[英]JavaMail : Folder.hasNewMessages() and .getMessageCount() don't seem to work properly
我有這個簡單的代碼來perdiodically訪問pop3服務器並檢查收件箱文件夾中是否有新消息
public static void main(String[] args) {
try {
String storeType = "pop3";
String host = "...";
int port = ...;
String user = "...";
String psw = "...";
//
int delay = 1;
long mins = 200 * 60 * delay;
firstAccess = true;
Properties properties = new Properties();
properties.put("mail.pop3.host", host);
properties.put("mail.pop3.user", user);
properties.put("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
properties.put("mail.pop3.port", port);
RomasAuthenticator r = new RomasAuthenticator(user, psw);
Session session = Session.getDefaultInstance(properties, r);
POP3Store emailStore = (POP3Store) session.getStore(storeType);
emailStore.connect(host, port, user, psw);
Folder emailFolder = emailStore.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
while (true) {
if (checkInbox(emailFolder)) {
//prepara la notifica per il voice_service
System.out.println("mes!");
}
firstAccess = false;
Thread.sleep(mins);
}
} catch (Exception ex) {
//return null;
}
}
private static boolean checkInbox(Folder inbox_folder) throws MessagingException, IOException {
System.out.println("checking");
boolean res = false;
try {
int email_actual_count = inbox_folder.getMessageCount();
if (email_actual_count > email_prev_count /*or hasNewMessages()*/) {
if (!firstAccess) {
res = true;
}
}
//bisogna aggiornare comunque email_count in caso siano stati cancellati messaggi
email_prev_count = email_actual_count;
}
catch (Exception e) {
e.printStackTrace();
}
return res;
}
getMessageCount()和hasNewMessages()都不起作用,因為第一個總是返回相同數量的消息,第二個總是返回false。 我做錯了什么? 我不想使用messagelistener,因為這段代碼將在性能非常低的機器人上運行。感謝大家
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