如何在Java中替换不区分大小写的文字子串 [英] How to replace case-insensitive literal substrings in Java
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问题描述
在String中使用替换(CharSequence目标,CharSequence替换)
方法,如何使目标不区分大小写?
Using the method replace(CharSequence target, CharSequence replacement)
in String, how can I make the target case-insensitive?
例如,它现在的工作方式:
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"
如何使它如此替换(或者如果有更合适的方法)不区分大小写,以便两个示例都返回Bar?
How can I make it so replace (or if there is a more suitable method) is case-insensitive so that both examples return "Bar"?
推荐答案
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模式,这可能会导致意外结果。要解决此问题,还可以使用 Pattern.quote
,如评论中所示。
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.
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