正则表达式有效的电子邮件地址
准确重复：使用正则表达式来验证电子邮件地址
什么是有效的电子邮件地址字符和模式，以及如何编写与之匹配的正则表达式？
干得好：
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)+|Z|(?=[["()<>@,;:".[]]))|"(?:[^"r]|.|(?:(?:rn)?[ t]))*"(?:(?:
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?:rn)?[ t])+|Z|(?=[["()<>@,;:".[]]))|"(?:[^"r]|.|(?:(?:rn)?[
t]))*"(?:(?:rn)?[ t])*))*@(?:(?:rn)?[ t])*(?:[^()<>@,;:".[] 00-
31]+(?:(?:(?:rn)?[ t])+|Z|(?=[["()<>@,;:".[]]))|[([^[]r]|.)*
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rn)?[ t])+|Z|(?=[["()<>@,;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[
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()<>@,;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*)(?:.(?:(?:rn)
?[ t])*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])+|Z|(?=[["()<>
@,;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*))*(?:,@(?:(?:rn)?[
t])*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])+|Z|(?=[["()<>@,
;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*)(?:.(?:(?:rn)?[ t]
)*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])+|Z|(?=[["()<>@,;:
".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*))*)*:(?:(?:rn)?[ t])*)?
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[]]))|"(?:[^"r]|.|(?:(?:rn)?[ t]))*"(?:(?:rn)?[ t])*)(?:.(?:(?:
rn)?[ t])*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])+|Z|(?=[[
"()<>@,;:".[]]))|"(?:[^"r]|.|(?:(?:rn)?[ t]))*"(?:(?:rn)?[ t])
*))*@(?:(?:rn)?[ t])*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])
+|Z|(?=[["()<>@,;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*)(?:
.(?:(?:rn)?[ t])*(?:[^()<>@,;:".[] 00- 31]+(?:(?:(?:rn)?[ t])+|Z
|(?=[["()<>@,;:".[]]))|[([^[]r]|.)*](?:(?:rn)?[ t])*))*>(?:(
?:rn)?[ t])*))*)?;s*)
不，我不是在开玩笑。 http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html
这是一个开始的好地方：
http://www.regular-expressions.info/email.html
作为一个便笺，这个网站可能是开始正则表达式帮助和教程的最佳位置。
简短的回答是：它很复杂。
我在电子邮件验证中遇到过的最完整和准确的正则表达式就是这里记录的一个。 这不是因为心灵的模糊; 它足够复杂，它被分解成多个部分，以便人们更容易解析（示例代码是用Java编写的）。 但是，如果一切顺利进行验证是值得的，我认为它不会好得多。
请记住，该规范提到了许多可能不被认为通常用于电子邮件地址的情况。 你可能想知道它们，并决定这些情况对你是否重要。
无论如何，我建议你使用单元测试来确认你的表达涵盖了你认为重要的情况。 这样，当你对它进行干涉时，你可以确定你没有破坏一些以前工作过的情况。
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