Java：用\'替换字符串中的所有' [英] Java: Replace all ' in a string with \'

问题描述

我需要在字符串中转义所有引号（'），因此它变为\'

I need to escape all quotes (') in a string, so it becomes \'

我尝试过使用replaceAll，但它没有做任何东西。出于某种原因，我无法使正则表达式工作。

I've tried using replaceAll, but it doesn't do anything. For some reason I can't get the regex to work.

我正在尝试

String s = "You'll be totally awesome, I'm really terrible";
String shouldBecome = "You\'ll be totally awesome, I\'m really terrible";
s = s.replaceAll("'","\\'"); // Doesn't do anything
s = s.replaceAll("\'","\\'"); // Doesn't do anything
s = s.replaceAll("\\'","\\'"); // Doesn't do anything

我真的被困在这里，希望有人能在这里帮助我。

I'm really stuck here, hope somebody can help me here.

谢谢，

Iwan

推荐答案

你必须首先转义反斜杠，因为它是一个文字（产生 \\ ），然后因为正则表达式再次转义它（产生 \\\\ ）。所以，试试：

You have to first escape the backslash because it's a literal (yielding \\), and then escape it again because of the regular expression (yielding \\\\). So, Try:

 s.replaceAll("'", "\\\\'");

输出：

You\'ll be totally awesome, I\'m really terrible

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