如何使用Java和Javascript清理字符串,使其只包含数字(0-9)和大写字母X。

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英文:

How can I cleanse a String to contain only digits (0-9) and the letter X (uppercase) only, using Java and Javascript

问题

我正在接受用户输入的ISBN号码 - 可能包含空格和连字符等,并尝试将其清理为仅包含数字。

在Java和JavaScript中,我已经成功地使用了以下正则表达式。

Java(isbn是java.lang.String)

isbn = isbn.replaceAll("[^\\d]", "");

JavaScript

isbn = isbn.replace(/[^\d]/g, "");

然而,一些ISBN号码的校验字符可以是X。例如,Sara Reinke的《The book of days》的ISBN号码是'155404295X'。

如何修改正则表达式以允许X以及数字?

更新:在JavaScript中,[^\dX] 起作用了,但是在Java中 [^\\dX] 不起作用。

更新2:问题出在用户(程序员)身上!我在两个地方进行了清理 - 我更新了一个地方但没有更新另一个地方。[^\\dX] 在Java中也是起作用的。

英文:

I am taking an ISBN input by the user - may contain spaces and hyphens etc. - and trying to sanitise it to be only digits.

In Java and Javascript, I have used the following regex successfully

Java (isbn is a java.lang.String)

isbn = isbn.replaceAll("[^\\d]", "");

and, JavaScript

isbn = isbn.replace(/[^\d]/g, "");

However, some ISBNs can have an X as their checksum character. For example, 'The book of days' by Sara Reinke is '155404295X'

How can I change the regex to allow X as well as digits?

Update: [^\dX] worked in JavaScript, but [^\\dX] does not work in Java.

Update 2: PEBKAC! I was sanitising in two places - I updated one but not the other. [^\\dX] does work in Java as well.

答案1

得分: 0

Sure, here's the translation:

你能在那里尝试使用[^0-9X]吗?我认为它在Java和JavaScript中都可以工作。
附:但是在Java中\\d也可以工作...

英文:

Can you try [^0-9X] there? I think it will work in both Java and JavaScript.
P.S. But \\d should work in Java too...

答案2

得分: 0

如果您想遵循您的解决方案,您可以使用?:(values)进行排除。
对于您的示例,应为:[^\d?:(X)],在在线Java正则表达式中进行了测试。

英文:

If you wanna follow your solution you can exclude with ?:(values)
For your example it would be: [^\d?:(X)] tested in online java regex.

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  • 本文由 发表于 2020年7月23日 20:04:36
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