body>
  <div id="content-wrap" class="relative right-side-nav">
        ...
<tr>
            <td class="indent"><span>Mean Temperature</span></td>
        <td>
  <span class="wx-data"><span class="wx-value">55*</span><span class="wx-  unit">&nbsp;°F</span></span>
</td>
        <td>

</td>
        <td>&nbsp;</td>
        </tr>

<tr>
        <td class="indent"><span>Max Temperature</span></td>
        <td>
  <span class="wx-data"><span class="wx-value">66</span><span class="wx-unit">&nbsp;°F</span></span>
</td>
        <td>
  <span class="wx-data"><span class="wx-value">59</span><span class="wx-unit">&nbsp;°F</span></span>
</td>
        <td>

 </td>
        </tr>

我想获得“*”即 55 处的平均温度值不是 66 或 59 我该怎么做？

Answer 1

我向您分享了 this post, yet for a better performance you'd use xPath approach 中稍作修改的代码。

<?php
$curl = curl_init('<url of interest>');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);

$page = curl_exec($curl);

if(curl_errno($curl)) // check for execution errors
{
    echo 'Scraper error: ' . curl_error($curl);
    exit;
}

curl_close($curl); 
$regex = '#<span class="wx-value">(.*?)<\/span>#gs';
if ( preg_match_all($regex, $page, $list) )
    print_r($list);
else 
    print "Not found"; 
?>

稍后您可以通过添加 (int) 符号将捕获的值从 55* 细化为 55：(int)$list[0].

使用 Jsoup 提取具有相似类的跨度

Use Jsoup to extract a span with similar classes

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使用 Jsoup 提取具有相似 类 的跨度

Use Jsoup to extract a span with similar classes

html

html-table

extraction

web-scraping

jsoup

使用 Jsoup 提取具有相似类的跨度