Javascript正则表达式匹配文件名和扩展名 [英] Javascript regex match filename with extension

问题描述

您好，我需要将文件名与扩展名匹配.

Hello i need to match filnames with extensions.

问题是路径可以是 unix 和 windows，所以用/或 \ 分隔，unix 也允许 .在文件名中，所以 t.est.txt 也应该匹配.

Problem is that paths could be both unix and windows, so seperated by / or \ also unix allows . in filenames, so t.est.txt also should be matched.

我的代码:

var regex = new RegExp('[\\/]?([/\w+.]+/\w+)/\s*$');
var value = this.attachment.fileInput.dom.value;
console.log(value.match(regex));
console.log(regex.exec(value));

这个正则表达式在 rubular 中运行良好.但是由于某种原因，即 chrome 和 firefox 不匹配任何字符串并返回 null.

this regex works fine in rubular. But for some reason ie, chrome and firefox does not match any string and returns null.

推荐答案

你可以只抓取最后一个 \ 或 / 后面的任何内容，例如:

You could just grab whatever's at the end following the last \ or /, such as:

var file = str.match(/[^\\/]+$/)[0];

(记住文件并不总是需要扩展名)

(Remember files don't always need extensions)

如果你真的想强制扩展匹配:

Though if you really want to force extension matching:

var file = str.match(/[^\\/]+\.[^\\/]+$/)[0];

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