How to escape text for regular expression in Java

2018-06-27 11:10:51

Does Java have a built-in way to escape arbitrary text so that it can be included in a regular expression? For example, if my users enter "$5", I'd like to match that exactly rather than a "5" after the end of input.

从Java 1.5开始，是的：

Pattern.quote("$5");

在我看到下面的例子之前， Pattern.quote和Matcher.quoteReplacement之间的Matcher.quoteReplacement并不清楚

s.replaceFirst(Pattern.quote("text to replace"), 
               Matcher.quoteReplacement("replacement text"));

回应可能为时已晚，但您也可以使用Pattern.LITERAL ，它可以在格式化时忽略所有特殊字符：

Pattern.compile(textToFormat, Pattern.LITERAL);

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