强悍的电子邮件地址(email address)正则表达式

强悍的电子邮件地址(email address)正则表达式

强悍的电子邮件地址(email address)正则表达式

原始来源:

修改后加入了两个新功能:

1,匹配类似"lc <deerchao@>" 这样的包含姓名的格式.

2,添加了四个命名组: name, email, user, domain. 这样可以方便取出相应的信息.Regex re = new

Regex(@"^((?'name'.+?)\s*<)?(?'email'(?>[a-zA-Z\d!# $%&'*+\-/=?^_`{|}~]+\x20*|""(?'user'(?=[\x01-\x7f])[^""\\ ]|\\[\x01-\x7f])*""\x20*)*(?'angle'<))?(?'user'(?!\.)(?>\.?[ a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|""((?=[\x01-\x7f])[^"" \\]|\\[\x01-\x7f])*"")@(?'domain'((?!-)[a-zA-Z\d\-]+(?<!-)\.)+ [a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}| [a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+) \])(?'angle')(?(name)>)$", RegexOptions.Multiline | RegexOptions.ExplicitCapture);

MatchCollection mc = re.Matches(@"l c

<abc@>

Abc@

aBC@

abc.123@

");

foreach (Match ma in mc)

{

}原表达式的最大优点就是匹配能力强大,能吃下各种符合规范(RFC2882)的表达式.

匹配WikiPedia上的10/11个合法邮件地址格式,不合法的一个也不匹配:Valid e-mail addresses

abc@

Abc@

aBC@

abc.123@

1234567890@

_______@

abc+mailbox/department=shipping@

!#$%&'*+-/=?^_`.{|}~@ (all of these characters are allowed)

"abc@def"@ (anything goes inside quotation marks)

"Fred Bloggs"@

"%()[]\;:,<>"@

Invalid e-mail addresses

(character @ is missing)

Abc.@ (character dot(.) is last in local part) Abc..123@ (character dot(.) is double)

A@b@c@ (only one @ is allowed outside quotations marks)

%()[]\;:,<>@ (none of the characters before the @ is allowed outside quotation marks)posted on 2008-06-14 15:24 deerchao 阅读(1718) 评论(1) 编辑收藏