Question

我无法解决我的错误。我想要一个向多人发送电子邮件的程序。到目前为止，这是我的代码...

public static void sendEmailWithAttachments(String host, String port,
            final String userName, final String password, String[] toAddress,
            String subject, String message, String[] attachFiles)
            throws AddressException, MessagingException {
        // sets SMTP server properties
        Properties properties = new Properties();
        properties.put("mail.smtp.host", host);
        properties.put("mail.smtp.port", port);
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.user", userName);
        properties.put("mail.password", password);

        // creates a new session with an authenticator
        Authenticator auth = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        };
        Session session = Session.getInstance(properties, auth);

        // creates a new e-mail message
        Message msg = new MimeMessage(session);

        msg.setFrom(new InternetAddress(userName));
        InternetAddress[] toAddresses = { new InternetAddress(toAddress) };
        msg.setRecipients(Message.RecipientType.TO, toAddresses);
        msg.setSubject(subject);
        msg.setSentDate(new Date());

toAddress中的{new Internet Address(toAddress)}是表示无法将String []转换为String的部分。

InternetAddress[] toAddresses = { new InternetAddress(toAddress) };

提前感谢您的帮助：）

Answer 1

只需遍历toAddress，将每个字符串包装到InternetAddress中，然后将其放入toAddresses

InternetAddress[] toAddresses = new InternetAddress[toAddress.length];

for(int i = 0; i < toAddresses; i++) {
   toAddresses[i] = new InternetAddress(toAddress[i]);
}

Answer 2

尝试首先创建Internet地址数组，然后分配一个值：

InternetAddress[] toAddresses = new InternetAddress[1];
toAddresses[0] = new InternetAddress(toAddress);
msg.setRecipients(Message.RecipientType.TO, toAddresses);

Answer 3

InternetAddress的构造函数将String作为参数而不是String数组。因此，您应该在下面进行尝试：

  InternetAddress[] toAddresses = { new InternetAddress(toAddress[0]) };

Answer 4

错误消息几乎说明了一切。您尝试将toAddress（一个String的数组）传递给InternetAddress的构造函数，并且InternetAddress的唯一一个参数构造函数接受String，不是String[]。

您知道您需要将String的数组转换为InternetAddress的数组，并且显然您希望new InternetAddress可以以某种方式做到这一点。但是，可悲的是，事情并非如此。您必须一次循环转换一次String，例如：

InternetAddress[] toAddresses = new InternetAddress[toAddress.length];
for (int i = 0; i < toAddress.length; ++i)
{
    toAddresses[i] = new InternetAddress(toAddress[i]);
}

Stirng []无法转换为字符串

4 个答案: