如何使用正则表达式匹配所有数字字符和某些单个字符 [英] How to match all numerical characters and some single characters using regex

问题描述

如何使用正则表达式匹配字符串中的所有数字和特定字符?到目前为止，我有这个

How can I match all numbers along with specific characters in a String using regex? I have this so far

if (!s.matches("[0-9]+")) return false;

我对正则表达式不太了解，但是它可以匹配0-9之间的所有字符，现在我需要能够匹配其他特定字符，例如"/"，:"，"$"

I don't understand much regex, but this matches all characters from 0-9 and now I need to be able to match other specific characters, for example "/", ":", "$"

推荐答案

您可以将其他需要匹配的字符添加到字符组的末尾，如下所示:

You can add the other characters that you need to match to the end of the character group, like this:

if (!s.matches("[0-9/:$]+")) return false;

您需要注意以下几点:

• 如果 ^ 是字符中的字符，则不能是该组中的第一个字符
• 如果-在字符中，则它必须是组中的最后一个字符
• 如果] 位于字符之间，则对于regex和Java需要对其进行转义，例如 [\\]]
• 如果 \ 位于字符之间，则对于regex和Java需要对其进行转义，例如 [\\\\]

• If ^ is among the characters, it must not be the first one of the group
• If - is among the characters, it must be the last one in the group
• If ] is among the characters, it needs to be escaped for regex and for Java, e.g. [\\]]
• If \ is among the characters, it needs to be escaped for regex and for Java, e.g. [\\\\]

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