jakarta-mail - javax.mail.MessagingException : Connection reset while trying to access gmail using java mail API

Question

我试图使用 java 邮件 API 阅读我的 gmail 帐户中的邮件。这是代码:

import java.util.*;
import java.io.*;
import java.awt.*;
import javax.mail.*;
import javax.mail.search.FlagTerm; 
import javax.mail.Flags.Flag;
public class MailPharser {
/**
 * @param args
 */
public void mailRead()
{
    Folder inbox; 
    // TODO Auto-generated method stub
     Properties props = System.getProperties();
     props.setProperty("mail.store.protocol", "imaps"); 
     try
     {
         Session session = Session.getDefaultInstance(props, null); 

         Store store = session.getStore("imaps");

         store.connect("imap.gmail.com","<mailid@gmail.com>", "<password>"); 
         inbox = store.getFolder("Inbox"); 
         System.out.println("No of Unread Messages : " + inbox.getUnreadMessageCount());


     }
     catch (Exception ex) 
     { System.out.println("Error caught"); ex.printStackTrace(); }

}

public static void main(String[] args) {
    MailPharser mp = new MailPharser();
    mp.mailRead();
}   

}

运行时出现以下错误:

javax.mail.MessagingException: Connection reset;
  nested exception is:
java.net.SocketException: Connection reset
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:670)
at javax.mail.Service.connect(Service.java:295)
at javax.mail.Service.connect(Service.java:176)
at MailPharser.mailRead(MailPharser.java:26)
at MailPharser.main(MailPharser.java:40)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:548)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:352)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:233)
at com.sun.mail.iap.Protocol.<init>(Protocol.java:113)
at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:111)
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:637)
... 4 more

我添加了跟踪，发现连接调用失败了。我做错了什么吗？任何帮助都可以。提前致谢...

Answer 1

这可能是与 JavaMail 无关的网络问题，例如，您和 Gmail 之间的代理或防火墙。

如果你想知道是你的代码坏了还是网络坏了，你可以test using the code that comes with JavaMail .如果 JavaMail 代码有效，那么您就知道您的代码有问题，您可以使用常见问题解答中的 JavaMail 代码来改进您的代码。

如果发现是网络问题，JavaMail FAQ 也有tips for debugging it further .