如果有人需要Kotlin中的完美函数来节省他们的时间。希望这能有所帮助

fun extractYTId(ytUrl: String?): String? {
    var vId: String? = null
    val pattern = Pattern.compile(
        "^https?://.*(?:youtu.be/|v/|u/\\w/|embed/|watch?v=)([^#&?]*).*$",
        Pattern.CASE_INSENSITIVE
    )
    val matcher = pattern.matcher(ytUrl)
    if (matcher.matches()) {
        vId = matcher.group(1)
    }
    return vId
}

function youtube_parser(url){
    var match = url.match(/^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/);
    return (match&&match[7].length==11)?match[7]:false;
}

最短高效

这里有一个红宝石版本:

def youtube_id(url)
   # Handles various YouTube URLs (youtube.com, youtube-nocookie.com, youtu.be), as well as embed links and urls with various parameters
   regex = /(?:youtube(?:-nocookie)?\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|vi|e(?:mbed)?)\/|\S*?[?&]v=|\S*?[?&]vi=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/
   match = regex.match(url)
   if match && !match[1].nil?
      match[1]
   else
      nil
   end
end

测试方法:

example_urls = [
   'www.youtube-nocookie.com/embed/dQw4-9W_XcQ?rel=0',
   'http://www.youtube.com/user/Scobleizer#p/u/1/dQw4-9W_XcQ',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ&feature=channel',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ&playnext_from=TL&videos=osPknwzXEas&feature=sub',
   'http://www.youtube.com/ytscreeningroom?v=dQw4-9W_XcQ',
   'http://www.youtube.com/user/SilkRoadTheatre#p/a/u/2/dQw4-9W_XcQ',
   'http://youtu.be/dQw4-9W_XcQ',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ&feature=youtu.be',
   'http://youtu.be/dQw4-9W_XcQ',
   'http://www.youtube.com/user/Scobleizer#p/u/1/dQw4-9W_XcQ?rel=0',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ&playnext_from=TL&videos=dQw4-9W_XcQ&feature=sub',
   'http://www.youtube.com/ytscreeningroom?v=dQw4-9W_XcQ',
   'http://www.youtube.com/embed/dQw4-9W_XcQ?rel=0',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ',
   'http://youtube.com/v/dQw4-9W_XcQ?feature=youtube_gdata_player',
   'http://youtube.com/vi/dQw4-9W_XcQ?feature=youtube_gdata_player',
   'http://youtube.com/?v=dQw4-9W_XcQ&feature=youtube_gdata_player',
   'http://www.youtube.com/watch?v=dQw4-9W_XcQ&feature=youtube_gdata_player',
   'http://youtube.com/?vi=dQw4-9W_XcQ&feature=youtube_gdata_player',
   'http://youtube.com/watch?v=dQw4-9W_XcQ&feature=youtube_gdata_player',
   'http://youtube.com/watch?vi=dQw4-9W_XcQ&feature=youtube_gdata_player',
   'http://youtu.be/dQw4-9W_XcQ?feature=youtube_gdata_player'
]

# Test each one
example_urls.each do |url|
   raise 'Test failed!' unless youtube_id(url) == 'dQw4-9W_XcQ'
end

要查看此代码并在在线repl中运行测试，您也可以到这里: https://repl.it/@TomChapin/youtubeid

你可以使用下面的代码从URL中获取YouTube视频ID:

url = "https://www.youtube.com/watch?v=qeMFqkcPYcg"
VID_REGEX = /(?:youtube(?:-nocookie)?\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/
alert(url.match(VID_REGEX)[1]);

我们认识这些人物?”v="永远不会出现多于一个，但'v'可以以某种方式出现在本我本身，所以我们使用"?V ="作为分隔符。看到它在这里工作

//Get YouTube video Id From Its Url

     $('button').bind('click',function(){
var 
url='http://www.youtube.com/watch?v=u8nQa1cJyX8',
videoId = url.split('?v='),//Split data to two
YouTubeVideoId=videoId[1];
alert(YouTubeVideoId);return false;

});

<button>Click ToGet VideoId</button>

试试NPM包youtube-id

测试在不同的网址:

const tested = [
  'https://www.youtube.com/watch?v={YOUTUBE_ID}&nohtml5=False',
  'https://youtu.be/{YOUTUBE_ID}',
  'www.youtube.com/embed/{YOUTUBE_ID}'
  // ....
]