javascript Javascript正则表达式匹配文件名和扩展名

Javascript regex match filename with extension

提问by kuldarim

Hello i need to match filnames with extensions.

您好，我需要将文件名与扩展名匹配。

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.

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。

My code :

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));

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

这个正则表达式在rubular 中工作正常。但出于某种原因，即 chrome 和 firefox 不匹配任何字符串并返回 null。

回答by VisioN

Try the following syntax:

尝试以下语法：

var filename = (value.match(/[^\/]+\.[^\/]+$/) || []).pop();

It should work fine for the following examples:

对于以下示例，它应该可以正常工作：

"path/to/file.ext"     --> "file.ext"
"path\to\file.ext"   --> "file.ext"
"path/to/file.ext.txt" --> "file.ext.txt"
"path/to/file"         --> ""

回答by SmokeyPHP

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

您可以在最后一个\or之后抓取任何内容/，例如：

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

(Remember files don't always need extensions)

（记住文件并不总是需要扩展名）

Though if you really want to force extension matching:

虽然如果你真的想强制扩展匹配：

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

回答by Zathrus Writer

Credits go to RegeBuddy's library for this snippet:

此代码段的积分转到RegeBuddy的库：

if (/[^\\/:*?"<>|\r\n]+$/im.test(js)) {
    // Successful match
} else {
    // Match attempt failed
}