java match url_Java Regex：如何匹配URL路径？(Java Regex: How to Match URL Path?)

Java Regex：如何匹配URL路径？(Java Regex: How to Match URL Path?)

我试图提取URL路径的第一部分。 例如：从http://foo.com/bar/1/2/3我想提取bar 。 这是我正在使用的代码：

private static String getFirstPartOfPath(String url)

{

Pattern pattern = Pattern.compile("^https?://[^/]+/([^/]+)/*$");

Matcher matcher = pattern.matcher(url);

if(matcher.find())

{

System.out.println(matcher.group(1));

}

return null;

}

但是，这与上面列出的最琐碎的网址不匹配，如

public static void main(String[] args)

{

getFirstPartOfPath("http://foo.com/bar/1/2/3");

}

没有打印。 乍一看，模式字符串看起来很清晰，就像它显然应该工作一样。 出了什么问题？

I am trying to extract the first part of the path of a URL. For example: from http://foo.com/bar/1/2/3 I want to extract bar. Here is the code I am using:

private static String getFirstPartOfPath(String url)

{

Pattern pattern = Pattern.compile("^https?://[^/]+/([^/]+)/*$");

Matcher matcher = pattern.matcher(url);

if(matcher.find())

{

System.out.println(matcher.group(1));

}

return null;

}

However, this does not match the most trivial url listed above, as in

public static void main(String[] args)

{

getFirstPartOfPath("http://foo.com/bar/1/2/3");

}

prints nothing. At first glance the pattern string seems clear and like it should obviously work. What is going wrong?

原文：https://stackoverflow.com/questions/24538991

2019-12-06 13:12

满意答案

不匹配࿰

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