我需要解析多个页面以获取它们的所有Youtube ID。
我在网上找到了许多正则表达式,但是Java正则表达式不完整(它们要么给我除ID之外的垃圾,要么会错过一些ID)。
我发现一个看起来很完整的正则表达式托管在这里。但它是用JavaScript和PHP编写的。不幸的是,我无法将它们翻译成JAVA。
有人能帮我将这个PHP正则表达式或以下JavaScript正则表达式改写成Java吗?
'~
https?:// # Required scheme. Either http or https.
(?:[0-9A-Z-]+\.)? # Optional subdomain.
(?: # Group host alternatives.
youtu\.be/ # Either youtu.be,
| youtube\.com # or youtube.com followed by
\S* # Allow anything up to VIDEO_ID,
[^\w\-\s] # but char before ID is non-ID char.
) # End host alternatives.
([\w\-]{11}) # $1: VIDEO_ID is exactly 11 chars.
(?=[^\w\-]|$) # Assert next char is non-ID or EOS.
(?! # Assert URL is not pre-linked.
[?=&+%\w]* # Allow URL (query) remainder.
(?: # Group pre-linked alternatives.
[\'"][^<>]*> # Either inside a start tag,
| </a> # or inside <a> element text contents.
) # End recognized pre-linked alts.
) # End negative lookahead assertion.
[?=&+%\w]* # Consume any URL (query) remainder.
~ix'
/https?:\/\/(?:[0-9A-Z-]+\.)?(?:youtu\.be\/|youtube\.com\S*[^\w\-\s])([\w\-]{11})(?=[^\w\-]|$)(?![?=&+%\w]*(?:['"][^<>]*>|<\/a>))[?=&+%\w]*/ig;
...[0-9A-Za-z-]...
。 - eykanali
标志。 - Marcus