Question

我正在尝试通过我的网站（JSF网站）发送电子邮件，该网站已部署在apache服务器上，但我一直收到“拒绝连接：连接”的信息，但是如果我直接从NetBeans运行Java应用程序中的代码，代码运行完美。很抱歉，如果我在帖子中犯了一些错误，您可以说这是我第一次发布。：）

    public void sendReplicationCheckResult() {
    String to = "JcbSupportingSystem@jcbank.com.jo";

    // Sender's email ID needs to be mentioned
    String from = "Palestine.IT@jcbank.com.jo";

    // Assuming you are sending email from localhost
    String host = "192.168.52.95";

    // Get system properties
    Properties properties = System.getProperties();

    // Setup mail server
    properties.setProperty("mail.smtp.host", host);
    properties.put("mail.smtp.auth", "false");
    properties.setProperty("mail.smtp.port", "25");

    // Get the default Session object.
    Session session = Session.getDefaultInstance(properties);

    try {
        // Create a default MimeMessage object.
        MimeMessage message = new MimeMessage(session);

        // Set From: header field of the header.
        message.setFrom(new InternetAddress(from));

        // Set To: header field of the header.
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

        // Set Subject: header field
        message.setSubject("Replication Check Results");

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

        // Create a multipart message
        Multipart multipart = new MimeMultipart();

        // Set text message part
    multipart.addBodyPart(messageBodyPart);
        // Part two is attachment
        messageBodyPart = new MimeBodyPart();
        String filename = "C:\\Temp\\ReplicationCheck.pdf";
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(filename);
        multipart.addBodyPart(messageBodyPart);

        // Send the complete message parts
        message.setContent(multipart);

        // Send message
        SMTPTransport t = (SMTPTransport) session.getTransport("smtp");

        // connect
        t.connect(new Socket(host, 25));

        // send
        t.sendMessage(message, message.getAllRecipients());

        System.out.println("Response: " + t.toString());

        t.close();
        Files.deleteIfExists(Paths.get("C:\\Temp\\ReplicationCheck.pdf"));
    } catch (MessagingException mex) {
        mex.printStackTrace();
    } catch (IOException ex) {
        Logger.getLogger(SendEmail.class.getName()).log(Level.SEVERE, null, ex);
    }
}

Answer 1

192.168.52.95是一个LAN地址。在开发环境中，可能有一个邮件服务器在等待东西，而在服务器环境中，192.168.52.95上什么也没有。

您可能想从属性文件中读取主机，这样您就可以在不同的环境中使用不同的主机。

Answer 2

我可以使用以下代码解决问题。我的朋友告诉我，java在apache上部署后，java需要有效的用户名和密码才能连接到smtp服务器，因此我添加了它们，但是在我使用sslsocket连接不正常的套接字后，我的问题得以解决。（t.connect（new Socket（host，25））;）//旧方法 //新代码的使用（t.connect（new SSLSocket（SMTP_SERVER，25））。

private static final String SMTP_SERVER = "smtp server";
private static final String USERNAME = "username";
private static final String PASSWORD = "password";

private static final String EMAIL_FROM = "email from";
private static final String EMAIL_TO = "email to";
private static final String EMAIL_TO_CC = "cc";

private static final String EMAIL_SUBJECT = "Subject";

public void sendReplicationCheckResult() {

    // Get system properties
    Properties properties = System.getProperties();

    // Setup mail server
    properties.setProperty("mail.transport.protocol", "smtp");
    properties.setProperty("mail.smtp.host", SMTP_SERVER);
    properties.setProperty("mail.smtp.port", "25");
    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.smtp.auth", "false");

    // Get the default Session object.
    Session session = Session.getDefaultInstance(properties);

    try {
        // Create a default MimeMessage object.
        MimeMessage message = new MimeMessage(session);

        // Set From: header field of the header.
        message.setFrom(new InternetAddress(EMAIL_FROM));

        // Set To: header field of the header.
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(EMAIL_TO));

        // Set Subject: header field
        message.setSubject(EMAIL_SUBJECT);

        // Create the message part 
        BodyPart messageBodyPart = new MimeBodyPart();

        // Fill the message
//            messageBodyPart.setText("This is message body");
        // Create a multipart message
        Multipart multipart = new MimeMultipart();

        // Set text message part
 //multipart.addBodyPart(messageBodyPart);
        // Part two is attachment
        messageBodyPart = new MimeBodyPart();
        String filename = "File Path";
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName("File Name");
        multipart.addBodyPart(messageBodyPart);

        // Send the complete message parts
        message.setContent(multipart);

        // Send message
        SMTPTransport t = (SMTPTransport) session.getTransport("smtp");

        // connect
        t.connect(new SSLSocket(SMTP_SERVER, 25) {
            @Override
            public String[] getSupportedCipherSuites() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public String[] getEnabledCipherSuites() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setEnabledCipherSuites(String[] strings) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public String[] getSupportedProtocols() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public String[] getEnabledProtocols() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setEnabledProtocols(String[] strings) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public SSLSession getSession() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void addHandshakeCompletedListener(HandshakeCompletedListener hl) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void removeHandshakeCompletedListener(HandshakeCompletedListener hl) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void startHandshake() throws IOException {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setUseClientMode(boolean bln) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public boolean getUseClientMode() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setNeedClientAuth(boolean bln) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public boolean getNeedClientAuth() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setWantClientAuth(boolean bln) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public boolean getWantClientAuth() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void setEnableSessionCreation(boolean bln) {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public boolean getEnableSessionCreation() {
                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }
        });
        // send
        t.sendMessage(message, message.getAllRecipients());

        System.out.println("Response: " + t.toString());

        t.close();
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(null, "Email was sent Successfully"));
    } catch (IOException ex) {
        Logger.getLogger(SendEmail.class.getName()).log(Level.SEVERE, null, ex);
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(null, ex.getLocalizedMessage()));
    } catch (MessagingException ex) {
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(null, ex.getLocalizedMessage()));
        Logger.getLogger(SendEmail.class.getName()).log(Level.SEVERE, null, ex);
    }
}

如何修复'java.net.ConnectException：连接被拒绝：connect'

2 个答案: