Question

我正在开发一个应用程序，我想要获取所有邮件，无论是阅读还是未阅读。任何人都可以帮助我如何实现此功能？我在这里使用的是IMAP，但我在这个片段中遇到了问题。

    @Override
    protected Void doInBackground(Void... voids) {

        Properties props = new Properties();
        //IMAPS protocol
        props.setProperty("mail.store.protocol", "IMAP");
        //Set host address
        props.setProperty("mail.host", "IMAP.gmail.com");
        //Set specified port
        props.setProperty("mail.IMAP.port", "993");
        props.setProperty("mail.transport.protocol", "IMAP");
        props.setProperty("mail.imap.ssl.trust", "*");
        session = Session.getInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication("abc@gmail.com", "abcd");
                    }
                });
        try {
            Store store = session.getStore("IMAP");

            store.connect();
            inbox = store.getFolder("INBOX");
            inbox.open(Folder.READ_ONLY);
            Message messages[] = inbox.search(new FlagTerm(
                    new Flags(Flags.Flag.SEEN), false));

            for (int i = 0; i < messages.length; i++) {

                Message message = messages[i]; Address[] from = message.getFrom(); System.out.println("-------------------------------");
                System.out.println("Date : " + message.getSentDate());
                System.out.println("From : " + from[0]);
                System.out.println("Subject: " + message.getSubject());
                System.out.println("Content :");
                processMessageBody(message);
                System.out.println("--------------------------------");
            }

            inbox.close(true);
            store.close();

        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }
}
public void processMessageBody(Message message) {
    try { Object content = message.getContent();
        // check for string
        // then check for multipart
        if (content instanceof String) {
            System.out.println(content);
        } else if (content instanceof Multipart)
        { Multipart multiPart = (Multipart) content;
        procesMultiPart(multiPart);
        } else if (content instanceof InputStream) {
            InputStream inStream = (InputStream) content;
            int ch; while ((ch = inStream.read()) != -1) {
                System.out.write(ch);
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (MessagingException e) {
        e.printStackTrace();
    }
} public void procesMultiPart(Multipart content) {
    try {
        int multiPartCount = content.getCount();
        for (int i = 0; i < multiPartCount; i++) {
            BodyPart bodyPart = content.getBodyPart(i);
            Object o; o = bodyPart.getContent();
            if (o instanceof String) {
                System.out.println(o);
            } else if (o instanceof Multipart) {
                procesMultiPart((Multipart) o);
            }
        }
    } catch (IOException e)
    { e.printStackTrace();
    } catch (MessagingException e)
    { e.printStackTrace(); }
}`

这个代码段没有按照所需的输出工作，请让我知道我在哪里做错了它在调用message.getContent时给出异常方法抛出'java.lang.NoClassDefFoundError'异常。

使用带有POP3或IMAPS协议的javamail检索所有未读电子邮件

0 个答案: