Question

我正在尝试使用软件包javax.mail.*

发送电子邮件

在Eclipse中一切正常，但是导出到Runnable Jar后，电子邮件将不会发送。您能帮我理解可能是什么问题吗？如果使用"using javax.mail.*"时遇到问题，是否可以使用其他库？

导出时，我使用“将所需的库打包到生成的JAR中”

谢谢。

import java.io.IOException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart; 

public class sadasddas {

    public static String ErrorMsg;
    private static final String MAIL_SERVER = "smtp";
    private static final String SMTP_HOST_NAME = "smtp.mail.com";
    private static final int SMTP_HOST_PORT = 587;
    private static final String USER_NAME = "someting@mail.com";  
    private static final String PASSWORD = "*****************";

    public static void main(String[] args) {
        String[] to = { "dest@mail.com" }; 
        String subject = "Java Send Mail Attachement Example";
        String body = "Welcome to Java Mail!<h1>Hello</h1>";
        String[] attachFiles = new String[3];
        attachFiles[0] = "C:/Til/Result/download.txt";
        attachFiles[1] = "C:/Til/Result/Printer.txt";
        attachFiles[2] = "C:/Til/Result/software.txt";
        try {
            sendEmailWithAttachments(to, subject, body, attachFiles);
            System.out.println("Email Sent....!");
        } catch (Exception ex) {
            System.out.println("Could not send email....!");
            ex.printStackTrace();
        }
    }
    public static void sendEmailWithAttachments(String[] to, String subject, String body, String[] attachFiles) throws AddressException, MessagingException {
       Properties properties = System.getProperties();     
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", SMTP_HOST_NAME);
        properties.put("mail.smtp.user", USER_NAME);
        properties.put("mail.smtp.password", PASSWORD);
        properties.put("mail.smtp.port", SMTP_HOST_PORT);
        properties.put("mail.smtp.auth", "true");
        Authenticator auth = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(USER_NAME, PASSWORD);
            }
        }; 
        Session session = Session.getInstance(properties, auth);        
        MimeMessage message = new MimeMessage(session);
        try {       
            message.setFrom(new InternetAddress(USER_NAME));
            InternetAddress[] toAddress = new InternetAddress[to.length];
            for( int i = 0; i < to.length; i++ ) {
                toAddress[i] = new InternetAddress(to[i]);
            }
            for( int i = 0; i < toAddress.length; i++) {
                message.addRecipient(Message.RecipientType.TO, toAddress[i]);
            }
            message.setSubject(subject);
            message.setSentDate(new Date());
            MimeBodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setContent(body, "text/html");
            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(messageBodyPart);
            if (attachFiles != null && attachFiles.length > 0) {
                for (String filePath : attachFiles) {
                    MimeBodyPart attachPart = new MimeBodyPart();
                    try {
                        attachPart.attachFile(filePath);
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                    multipart.addBodyPart(attachPart);
                }
            }
            message.setContent(multipart); 
            Transport transport = session.getTransport(MAIL_SERVER);
            transport.connect(SMTP_HOST_NAME, SMTP_HOST_PORT, USER_NAME, PASSWORD);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
            System.out.println("Sent Message Successfully....");
        }
        catch (AddressException ae) {
            ae.printStackTrace();
        }
        catch (MessagingException me) {
            me.printStackTrace();
        }
    }
}

Answer 1

不仅考虑到您的问题，还考虑到您在评论中所写的内容，问题在于您试图通过双击从桌面运行 jar 文件，您可以使用 GUI 应用程序执行此操作，但不能使用控制台执行此操作应用。对于控制台应用程序，您可以创建一个 .bat 文件来启动 cmd 并在 cmd 中运行 jar 文件。然后您可以在桌面上创建 .bat 文件的快捷方式并双击运行它。

.bat 文件应如下所示：

echo off
start cmd.exe /c
cd /d "d:\path_to_the_jar_file\"
java -jar "My Program.jar"
pause
echo on

运行RUNNABLE JAR文件时邮件不发送

1 个答案: