小编ami*_*mit的帖子

以下是我发送电子邮件的代码:

    Properties props = new Properties();
    props.put("mail.smtp.host", host);
    props.put("mail.debug", "false");

    final Session session = Session.getInstance(props);
    final Message msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(from));
    msg.setRecipients(Message.RecipientType.TO, toAddress);
    msg.setSubject(subject);
    msg.setSentDate(new Date());
    Multipart multipart = new MimeMultipart("related");
    BodyPart mbp1 = new MimeBodyPart();
    mbp1.setContent(body, "text/html");         
    multipart.addBodyPart(mbp1);
    Transport.send(msg);

错误堆栈跟踪:

javax.mail.NoSuchProviderException: smtp
    at javax.mail.Session.getService(Session.java:764)
    at javax.mail.Session.getTransport(Session.java:689)
    at javax.mail.Session.getTransport(Session.java:632)
    at javax.mail.Session.getTransport(Session.java:612)
    at javax.mail.Session.getTransport(Session.java:667)
    at javax.mail.Transport.send0(Transport.java:154)
    at javax.mail.Transport.send(Transport.java:80)

注意:

1. 如果作为桌面应用程序执行,相同的代码.但是在tomcat上部署时抛出异常.
2. 最新的mail.jar和smtp.jar被添加到库中.
3. SMTP主机地址也是正确的.

如果有人可以指点我会有所帮助.

我经历了许多类似的话题，但没有运气！！

我想使用 PEM 文件生成公钥和私钥。以下是我使用的代码：

        String pemFileNme = "C:\\Users\\amitmm\\Desktop\\clean\\key.pem";

        File pubKeyFile = new File(pemFileNme);
        File privKeyFile = new File(pemFileNme);

        // read public key DER file
        DataInputStream dis = new DataInputStream(new 
        FileInputStream(pubKeyFile));
        byte[] pubKeyBytes = new byte[(int)pubKeyFile.length()];
        dis.readFully(pubKeyBytes);
        dis.close();

        // read private key DER file
        dis = new DataInputStream(new FileInputStream(privKeyFile));
        byte[] privKeyBytes = new byte[(int)privKeyFile.length()];
        dis.read(privKeyBytes);
        dis.close();

        KeyFactory keyFactory = KeyFactory.getInstance("RSA");

        // decode public key
        X509EncodedKeySpec pubSpec = new X509EncodedKeySpec(pubKeyBytes);
        RSAPublicKey pubKey = (RSAPublicKey) 
        keyFactory.generatePublic(pubSpec);

        // decode private key
        PKCS8EncodedKeySpec privSpec = …