无法连接到邮件存储javax.mail.AuthenticationFailedException:[AUTH]用户名和密码不被接受

你好，我正试着 使用JavaMail下载电子邮件中的附件

本网站的参考资料：

但是，我得到以下错误：

Could not connect to the message store javax.mail.AuthenticationFailedException: [AUTH] Username and password not accepted.

代码如下：

 public class EmailAttachmentReceiver {
 private String saveDirectory;

 /**
  * Sets the directory where attached files will be stored.
  * @param dir absolute path of the directory
  */

 public void setSaveDirectory(String dir) {
    this.saveDirectory = dir;
 }

 /**
 * Downloads new messages and saves attachments to disk if any.
 * @param host
 * @param port
 * @param userName
 * @param password
 */
 public void downloadEmailAttachments(String host, String port,
        String userName, String password) {
    Properties properties = new Properties();

    // server setting
    properties.put("mail.pop3.host", host);
    properties.put("mail.pop3.port", port);

    // SSL setting
    properties.setProperty("mail.pop3.socketFactory.class",
            "javax.net.ssl.SSLSocketFactory");
    properties.setProperty("mail.pop3.socketFactory.fallback", "false");
    properties.setProperty("mail.pop3.socketFactory.port",
            String.valueOf(port));

    Session session = Session.getDefaultInstance(properties);

    try {
        // connects to the message store
        Store store = session.getStore("pop3");
        store.connect(userName, password);

        // opens the inbox folder
        Folder folderInbox = store.getFolder("INBOX");
        folderInbox.open(Folder.READ_ONLY);

        // fetches new messages from server
        Message[] arrayMessages = folderInbox.getMessages();

        for (int i = 0; i < arrayMessages.length; i++) {
            Message message = arrayMessages[i];
            Address[] fromAddress = message.getFrom();
            String from = fromAddress[0].toString();
            String subject = message.getSubject();
            String sentDate = message.getSentDate().toString();

            String contentType = message.getContentType();
            String messageContent = "";

            // store attachment file name, separated by comma
            String attachFiles = "";

            if (contentType.contains("multipart")) {
                // content may contain attachments
                Multipart multiPart = (Multipart) message.getContent();
                int numberOfParts = multiPart.getCount();
                for (int partCount = 0; partCount < numberOfParts; partCount++) {
                    MimeBodyPart part = (MimeBodyPart) 

        multiPart.getBodyPart(partCount);
                    if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition())) {
                        // this part is attachment
                        String fileName = part.getFileName();
                        attachFiles += fileName + ", ";
                        part.saveFile(saveDirectory + File.separator + fileName);
                    } else {
                        // this part may be the message content
                        messageContent = part.getContent().toString();
                    }
                }

                if (attachFiles.length() > 1) {
                    attachFiles = attachFiles.substring(0, attachFiles.length() - 2);
                }
            } else if (contentType.contains("text/plain")
                    || contentType.contains("text/html")) {
                Object content = message.getContent();
                if (content != null) {
                    messageContent = content.toString();
                }
            }

            // print out details of each message
            System.out.println("Message #" + (i + 1) + ":");
            System.out.println("\t From: " + from);
            System.out.println("\t Subject: " + subject);
            System.out.println("\t Sent Date: " + sentDate);
            System.out.println("\t Message: " + messageContent);
            System.out.println("\t Attachments: " + attachFiles);
        }

        // disconnect
        folderInbox.close(false);
        store.close();
    } catch (NoSuchProviderException ex) {
        System.out.println("No provider for pop3.");
        ex.printStackTrace();
    } catch (MessagingException ex) {
        System.out.println("Could not connect to the message store");
        ex.printStackTrace();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
   }

   /**
   * Runs this program with Gmail POP3 server
   */
  public static void main(String[] args) {
    String host = "pop.gmail.com";
    String port = "995";
    String userName = "your_email";
    String password = "your_password";

    String saveDirectory = "E:/Attachment";

    EmailAttachmentReceiver receiver = new EmailAttachmentReceiver();
    receiver.setSaveDirectory(saveDirectory);
    receiver.downloadEmailAttachments(host, port, userName, password);

