blocks|key|1029189|text|我对此的看法(参见上面的评论和链接)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1029190|%5E.%2B@.%2B$|code-block|syntax|javascript|1029191|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

My shot at this (see comment and link above):

<pre><code>^.+@.+$
</code></pre>

blocks|key|1029149|text|validates_format_of+:email,+
++:with+=>+/%5E(%7C(([A-Za-z0-9]%2B_%2B)%7C([A-Za-z0-9]%2B\-%2B)%7C([A-Za-z0-9]%2B\.%2B)%7C([A-Za-z0-9]%2B\%2B%2B))*[A-Za-z0-9]%2B@((\w%2B\-%2B)%7C(\w%2B\.))*\w{1,63}\.[a-zA-Z]{2,6})$/i|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1029150|别让我解释它！这是来自一个验证插件，我后来忘记了，因为我需要的只是电子邮件正则表达式。|unstyled|1029151|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>validates_format_of :email, 
 :with =&gt; /^(|(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6})$/i
</code></pre>

Don't ask me to explain it! That was from a validation plugin that I've since lost track of as all I needed was the email regex.

blocks|key|814632|text|没有足够的声誉来添加评论，但如果您要使用Devise+regexp，并且您已经在使用Devise本身，那么您可以简单地使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|814633|validates+:email,+presence:+true,+format:+Devise.email_regexp|offset|length|style|CODE|814634|entityMap^0|0|0|1P|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Not enough reputation to add a comment but if you are going to use the Devise regexp, and you are already using Devise itself, then you can simply use:

<code>validates :email, presence: true, format: Devise.email_regexp</code>

blocks|key|814358|text|/\b[A-Z0-9._%25a-z\-]%2B@(?:[A-Z0-9a-z\-]%2B\.)%2B[A-Za-z]{2,4}\z/|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|814359|这是我用来验证电子邮件的。|unstyled|814360|来源：http://www.regular-expressions.info/email.html|offset|length|814361|entityMap|0|LINK|mutability|MUTABLE|url|http://www.regular-expressions.info/email.html^0|0|0|3|1A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|F|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<pre><code>/\b[A-Z0-9._%a-z\-]+@(?:[A-Z0-9a-z\-]+\.)+[A-Za-z]{2,4}\z/
</code></pre>

This is what I use to validate email.

Source: <a href="http://www.regular-expressions.info/email.html" rel="noreferrer">http://www.regular-expressions.info/email.html</a>

blocks|key|814315|text|这是一个我已经使用了一段时间的电子邮件正则表达式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|814316|\b[A-Z0-9._%25%2B-]%2B@[A-Z0-9.-]%2B\.[A-Z]{2,4}\b|code-block|syntax|javascript|814317|这是来自here的|offset|length|814318|entityMap|0|LINK|mutability|MUTABLE|url|http://www.regular-expressions.info/email.html^0|0|0|4|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Here's an email regex that I've been using for a while:

<pre><code>\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b
</code></pre>

It's from <a href="http://www.regular-expressions.info/email.html" rel="nofollow">here</a>

blocks|key|1029358|text|%5E.%2B@[\w]%2B\S[%5E\s]%2B$|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1029359|对第一个答案的简短改进|1029360|entityMap^0|0|I|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

<code>^.+@[\w]+\S[^\s]+$</code>

A short improvement to first answer

blocks|key|1029427|text|URI模块具有内置的regexp|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1029428|URI::MailTo::EMAIL_REGEXP|code-block|syntax|javascript|1029429|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

URI module has a build-in regexp
<pre class="lang-rb prettyprint-override"><code>URI::MailTo::EMAIL_REGEXP
</code></pre>

blocks|key|814473|text|对于电子邮件验证，我提出了这个正则表达式，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|814474|/%5E[\w\d]%2B@[\w\d]%2B(\.[\w\d]%2B)%2B$/|code-block|syntax|javascript|814475|不知道这会对你有多大帮助，但对我来说很好。|814476|如果任何人发现它失败的任何电子邮件地址，请回复我，所以我将能够在此工作更多。|814477|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For email validation, I come up with this regular expression,

<pre><code>/^[\w\d]+@[\w\d]+(\.[\w\d]+)+$/
</code></pre>

Don't know how much it will help you but working fine for me.

