regex - 简单的正则表达式否定

Question

我在使用正则表达式时遇到问题，所以我想我会在这里问。基本上，我需要它来匹配一个集合的 URI，除了某个（/new）。

IE：

/properties     # match
/properties/25  # match
/properties/new # rejected

我尝试了以下变体，但无济于事：

/properties(^(/new)).*

我认为我的麻烦在于否定，但我不能完全理解我的意思是做什么..对解决方案的解释将不胜感激！

Answer 1

^ negates inside a character class (a group of characters in any order surrounded by [ ]. You need to use ?!. You also shouldn't use .*. It doesn't add anything. If you want to match anything you just don't put anything :). Also you don't need to capture the match. Depending on how you're setting it up you may also need to escape the slashes ( / )

Try this:

\/properties(?!\/new)

Answer 2

Answer 3

How about this one:

/properties(?!/new)(?:/.*){0,1}

the: `(?!/new) is a negative forward lookup, and essentially says: make sure this cannot be matched

the following: (?:/.+){0,1} allows for the matching of additional paths (ie. /25) and is a non-capturing group that says match / followed by zero or more characters, and match it zero to one times as a group. The {0,1} allows it to match even if there is no /25.