 }
 }

公共类EmailAttachmentReceiver{
私有字符串保存目录；
/**
*设置存储附加文件的目录。
*@param dir目录的绝对路径
*/
公共void setSaveDirectory（字符串目录）{
this.saveDirectory=dir；
}
/**
*下载新邮件并将附件保存到磁盘（如果有）。
*@param主机
*@param端口
*@param用户名
*@param密码
*/
public void downloadEmailAttachments（字符串主机、字符串端口、，
字符串用户名、字符串密码）{
属性=新属性（）；
//服务器设置
properties.put（“mail.pop3.host”，host）；
properties.put（“mail.pop3.port”，port）；
//SSL设置
properties.setProperty（“mail.pop3.socketFactory.class”，
“javax.net.ssl.SSLSocketFactory”）；
properties.setProperty（“mail.pop3.socketFactory.fallback”、“false”）；
properties.setProperty（“mail.pop3.socketFactory.port”，
字符串.valueOf（port））；
Session Session=Session.getDefaultInstance（属性）；
试一试{
//连接到消息存储
Store Store=session.getStore（“pop3”）；
store.connect（用户名、密码）；
//打开收件箱文件夹
Folder folderInbox=store.getFolder（“收件箱”）；
folderInbox.open（文件夹只读）；
//从服务器获取新邮件
Message[]arrayMessages=folderInbox.getMessages（）；
for（int i=0；i1）{
attachFiles=attachFiles.substring（0，attachFiles.length（）-2）；
}
}else if（contentType.contains（“text/plain”）
||contentType.contains（“text/html”））{
对象内容=message.getContent（）；
如果（内容！=null）{
messageContent=content.toString（）；
}
}
//打印出每封邮件的详细信息
System.out.println（“消息#”+（i+1）+“：”；
System.out.println（“\t-From:”+From）；
System.out.println（“\t主题：“+主题”）；
System.out.println（“\t发送日期：“+sentDate”）；
System.out.println（“\t Message:+messageContent”）；
System.out.println（“\t附件：“+attachFiles”）；
}
//断开
folderInbox.close（假）；
store.close（）；
}捕获（无此提供异常例外）{
System.out.println（“pop3没有提供程序”）；
例如printStackTrace（）；
}捕获（消息例外）{
System.out.println（“无法连接到消息存储”）；
例如printStackTrace（）；
}捕获（IOEX异常）{
例如printStackTrace（）；
}
}
/**
*使用Gmail POP3服务器运行此程序
*/
公共静态void main（字符串[]args）{
String host=“pop.gmail.com”；
字符串端口=“995”；
String userName=“您的电子邮件”；
String password=“您的密码”；
字符串saveDirectory=“E:/Attachment”；
EmailAttachmentReceiver receiver=新的EmailAttachmentReceiver（）；
receiver.setSaveDirectory（saveDirectory）；
receiver.downloadEmailAttachments（主机、端口、用户名、密码）；
}
}

首先，纠正这些错误

显然，服务器认为您提供了错误的用户名和密码。如果您打开，您可能会发现服务器认为错误的更多线索。您可能还需要将“mail.debug.auth”属性设置为“true”，以查看完整的身份验证协议交换。

import com.packaging.dbconnection.Database；
import com.packaging.dbconnection.Database;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.search.FromTerm;
import javax.mail.search.SearchTerm;

/**
 * This program demonstrates how to download e-mail messages and save
 * attachments into files on disk.
 *
 * @author www.codejava.net
 *
 */
public class EmailAttachmentReceiver {
    private String saveDirectory;

/*vxcvxcv*/

    /**
     * Sets the directory where attached files will be stored.
     * @param dir absolute path of the directory
     */
    public void setSaveDirectory(String dir) {
        this.saveDirectory = dir;
    }

    /**
     * Downloads new messages and saves attachments to disk if any.
     * @param host
     * @param port
     * @param userName
     * @param password
     */
    public void downloadEmailAttachments(String host, String port,
            String userName, String password) {

        PreparedStatement pst;
        ResultSet rs;

        Properties properties = new Properties();
        properties.setProperty("mail.store.protocol", "imaps");

        //session reading

        // server setting
      //  properties.put("mail.pop3.host", host);
     //   properties.put("mail.pop3.port", port);

        // SSL setting
    //    properties.setProperty("mail.pop3.socketFactory.class",
    //            "javax.net.ssl.SSLSocketFactory");
    //    properties.setProperty("mail.pop3.socketFactory.fallback", "false");
    //    properties.setProperty("mail.pop3.socketFactory.port",
   //             String.valueOf(port));



        try {
            // connects to the message store
            Session session = Session.getDefaultInstance(properties);
            Store store = session.getStore();
            //store.connect(userName, password);

            store.connect("imap.gmail.com", "yourmail@gmail.com", "yourpass");
            //Folder inbox = store.getFolder("INBOX");
           // inbox.open(Folder.READ_ONLY);



