正则表达式提取字符串

Question

I got the following string:

"url("http://localhost/image/user/temp/n9cec42c939ab461cac7852c267413b1b.jpg")"

How can I extract the file name using a javascript regular expression?

I tried [^/]+$ but it keeps the ") at the end.

Thank you.

Answer 1

split on backslash, pop to get the last result, and remove the ")

'url("http://localhost/image/user/temp/n9cec42c939ab461cac7852c267413b1b.jpg")'.split('/').pop().replace('\")', '')

Example

Or if RegExp is just your thing:

var url = 'url("http://localhost/image/user/temp/n9cec42c939ab461cac7852c267413b1b.jpg")'; 
url.match(/.+\/(.+)\"\)/)[1]; // file name

Answer 2

[^/]+"\)$

would work on your example. If that's not what you're after, please provide more details in your question.

Answer 3

With a regexp you can use:

'url("http://localhost/image/user/temp/n9cec42c939ab461cac7852c267413b1b.jpg")'.match(/\/([\d\w]+\.[\w]+)/)[1]

assuming your filename consists from az + 0-9 and a three character extension

Answer 4

Quite close to what you wrote is

/[^\/]+(?=\"\)$)/

for example

/[^\/]+(?=\"\)$)/.exec(s)

where s is your example string returns the correct filename.

(explanation: With regular expressions the form (?=...) means something that must be following the match but that should not be considered part of the match).