如何匹配文件不以正则表达式结尾

Question

I am trying to filter all files not ending with, for instance mp3 or wv .
I have tried to use something like this ^.*(?<![mp3|wv])$ but this expression doesn't work.
Please help to create valid expression.

Answer 1

您可以改用负前瞻。

^(?!.*(?:mp3|wv)$).*

Answer 2

Since a lookbehind is a zero-width assertion, you can write:

^.*(?<!mp3)(?<!wv)$

or better ($ is a zero-width assertion too):

^.*$(?<!mp3)(?<!wv)

if your regex flavor allows it (PCRE, Java), you can use an alternation:

^.*$(?<!mp3|wv)

Note: if your goal is only to know if a string doesn't end with "vw" or "mp3", you can test if (?:mp3|wv)$ is false.