            // opens the inbox folder
            Folder folderInbox = store.getFolder("INBOX");
            folderInbox.open(Folder.READ_ONLY);

            // fetches new messages from server
            SearchTerm sender = new FromTerm(new InternetAddress("xyz@gmail.com"));
         //   Message[] messages = inbox.search(sender);
            Message[] arrayMessages = folderInbox.search(sender);

            for (int i = 0; i < arrayMessages.length; i++) {
                Message message = arrayMessages[i];
                Address[] fromAddress = message.getFrom();
                String from = fromAddress[0].toString();
                String subject = message.getSubject();
                String sentDate = message.getSentDate().toString();

                String contentType = message.getContentType();
                String messageContent = "";

                // store attachment file name, separated by comma
                String attachFiles = "";

                if (contentType.contains("multipart")) {
                    // content may contain attachments
                    Multipart multiPart = (Multipart) message.getContent();
                    int numberOfParts = multiPart.getCount();
                    for (int partCount = 0; partCount < numberOfParts; partCount++) {
                        MimeBodyPart part = (MimeBodyPart) multiPart.getBodyPart(partCount);
                        if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition())) {
                            // this part is attachment
                            String fileName = part.getFileName();
                            attachFiles += fileName + ", ";
                            part.saveFile(saveDirectory + File.separator + fileName);
                        } else {
                            // this part may be the message content
                            messageContent = part.getContent().toString();
                        }
                    }

                    if (attachFiles.length() > 1) {
                        attachFiles = attachFiles.substring(0, attachFiles.length() - 2);
                    }
                } else if (contentType.contains("text/plain")
                        || contentType.contains("text/html")) {
                    Object content = message.getContent();
                    if (content != null) {
                        messageContent = content.toString();

                    }
                }

                // print out details of each message
                System.out.println("Message " + (i + 1) + ":");
                System.out.println("\t From: " + from);
                System.out.println("\t Subject: " + subject);
                System.out.println("\t Recieved Date: " + sentDate);
                System.out.println("\t Message: " + messageContent);
                System.out.println("\t Attachments: " + attachFiles);

                try{
                String driver="com.mysql.jdbc.Driver";
                String url="jdbc:mysql://localhost:3306/dbname";
                String user="root";
                String pass="";

                Class.forName(driver);
                Connection con=DriverManager.getConnection(url,user,pass);
                pst=con.prepareStatement("insert into applications() VALUES (?,?,?,?,?)");
                pst.setString(1,i+"1"); 
                pst.setString(2,from);
                pst.setString(3,subject);
                pst.setString(4,sentDate);
                pst.setString(5,attachFiles);


                int j = pst.executeUpdate();
                if(con!=null){
                System.out.println("connected");
                 }
                }
                catch (ClassNotFoundException ex) {
                    Logger.getLogger(EmailAttachmentReceiver.class.getName()).log(Level.SEVERE, null, ex);
                }
                catch (SQLException ex) {
                    Logger.getLogger(EmailAttachmentReceiver.class.getName()).log(Level.SEVERE, null, ex);
                }
            }

            // disconnect
            folderInbox.close(false);
            store.close();

        } catch (NoSuchProviderException ex) {
            System.out.println("No provider for pop3.");
            ex.printStackTrace();
        } catch (MessagingException ex) {
            System.out.println("Could not connect to the message store");
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    /**
     * Runs this program with Gmail POP3 server
     */
    public static void main(String[] args) {
        String host = "pop.gmail.com";
        String port = "995";
        String userName = "yourmail@gmail.com";
        String password = "yourpass";

        String saveDirectory = "D:/Attachment";

        EmailAttachmentReceiver receiver = new EmailAttachmentReceiver();
        receiver.setSaveDirectory(saveDirectory);
        receiver.downloadEmailAttachments(host, port, userName, password);

    }
}

导入java.io.File；
导入java.io.IOException；
导入java.sql.Connection；
导入java.sql.DriverManager；
导入java.sql.PreparedStatement；
导入java.sql.ResultSet；
导入java.sql.SQLException；
导入java.util.Properties；
导入java.util.logging.Level；
导入java.util.logging.Logger；
导入javax.mail.Address；
导入javax.mail.Folder；
导入javax.mail.Message；
导入javax.mail.MessaginException；
导入javax.mail.Multipart；
导入javax.mail.NoSuchProviderException；
导入javax.mail.Part；
导入javax.mail.Session；
导入javax.mail.Store；
导入javax.mail.internet.InternetAddress；
导入javax.mail.internet.MimeBodyPart；
导入javax.mail