regex - 如何在正则表达式中匹配多个字符？

Question

我有字符串

7,456.23%

我想使用正则表达式来匹配逗号(，)和百分号(％)字符并删除它们，因此结果是

7456.23

我可以弄清楚如何匹配一个字符或另一个字符，但不能同时匹配两个字符。

Answer 1

只需使用Character Classes or Character Sets

With a "character class", also called "character set", you can tell the regex engine to match only one out of several characters.

只需将要匹配的字符放在方括号之间即可。如果您想匹配 a 或 e，请使用 [ae]。

System.out.println("7,456.23%".replaceAll("[,%]",""));

或者尝试使用 ORing ( Alternation Operator )

System.out.println("7,456.23%".replaceAll(",|%",""));