问题
I would like to negate a set of words using java regex.
Say, I want to negate cvs, svn, nvs, mvc. I wrote a regex which is ^[(svn|cvs|nvs|mvc)].
Some how that seems not to be working.
回答1:
Try this:
^(?!.*(svn|cvs|nvs|mvc)).*$
this will match text if it doesn't contain one of svn, cvs, nvs or mvc.
This is a similar question: C# Regex to match a string that doesn't contain a certain string?
回答2:
It's not that simple. If you want to negate a word you have to split it to letters and negate each letter.
so to negate
/svn/
you have to write
/[^s][^v][^n]/
So what you want to filter out will turn into really ugly regex and I think it's better idea to use this regex
/svn|cvs|nvs|mvc/
and when you test your string against it, just negate the result.
In JS this would look more less like that:
!/svn|cvs|nvs|mvc/.test("this is your test string");
回答3:
Your regex is wrong. Between square brackets, you can put characters to require or to ignore. If you don't find ^(svn|cvs|nvs|mvc)$, you're fine.
来源：https://stackoverflow.com/questions/1333540/negating-a-set-of-words-via-java-regex