Java电子邮件地址验证 [英] Java Email Address Validation

问题描述

如何编写一个接受从键盘输入的电子邮件地址的程序，然后循环查找@符号，查看打​​印之前是否只有一个@字符，有效，如果电子邮件地址有一个@ sign和invalid，如果电子邮件地址有多个@？

How would I write a program that takes an email address typed in from the keyboard then loops through it looking for an @ sign to see if it has exactly one @ character before printing, "valid," if the email address has one @ sign and "invalid," if the email address has more than one @?

推荐答案

使用官方的java电子邮件包是最简单：

Using the official java email package is the easiest:

public static boolean isValidEmailAddress(String email) {
   boolean result = true;
   try {
      InternetAddress emailAddr = new InternetAddress(email);
      emailAddr.validate();
   } catch (AddressException ex) {
      result = false;
   }
   return result;
}

（EDIT）或简化：

public static boolean isValidEmailAddress(String email) {
   try {
      new InternetAddress(email).validate();
   } catch (AddressException ex) {
      return false;
   }
   return true;
}

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