正则表达式 - 如何匹配除特定模式之外的所有内容 [英] Regex - how to match everything except a particular pattern

问题描述

如何编写一个正则表达式来匹配任何不符合特定模式的字符串?我面临着必须匹配 (A 和 ~B) 模式的情况.

How do I write a regex to match any string that doesn't meet a particular pattern? I'm faced with a situation where I have to match an (A and ~B) pattern.

推荐答案

您可以使用前瞻断言:

(?!999)\d{3}

此示例匹配 999 以外的三个数字.

This example matches three digits other than 999.

但如果您碰巧没有使用此功能的正则表达式实现(请参阅正则表达式风味的比较)，您可能需要自己构建具有基本功能的正则表达式.

But if you happen not to have a regular expression implementation with this feature (see Comparison of Regular Expression Flavors), you probably have to build a regular expression with the basic features on your own.

仅具有基本语法的兼容正则表达式为:

A compatible regular expression with basic syntax only would be:

[0-8]\d\d|\d[0-8]\d|\d\d[0-8]

这也匹配任何不是 999 的三位数字序列.

This does also match any three digits sequence that is not 999.

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