求助：正则表达式匹配含3个斜杠的指定URL模式

Got it, let's break down what's going wrong with your current regex and build the correct pattern for your needs.

Your Requirements Recap #

You want to match URLs that:

• Start with abc.org/top/
• Follow with one or more digits
• End with a final segment with no extra slashes (exactly 3 slashes total in the URL, like your valid examples)
• Reject URLs with extra path segments (more than 3 slashes) or that start with a different base path like bottoms

The Issue With Your Current Regex #

Your pattern abc\.org\/top\/[0-9]+\/(.*)$ has one critical flaw: the (.*) will match any character, including slashes. That means it would accidentally match URLs with extra path segments (like your failed example abc.org/top/1567/gree-0109/size), and depending on your testing setup, might not anchor the match correctly to the start/end of the URL.

The Corrected Regex #

Here's the pattern that will work exactly as you need:

^abc\.org\/top\/[0-9]+\/[^\/]+$

Let's break down each part:

• ^: Anchors the match to the start of the string, ensuring there's no extra content before abc.org
• abc\.org: Matches the domain (the backslash escapes the dot, which otherwise matches any character in regex)
• \/top\/: Matches the /top/ path segment (slashes are escaped for compatibility with most regex engines)
• [0-9]+: Matches one or more digits (you can also use \d+ as a shorthand here)
• \/: Matches the third slash
• [^\/]+: Matches one or more characters that are NOT slashes — this ensures the final segment has no extra path parts
• $: Anchors the match to the end of the string, so no extra characters (like another slash or path segment) can come after

Testing the Pattern #

Let's verify against your examples:

• ✅ Matches: abc.org/top/1010/red-shirt-plus → fits the exact structure
• ✅ Matches: abc.org/top/1567/gree-0109 → fits the exact structure
• ❌ Rejects: abc.org/top/1567/gree-0109/size → has an extra slash and segment, which [^\/]+ won't match (since it hits a slash before the end of the string)
• ❌ Rejects: abc.org/bottoms/1567/red-skirt-plus → doesn't start with /top/

Bonus: Matching Full URLs (with HTTP/HTTPS) #

If you need to match full URLs with http:// or https:// prefixes, add an optional protocol segment at the start:

^(https?:\/\/)?abc\.org\/top\/[0-9]+\/[^\/]+$

The (https?:\/\/)? part matches an optional http:// or https:// (the ? makes the whole group optional, and s? makes the s in https optional).

内容的提问来源于stack exchange，提问作者Helen