Question

使用空闲管理器会出现此异常：线程“main”中的异常javax.mail.MessagingException：文件夹未使用SocketChannels

我该如何解决这个问题？

ExecutorService es = Executors.newCachedThreadPool();
final IdleManager idleManager = new IdleManager(session, es);


folder.open(Folder.READ_WRITE);
            folder.addMessageCountListener(new MessageCountAdapter() {
                public void messagesAdded(MessageCountEvent ev) {
             Folder folder = (Folder)ev.getSource();
             Message[] msgs = ev.getMessages();
             System.out.println("Folder: " + folder +
                 " got " + msgs.length + " new messages");
                    try {
                        // process new messages
                        System.out.println("***********************process new messages : ");

                        idleManager.watch(folder); // keep watching for new messages
                    } catch (IOException | MessagingException ex) {
                        Logger.getLogger(mail2.class.getName()).log(Level.SEVERE, null, ex);
                    }
                }
            });

            idleManager.watch(folder);

Answer 1

正如IdleManager javadocs所说：

..在Session
中设置mail.imap.usesocketchannels属性

Answer 2

 public void watch_mail(Folder folder) throws IOException, MessagingException, InterruptedException {
    Thread t = new Thread(new Runnable() {
        public void run() {
            while (!Thread.currentThread().isInterrupted()) {
                try {
                    System.out.println("hi, interrupted = " + Thread.currentThread().isInterrupted());
                    folder.getMessageCount();
                    idleManager.watch(folder);
                    Thread.currentThread().sleep(30000);
                } catch (MessagingException | InterruptedException | IOException ex) {
                    Logger.getLogger(listening_test.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    });
    folder.addMessageCountListener(new MessageCountAdapter() {
        public void messagesAdded(MessageCountEvent ev) {
            Folder folder = (Folder) ev.getSource();
            Message[] msgs = ev.getMessages();
            System.out.println("Folder: " + folder
                    + " got " + msgs.length + " new messages");
            for (int i = 0; i < msgs.length; i++) {
                try {
                    // Get dates date 1 (day_month_year) and date 2(hours:min:second)
                    String dates[] = getDates(msgs[i]);
                    System.out.println("*************date 1: " + dates[0]);
                    System.out.println("*************date 2: " + dates[1]);
                    idleManager.watch(folder);

                } catch (ParseException | MessagingException | IOException ex) {
                    Logger.getLogger(listening_test.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    });
    t.start();
}

hi, interrupted = false
DEBUG IMAP: IdleManager watching INBOX
A4 IDLE
+ idling
DEBUG IMAP: IdleManager selected 0 channels
DEBUG IMAP: IdleManager adding INBOX to selector
DEBUG IMAP: IdleManager waiting...
hi, interrupted = false
DEBUG IMAP: IdleManager selected 0 channels

线程“main”中的异常javax.mail.MessagingException：文件夹未使用SocketChannels

2 个答案: