正则表达式替换不在引号内的字符串（单引号或双引号） [英] Regex to replace a string not within quotes (single or double)

问题描述

我有一个输入字符串

this或that or或'this or that'

this or "that or" or 'this or that'

应转换为

this || 那或|| 这或那个

this || "that or" || "this or that"

因此尝试在字符串中查找字符串（或）的出现并将其替换为另一个字符串（||）。我尝试了以下代码

So the attempt is to look for an occurence of a string ( or ) within a string and replace it with another string ( || ). I have tried the following code

Pattern.compile("( or )(?:('.*?'|\".*?\"|\\S+)\\1.)*?").matcher("this or \"that or\" or 'this or that'").replaceAll(" || ")

输出

this || 那或|| '这||那个'

this || "that or" || 'this || that'

问题是单引号中的字符串也被替换了。
至于代码，样式只是一个例子。我会编译模式并在我开始工作时重复使用它。

The problem being that string within the single quote was also replaced. As for the code, the style is just for an example. I would compile the pattern and reuse it when I get this to work.

推荐答案

试试这个正则表达式： -

Try this regex: -

"or(?=([^\"']*[\"'][^\"']*[\"'])*[^\"']*$)"

匹配或后跟任意字符后跟一定数量的对 或'，后跟任意字符直到结束。

It matches or which is followed by any characters followed by a certain number of pairs of " or ', followed by a any characters till the end.

String str = "this or \"that or\" or 'this or that'";
str = str.replaceAll("or(?=([^\"']*[\"'][^\"']*[\"'])*[^\"']*$)", "||");        
System.out.println(str);

输出： -

this || "that or" || 'this or that'

---

上述正则表达式也将取代或，如果您与和'不匹配。

---

The above regex will also replace or, if you have a mismatch of " and '.

例如： -

"this or \"that or\" or \"this or that'"

它将取代或也适用于上述字符串。如果您希望在上述情况下不替换它，可以将正则表达式更改为： -

It will replace or for the above strings also. If you want it not to replace in the above case, you can change the regex to: -

str = str.replaceAll("or(?=(?:[^\"']*(\"|\')[^\"']*\\1)*[^\"']*$)", "||");

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