尝试使用 reg ex 获取基本 url
我需要匹配“基本”url，我的意思是：
Not match --> http://google.com
Not match --> http://www.google.com
Not match --> www.google.com
Match! --> google.com
我试图使用反向查找来确保没有 http:// 或 www，但它似乎无法正常工作。
I need to match the "base" url, what I mean is:
Not match --> http://google.com
Not match --> http://www.google.com
Not match --> www.google.com
Match! --> google.com
I was trying to use a negative look behind to make sure there was no http:// or www, but it didn't seem to work correctly.
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这必须仅使用一个正则表达式吗？
您可以使用第一个与找到的所有 URL 相匹配的正则表达式。像这样的事情：
然后过滤所有匹配项并保留与以下内容不匹配的匹配项：
虽然说实话，我不会使用正则表达式，除非这是绝对必要的。
注意：
您始终可以找到更好的正则表达式来匹配 URL。这里的问题是它们可能不以
http://或www开头，因此我们不能对正则表达式限制太多。准备好其他根本不是 URL 的匹配，例如：I was there Saturday.but no one saw me中的yesterday.butDo this has to be with only one regex?
You could have the first regex that will match all URLs found. Something like that:
And then filter all matches and keep the ones that do not match the following:
although to be honest, I wouldn't use Regex unless it is strictly necessary for that.
Note:
You can always find a better regex to match the URLs. The thing here is that they may not start with
http://orwww, so we can't restrict the regex so much. Be ready to have other matches that are not urls at all, like:yesterday.butinI was there yesterday.but no one saw me