从HTML提取链接 [英] Extracting links from HTML

问题描述

我正在尝试从HTML中提取链接.我正在使用以下正则表达式

I am trying to extract links from HTML. I am using the following regular expression

href=\"([^\"]*)\"

哪个正在提取不必要的链接.如何编写正则表达式以仅提取具有class ="l"之类的链接

Which is extracting unnecessary links. How can I write a regular expression to extract only links with class="l" like

<a href="http://users.elite.net/runner/jennifers/hello.htm" class="l">
<a href="http://www.hellodesign.com/" class="l">
<a href="http://www.ipl.org/div/hello/" class="l">

推荐答案

使用正则表达式解析HTML不必要地过于复杂.正则表达式是这项工作的错误工具.只需使用普通的HTML解析器，例如 Jsoup .它允许您通过常规 CSS选择器来选择HTML元素.

Parsing HTML with regex is unnecessarily overcomplicated. Regex is the wrong tool for the job. Just use a normal HTML parser like Jsoup. It allows you to select HTML elements by normal CSS selectors.

Document document = Jsoup.parse(html);
Elements links = document.select("a.l"); // Select all <a class="l"> elements.

for (Element link : links) {
    System.out.println(link.absUrl("href"));
}

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