我正在嘗試通讀郵箱中的郵件，但是在將郵件內容解析為 MimeMessage 的過程中，某些特定郵件使進程掛起，它沒有顯示任何錯誤消息，日志顯示程序在 MimeMessage.writeTo 步驟停止(OutputStream), 下面是實際代碼for (int n = message.length; i < n; i++) {Log25.write("IMAPaccess", "getMessages", "start convert"); MimeMessage msg = (MimeMessage)message[i]; Log25.write("IMAPaccess", "getMessages", "A"); ByteArrayOutputStream bos = new ByteArrayOutputStream(); Log25.write("IMAPaccess", "getMessages", "B"); msg.writeTo(bos); Log25.write("IMAPaccess", "getMessages", "C"); bos.close(); Log25.write("IMAPaccess", "getMessages", "start create bis"); SharedByteArrayInputStream bis = new SharedByteArrayInputStream(bos.toByteArray()); MimeMessage cmsg = new MimeMessage(session, bis); bis.close();....下面是日志信息，它沒有顯示任何異常，但掛在“B”處，即“msg.writeTo(bos);”步驟中 在日志中Mon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages 36: [Ljavax.mail.internet.InternetAddress;@d522e24d nullMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages 36: From address length 1Mon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages 36: From address INFORMATION <[email protected]>Mon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages complete for loop jMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages start convertMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages AMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages BMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages CMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages start create bisMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages start cmsg to mimeMessageMon Sep 10 09:44:41 UTC 2018 IMAPaccess getMessages content type: text/html;^M
1 回答
暮色呼如
TA貢獻1853條經驗 獲得超9個贊
最終我放棄了轉換消息類型，如果它在轉換中掛起我直接讓for循環跳過并繼續，這樣一些消息就被省略了。我認為這無關緊要，因為我發現只有垃圾郵件才能使程序掛起。下面是代碼
for (int n = message.length; i < n; i++)
{
Log25.write("IMAPaccess", "getMessages", "start convert");
MimeMessage msg = (MimeMessage)message[i];
ByteArrayOutputStream bos = new ByteArrayOutputStream();
// MJN1 has some SPAM email cannot be converted, so use thread to do the conversion
final Runnable stuffToDo = new Thread() {
@Override
public void run() {
try {
Log25.write("IMAPaccess", "run", "write to MimeMessage");
msg.writeTo(bos);
Log25.write("IMAPaccess", "run", "wrote to MimeMessage");
} catch (IOException | MessagingException e) {
Log25.write("IMAPaccess", "run", (new StringBuilder()).append("error = ").append(e.getMessage()).toString());
}
}
};
final ExecutorService executor = Executors.newSingleThreadExecutor();
final Future future = executor.submit(stuffToDo);
executor.shutdown(); // This does not cancel the already-scheduled task.
// start the conversion and if the process hangs, the loop should skip and continue
try {
future.get(1, TimeUnit.SECONDS);
}
catch (InterruptedException ie) {
Log25.write("IMAPaccess", "getMessages", (new StringBuilder()).append("error = ").append(ie.getMessage()).toString());
continue;
}
catch (ExecutionException ee) {
Log25.write("IMAPaccess", "getMessages", (new StringBuilder()).append("error = ").append(ee.getMessage()).toString());
continue;
}
catch (TimeoutException te) {
Log25.write("IMAPaccess", "getMessages", (new StringBuilder()).append("error = ").append(te.getMessage()).toString());
continue;
}
catch(Exception e) {
Log25.write("IMAPaccess", "getMessages", (new StringBuilder()).append("error = ").append(e.getMessage()).toString());
continue;
}
if (!executor.isTerminated())
executor.shutdownNow();
bos.close();
我使用線程和執行程序來使掛起循環繼續，這不是一件容易的事。
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