java 在 JavaMail 中使用 message.getFrom() 时只显示要显示的电子邮件地址
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Getting only email address to display when using message.getFrom() in JavaMail
提问by Rhys12341111
Currently when using JavaMail if I use getFrom()to decompose a message into its separate parts the getFrom()will also display the name of the sender. This may be a simple question but how do you make it so only the email address is returned. Sorry if this is a simple question but I cannot seem to find an answer.
目前，在使用 JavaMail 时，如果我getFrom()用来将消息分解为单独的部分，getFrom()则还将显示发件人的姓名。这可能是一个简单的问题，但您如何才能只返回电子邮件地址。对不起，如果这是一个简单的问题，但我似乎找不到答案。
回答by dkarp
As it turns out, the address has already been parsed for you. Because of JavaMail's silly extra layer of abstraction, it's returning InternetAddressobjects as their Addresssuperclass. Addressobjects are pretty much useless. You need to cast them back down to InternetAddressand then just get the email part:
事实证明，该地址已经为您解析过了。由于 JavaMail 愚蠢的额外抽象层，它返回InternetAddress对象作为它们的Address超类。 Address对象几乎没用。您需要将它们转换回InternetAddress，然后获取电子邮件部分：
Address[] froms = message.getFrom();
String email = froms == null ? null : ((InternetAddress) froms[0]).getAddress();
