如何替换Java中的不区分大小写的字符串子字符串(How to replace case

如何替换Java中的不区分大小写的字符串子字符串(How to replace case-insensitive literal substrings in Java)

在String中使用方法replace(CharSequence target, CharSequence replacement) ，如何使目标不区分大小写？

例如，它现在的工作方式：

String target = "FooBar"; target.replace("Foo", "") // would return "Bar" String target = "fooBar"; target.replace("Foo", "") // would return "fooBar"

如何使其替换（或者如果有更合适的方法）是不区分大小写的，以便两个示例返回“Bar”？

Using the method replace(CharSequence target, CharSequence replacement) in String, how can I make the target case-insensitive?

For example, the way it works right now:

String target = "FooBar"; target.replace("Foo", "") // would return "Bar" String target = "fooBar"; target.replace("Foo", "") // would return "fooBar"

How can I make it so replace (or if there is a more suitable method) is case-insensitive so that both examples return "Bar"?

最满意答案

String target = "FOOBar"; target = target.replaceAll("(?i)foo", ""); System.out.println(target);

输出：

Bar

值得一提的是， replaceAll将第一个参数视为正则表达式，这可能会导致意想不到的结果。 为了解决这个问题，还可以使用Pattern.quote来评论。

String target = "FOOBar"; target = target.replaceAll("(?i)foo", ""); System.out.println(target);

Output:

Bar

It's worth mentioning that replaceAll treats the first argument as a regex pattern, which can cause unexpected results. To solve this, also use Pattern.quote as suggested in the comments.