我正在使用gmail Api来阅读来自JavaMail帐户的邮件。但问题是我只能读一次。有没有办法一遍又一遍地读邮件?
我的Java代码是:
import java.util.Properties;
import javax.mail.BodyPart;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
public class Main {
// main function. Project run starts from main function...
public static void main(String[] args) {
String host = "pop.gmail.com";// change accordingly
String mailStoreType = "pop3";
String username = "your_email@gmail.com";// change accordingly
String password = "your_password";// change accordingly
check(host, mailStoreType, username, password);
}
// function to make connection and get mails from server known as "Pop" server
public static void check(String host, String storeType, String user, String password)
{
try {
//create properties field
Properties properties = new Properties();
properties.put("mail.pop3.host", host);
properties.put("mail.pop3.port", "995");
properties.put("mail.pop3.starttls.enable", "true");
Session emailSession = Session.getDefaultInstance(properties);
//create the POP3 store object and connect with the pop server
Store store = emailSession.getStore("pop3s");
store.connect(host, user, password);
//create the folder object and open it
Folder emailFolder = store.getFolder("Inbox");
emailFolder.open(Folder.READ_ONLY);
// retrieve the messages from the folder in an array and print it
Message[] messages = emailFolder.getMessages();
System.out.println("messages.length---" + messages.length);
for (int i = 0, n = messages.length; i < n; i++) {
Message message = messages[i];
Object obj = message.getContent();
Multipart mp = (Multipart)obj;
BodyPart bp = mp.getBodyPart(0);
System.out.println("---------------------------------");
System.out.println("Email Number " + (i + 1));
System.out.println("Subject: " + message.getSubject());
System.out.println("From: " + message.getFrom()[0]);
System.out.println("To: " + message.getAllRecipients().toString());
System.out.println("Received Date:" + message.getReceivedDate());
System.out.println("Text: " + bp.getContent().toString());
}
//close the store and folder objects
emailFolder.close(false);
store.close();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
在这段代码中,我使用pop服务器读取电子邮件,现在我在其中输入电子邮件和密码并运行。它工作得很好,但它只读一次电子邮件,下次如果我运行程序,工具包给我的消息数量等于0……我想一遍又一遍地读我想读的信息...任何帮助都将不胜感激。
发布于 2015-11-04 15:15:41
如果你想每次都收到所有的邮件,IMAP服务器将是最好的选择。
您可以将邮件服务器更改为
IMAP.gmail.com
端口将为993 (考虑到您使用的是gmail帐户)。
提供的Link sidgate将是最好的例子。
发布于 2018-10-24 07:41:04
Gmail对如何处理pop3邮件请求进行了用户设置。我遇到了同样的问题,并最终查看了这个页面:https://javaee.github.io/javamail/FAQ#gmailsettings。
要每次查看所有电子邮件,您需要启用标志(在设置页面中):对所有邮件(即使是已经下载的邮件)启用POP
帮了我大忙。希望这能有所帮助。
https://stackoverflow.com/questions/33514856
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