正则表达式从HTML中提取文本 [英] regular expression to extract text from HTML

问题描述

我想从一般HTML页面中提取所有文本（显示与否）。

我想删除

• 任何HTML标记


• 任何javascript


• 任何CSS样式

是否有一个正则表达式（一个或多个）可以实现这一点？

你不能真正用正则表达式解析HTML。这太复杂了。 RE不会正确处理<！[CDATA []部分。此外，诸如& lt; text> 之类的一些常见的HTML文件可以在浏览器中作为正确的文本工作，但可能会导致难以理解的RE。

使用适当的HTML解析器，您会更快乐，更成功。 Python人通常使用美丽的汤来解析HTML并去掉标签和脚本。

---

另外，浏览器在设计上容忍格式错误的HTML。所以你经常会发现自己试图解析显然不合适的HTML，但在浏览器中恰好运行正常。

你可能能够用RE解析坏HTML。它只需要耐心和努力。但使用其他人的解析器通常更简单。

I would like to extract from a general HTML page, all the text (displayed or not).

I would like to remove

• any HTML tags
• Any javascript
• Any CSS styles

Is there a regular expression (one or more) that will achieve that?

解决方案

You can't really parse HTML with regular expressions. It's too complex. RE's won't handle <![CDATA[ sections correctly at all. Further, some kinds of common HTML things like <text> will work in a browser as proper text, but might baffle a naive RE.

You'll be happier and more successful with a proper HTML parser. Python folks often use something Beautiful Soup to parse HTML and strip out tags and scripts.

---

Also, browsers, by design, tolerate malformed HTML. So you will often find yourself trying to parse HTML which is clearly improper, but happens to work okay in a browser.

You might be able to parse bad HTML with RE's. All it requires is patience and hard work. But it's often simpler to use someone else's parser.

这篇关于正则表达式从HTML中提取文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！