正则表达式很常用，下面是我整理的匹配URL或者网址的一些表达式：
正则表达式
(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?
匹配
/Default.aspx | /electronics/0-6342366-8-8994967-1.html
不匹配
则表达式
^\\{2}[\w-]+\\(([\w-][\w-\s]*[\w-]+[$$]?$)|([\w-][$$]?$))
匹配
\\server\service | \\server\my service | \\serv_001\service$
不匹配
\\my server\service | \\server\ service | \\server$\service
正则表达式
^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)?((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.[a-zA-Z]{2,4})(\:[0-9]+)?(/[^/][a-zA-Z0-9\.\,\?\'\\/\+&%\$#\=~_\-@]*)*$
匹配
| https://64.81.85.161/site/file.php?cow=moo's |ftp://user:pass@:123
不匹配
正则表达式
^([a-zA-Z]\:|\\\\[^\/\\:*?"<>|]+\\[^\/\\:*?"<>|]+)(\\[^\/\\:*?"<>|]+)+(\.[^\/\\:*?"<>|]+)$
匹配
c:\Test.txt | \\server\shared\Test.txt | \\server\shared\Test.t
不匹配
c:\Test | \\server\shared | \\server\shared\Test.?
正则表达式
^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$
匹配
/dir/file.php?var=moo | https://localhost |ftp://user:pass@:21/file/dir
不匹配
| /dir//
正则表达式
^([a-zA-Z]\:)(\\[^\\/:*?<>"|]*(?<![ ]))*(\.[a-zA-Z]{2,6})$
匹配
C:\di___r\fi_sysle.txt | c:\dir\filename.txt
不匹配
c:\dir\file?name.txt
正则表达式
^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}$
匹配
| this.is.a.museum |
不匹配
notadomain-.com | helloworld.c | .
正则表达式
^(((ht|f)tp(s?))\://)?(www.|[a-zA-Z].)[a-zA-Z0-9\-\.]+\.(com|edu|gov|mil|net|org|biz|info|name|museum|us|ca|uk)(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$
匹配
:8103 | /blah.asp?sort=ASC |/blah.htm#blah
不匹配
www.state.ga | http://www.blah.ru
正则表达式
\b(([\w-]+://?|www[.])[^\s()<>]+(?:[\w\d]+[\w\d]+|([^[:punct:]\s]|/)))
匹配
/blah_blah | /blah_blah/ | (Something like /blah_blah) | /blah_blah_(wikipedia) | (Something like /blah_blah_(wikipedia)) | /blah_blah. |/blah_blah/. | </blah_blah> | </blah_blah/>| /blah_blah, | /wpstyle/?p=364. | http://?df.ws/123 | rdar://1234 | rdar:/1234 | http://userid:password@:8080 |http://userid@ | http://userid@:8080 |http://userid:password@
不匹配
| | /relative_resource.php
