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我的 Java 程序停止使用我的 gmail 帐户发送电子邮件

本文介绍了我的 Java 程序停止使用我的 gmail 帐户发送电子邮件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在这里和其他地方搜索了几个相关的帖子，但没有一个能解决我的问题.我有一个使用javamail API"向一组人发送电子邮件的程序.它曾经工作得很好.今天我又需要了，但我无法发送任何电子邮件...我的 sendEmail 方法如下:

I searched several related posts here and in other places, but none of them solved my problem. I have a program that sends emails to a set of people using "javamail API". It worked fine once. Today I needed again, but I cannot send any email... My sendEmail method is the following:

public void sendEmail(String userName, String password, String toAddress,
       String subject, String message, String[] attachFiles)
       throws AddressException, MessagingException {

     // sets SMTP properties
    Properties properties = new Properties();
    properties.put("mail.smtp.host", "smtp.gmail.com");
    properties.put("mail.smtp.port", "587");
    properties.put("mail.smtp.auth", "true");
    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.user", userName);
    properties.put("mail.password", password);

    // creates a new session with an authenticator
    Authenticator auth = new SMTPAuthenticator(userName, password);
    Session session = Session.getInstance(properties, auth);

    // creates a new e-mail message
    MimeMessage msg = new MimeMessage(session);

    try {
        msg.setFrom(new InternetAddress(userName, "My name"));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    InternetAddress[] toAddresses = {new InternetAddress(toAddress)};
    msg.setRecipients(Message.RecipientType.TO, toAddresses);
    msg.setSubject(subject);
    msg.setSentDate(new Date());

    // creates message part
    MimeBodyPart messageBodyPart = new MimeBodyPart();
    messageBodyPart.setContent(message, "text/html");

    // creates multi-part
    Multipart multipart = new MimeMultipart();
    multipart.addBodyPart(messageBodyPart);

    // adds attachments
    if (attachFiles != null && attachFiles.length > 0) {
        for (String filePath : attachFiles) {
            addAttachment(multipart, filePath);
        }
    }

    // sets the multi-part as e-mail's content
    msg.setContent(multipart);

    // sends the e-mail
    Transport.send(msg);

}

所以，现在尝试调用此方法时出现以下错误(我使用的是 jdk 1.7.0_21):

So, now the attempt to call this method I got the following error(I'm using jdk 1.7.0_21):

Sending email Failed...

javax.mail.MessagingException: Could not convert socket to TLS;
  nested exception is:
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1907)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:666)
    at javax.mail.Service.connect(Service.java:367)
    at javax.mail.Service.connect(Service.java:226)
    at javax.mail.Service.connect(Service.java:175)
    at javax.mail.Transport.send0(Transport.java:253)
    at javax.mail.Transport.send(Transport.java:124)
    at EmailSender.sendEmail(EmailSender.java:86)
    at CFP_LaWasp_EmailSender.sendCFPLaWasp(CFP_LaWasp_EmailSender.java:178)
    at CFP_LaWasp_EmailSender.main(CFP_LaWasp_EmailSender.java:220)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1886)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
    at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
    at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
    at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)
    at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:528)
    at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:465)
    at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1902)
    ... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
    at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
    at sun.security.validator.Validator.validate(Validator.java:260)
    at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)
    ... 19 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
    at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
    ... 25 more

我不知道如何解决这个问题，因为它以前可以工作......另外，我不知道我的 Gmail 是否与此有关(如果它阻止了此访问......)

I don't know how to solve this issue, since it used to work before... Also, I don't know if my Gmail has something to do with this (if it blocked this access...)

感谢您的帮助.

推荐答案

关键错误是这样的:

原因:sun.security.provider.certpath.SunCertPathBuilderException:无法找到请求目标的有效证书路径

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

请参阅此 JavaMail 常见问题解答条目.

由于您要连接到 Gmail，因此不应发生这种情况.最可能的原因是:

Since you're connecting to Gmail, this shouldn't happen. The most likely causes are:

  • 有防火墙或防病毒程序拦截了您的请求.
  • 您的 JDK 安装出现问题，无法找到受信任的证书颁发机构
  • 您在覆盖了 JDK 的受信任证书颁发机构列表的应用服务器中运行

这篇关于我的 Java 程序停止使用我的 gmail 帐户发送电子邮件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-03 10:29
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