通过java正则表达式否定一组单词
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Negating a set of words via java regex
提问by Abhishek
I would like to negate a set of words using java regex.
我想使用 java regex 否定一组单词。
Say, I want to negate cvs, svn, nvs, mvc. I wrote a regex which is ^[(svn|cvs|nvs|mvc)].
说，我想否定cvs, svn, nvs, mvc。我写了一个正则表达式，它是^[(svn|cvs|nvs|mvc)].
Some how that seems not to be working.
一些如何这似乎不起作用。
采纳答案by Kamarey
Try this:
尝试这个：
^(?!.*(svn|cvs|nvs|mvc)).*$
this will match text if it doesn't contain one of svn, cvs, nvs or mvc.
如果文本不包含 svn、cvs、nvs 或 mvc 之一，这将匹配文本。
This is a similar question: C# Regex to match a string that doesn't contain a certain string?
这是一个类似的问题：C# Regex 匹配不包含某个字符串的字符串？
回答by RaYell
It's not that simple. If you want to negate a word you have to split it to letters and negate each letter.
没那么简单。如果你想否定一个词，你必须把它分成几个字母并否定每个字母。
so to negate
所以否定
/svn/
you have to write
你必须写
/[^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
所以你想过滤掉的东西会变成非常丑陋的正则表达式，我认为最好使用这个正则表达式
/svn|cvs|nvs|mvc/
and when you test your string against it, just negate the result.
当您针对它测试字符串时，只需否定结果即可。
In JS this would look more less like that:
在 JS 中，这看起来更不像这样：
!/svn|cvs|nvs|mvc/.test("this is your test string");
回答by pvoosten
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)$, you're fine.
你的正则表达式是错误的。在方括号之间，您可以放置需要或忽略的字符。如果你没有找到^(svn|cvs|nvs|mvc)$，你就没事。
