如何从正则表达式生成与正则表达式匹配的文本？ [英] How do I generate text matching a regular expression from a regular expression?

问题描述

是的，你读得对。我需要能够从正则表达式生成随机文本的东西。所以文本应该是随机的，但要与正则表达式匹配。它似乎不存在，但我可能是错的。

只是一个例子：该库能够获取' [ab ] * c '作为输入，并生成如下样本：

abc

abbbc

bac

等。

更新：我自己创造了一些东西：Xeger。查看 http://code.google.com/p/xeger/ 。

解决方案

我刚刚创建了一个库来执行此操作。它位于此处： http://code.google.com/p/xeger/ 。使用前请仔细阅读说明。 （特别是指下载另一个必需的库。）; - ）

这是你使用它的方式：

  String regex =[ab] {4,6} c; 
 Xeger generator = new Xeger（正则表达式）; 
 String result = generator.generate（）; 
断言result.matches（正则表达式）; 
  

Yup, you read that right. I needs something that is capable of generating random text from a regular expression. So the text should be random, but be matched by the regular expression. It seems it doesn't exist, but I could be wrong.

Just a an example: that library would be capable of taking '[ab]*c' as input, and generate samples such as:

abc
abbbc
bac

etc.

Update: I created something myself: Xeger. Check out http://code.google.com/p/xeger/.

解决方案

I just created a library for doing this a minute ago. It's hosted here: http://code.google.com/p/xeger/. Carefully read the instructions before using it. (Especially the one referring to downloading another required library.) ;-)

This is the way you use it:

String regex = "[ab]{4,6}c";
Xeger generator = new Xeger(regex);
String result = generator.generate();
assert result.matches(regex);

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