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我Asp.Net/C#在我的项目中使用。在我Regular Expression Validator用来验证电子邮件地址的一个表单中。我搜索了一些验证电子邮件的示例。我发现了这个\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 可以任何人解释我这个模式，这将非常有帮助。任何解释都非常感谢。

谢谢。

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一些简短的提示：

  • \w 代表单词字符

  • [-+.'] 表示大括号中的字符之一

  • plus 和 * 是量词

  • ( ) 包围一个可以创建反向引用的组（您可以以编程方式引用或读取的内容）

更长的（自动）解释：

\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

Match a single character that is a “word character” (letters, digits, and underscores)     «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 1 «([-+.']\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last  iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-+.'” «[-+.']»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “@” literally «@»
Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 2 «([-.]\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-.” «[-.]»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “.” literally «\.»
Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 3 «([-.]\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-.” «[-.]»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»

我使用 RegexBuddy 创建了更长的自动解释

编辑：

要获得有关正则表达式的一些入门信息，您可以查看http://www.regular-expressions.info/

于 2012-05-02T06:14:18.953 回答