If anyone find it failing for any email address please reply me so I will be able to work more on this.

blocks|key|814566|text|在非英语区域设置中，您可能需要验证带有重音(unicode)字符的电子邮件，如čšēīū等。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|814567|此方法在以下区域设置中检查返回的nil，作为电子邮件验证失败的标志：|offset|length|style|CODE|814568|def+validate_unicode_email+email
++/\A[\w\u00C0-\u017F\-]%2B(\.[\w\u00C0-\u017F\-]%2B)?@[\w\u00C0-\u017F\-]%2B\.[\w]{2,6}$/.match+email
end|code-block|syntax|javascript|814569|这将传递像name.surname@gmail.com，āpsis@mājās.lv，test_email@test_domain.org这样的电子邮件|814570|entityMap^0|0|G|3|0|0|5|M|S|E|17|Q|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|V|8|@$D|W|E|X|F|G]|$D|Y|E|Z|F|G]|$D|10|E|11|F|G]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|P|$]]

In non-English locales you may need to verify emails with accented (unicode) characters such as čšēīū etc.

This method checks for a returned <code>nil</code> as a sign for a failed email validation in such locales:

<pre><code>def validate_unicode_email email
 /\A[\w\u00C0-\u017F\-]+(\.[\w\u00C0-\u017F\-]+)?@[\w\u00C0-\u017F\-]+\.[\w]{2,6}$/.match email
end
</code></pre>

This will pass emails like <code>name.surname@gmail.com</code>, <code>āpsis@mājās.lv</code>, <code>test_email@test_domain.org</code>

blocks|key|1029304|text|这是我们使用的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1029305|我们假设它是“某物”@“某物”。"something“，2-4个字符。它应该涵盖任何“常规”电子邮件。|1029306|/%5E([a-zA-Z0-9_\-\.]%2B)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)%7C(([a-zA-Z0-9\-]%2B\.)%2B))([a-zA-Z]{2,4}%7C[0-9]{1,3})(\]?)$/|code-block|syntax|javascript|1029307|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here's what we use.

We assume it's "something" @ "something" . "something" (2-4 characters). It should cover any "regular" email.

<pre><code>/^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/
</code></pre>

blocks|key|814481|text|validates_format_of+:email,+:with+=>+/\A[A-Za-z0-9._%25%2B-]%2B@[A-Za-z0-9.-]%2B\.[A-Za-z]%2B\z/i|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|814482|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>validates_format_of :email, :with =&gt; /\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/i
</code></pre>

I'm looking for a regex to validate an email to learn if it's valid or not.. I have the following:

<pre><code>def is_a_valid_email?(email)
 email_regex = %r{
 ^ # Start of string
 [0-9a-z] # First character
 [0-9a-z.+]+ # Middle characters
 [0-9a-z] # Last character
 @ # Separating @ character
 [0-9a-z] # Domain name begin
 [0-9a-z.-]+ # Domain name middle
 [0-9a-z] # Domain name end
 $ # End of string
 }xi # Case insensitive

 (email =~ email_regex)
end
</code></pre>

Problem with the above is <code>XXX_XXX@Xxx.com</code> does not return as valid when it should be. Any thoughts or suggestions for a better regex?

Thanks

rails - REGEX for email validation

我正在寻找一个正则表达式来验证电子邮件，以了解它是否有效。我有以下几点：def is_a_valid_email?(email)    email_regex = %r{      ^ # Start of string      [0-9a-z] # First character      [0-9a-z.+]+ # Middle characters      [0-9a-z] # Last

问rails -用于电子邮件验证的REGEX
EN

回答 11

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问rails -用于电子邮件验证的REGEXEN

回答 11

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问rails -用于电子邮件验证的REGEX
EN