2

注意：我当前的解决方案正在运行（我认为）。我只是想确保我没有遗漏任何东西。

我的问题：我想知道如何检查是否由于电子邮件地址无效而导致异常。使用 Java 邮件。

目前我正在检查SMTPAddressFailedException与getAddress()和AddressException与getRef()。

这是我目前进行检查的方法。我错过了什么吗？

/**
* Checks to find an invalid address error in the given exception. Any found will be added to the ErrorController's
* list of invalid addresses. If an exception is found which does not contain an invalid address, returns false.
*
* @param exception the MessagingException which could possibly hold the invalid address
* @return if the exception is not an invalid address exception.
*/
public boolean handleEmailException(Throwable exception) {
  String invalidAddress;
  do {
    if (exception instanceof SMTPAddressFailedException) {
      SMTPAddressFailedException smtpAddressFailedException = (SMTPAddressFailedException) exception;
      InternetAddress internetAddress = smtpAddressFailedException.getAddress();
      invalidAddress = internetAddress.getAddress();
    } else if (exception instanceof AddressException) {
      AddressException addressException = (AddressException) exception;
      invalidAddress = addressException.getRef();
    }
    //Here is where I might do a few more else ifs if there are any other applicable exceptions.
    else {
      return false;
    }
    if (invalidAddress != null) {
      //Here's where I do something with the invalid address.
    }
    exception = exception.getCause();
  } while (exception != null);
  return true;
}

注意：如果您好奇（或者它有帮助），我会使用Java Helper Library来发送电子邮件（请参阅此行），因此最初会引发错误。

4

1 回答 1

2

您通常不需要强制转换异常；这就是为什么你可以有多个 catch 块：

try {
    // code that might throw AddressException
} catch (SMTPAddressFailedException ex) {
    // Catch subclass of AddressException  first
    //  ...
} catch (AddressException ex) {
    // ...
}

如果你担心嵌套异常，可以使用 Guava 的Throwables.getRootCause.

于 2012-08-08T14:46:39.993 回答