javamail使用qq邮箱发送邮件失败的解决方法

Properties properties = new Properties();
properties.setProperty("mail.host", "smtp.qq.com");
properties.setProperty("mail.transport.protocol", "smtp");
properties.setProperty("mail.smtp.auth", "true");
Authenticator authenticator = new EmailAuthenticator("[email protected]", "密码（此处密码为从QQ邮箱的【设置】->【账户】->【POP3/IMAP/SMTP...】中获取的授权码）");
Session session = Session.getDefaultInstance(properties, authenticator);
session.setDebug(true);
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("发送邮件的邮箱地址"));
message.setRecipient(Message.RecipientType.TO, new InternetAddress("发送给的邮箱地址"));
message.setSubject("测试邮件");
message.setContent("测试", "text/html;charset=UTF-8");
Transport.send(message);

使用以上配置用QQ邮箱发送邮件失败，会有如下错误

DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.qq.com", port 25, isSSL false
220 smtp.qq.com Esmtp QQ Mail Server
DEBUG SMTP: connected to host "smtp.qq.com", port: 25

EHLO DESKTOP-CS5ULU0
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "73400320"
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "MAILCOMPRESS", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM 
DEBUG SMTP: AUTH LOGIN command trace suppressed
DEBUG SMTP: AUTH LOGIN failed

javax.mail.AuthenticationFailedException: 530 Error: A secure connection is requiered(such as ssl). More information at http://service.mail.qq.com/cgi-bin/help?id=28

    at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:826)
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:761)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685)
    at javax.mail.Service.connect(Service.java:317)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at javax.mail.Transport.send0(Transport.java:194)
    at javax.mail.Transport.send(Transport.java:124)
    at com.thinvent.platform.platformmanage.popup.actions.SendMailJob.runInWorkspace(SendMailJob.java:110)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)

解决方法：
把properties中的配置换成如下配置

Properties properties = new Properties();
properties.setProperty("mail.host", "smtp.qq.com");
properties.setProperty("mail.transport.protocol", "smtp");
properties.setProperty("mail.smtp.auth", "true");
properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
properties.setProperty("mail.smtp.port", 465);
properties.setProperty("mail.smtp.socketFactory.port", 465);