Java邮件-附件和＆嵌入式图像

dbalakirev：

这次，我遇到了一个稍微复杂的问题：我想将附件和图像结合在一起。

import java.io.IOException;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
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 MailTest
{

    public static void main(String[] args) throws AddressException, MessagingException, IOException
    {
        String host = "***";
        String from = "***";
        String to = "***";

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

        // Setup mail server
        props.put("mail.smtp.host", host);

        // Get session
        Session session = Session.getDefaultInstance(props, null);

        // Define message
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject("Hello JavaMail");

        // Handle attachment 1
        MimeBodyPart messageBodyPart1 = new MimeBodyPart();
        messageBodyPart1.attachFile("c:/Temp/a.txt");

        // Handle attachment 2
        MimeBodyPart messageBodyPart2 = new MimeBodyPart();
        messageBodyPart2.attachFile("c:/Temp/b.txt");

        FileDataSource fileDs = new FileDataSource("c:/Temp/gti.jpeg");
        MimeBodyPart imageBodypart = new MimeBodyPart();
        imageBodypart.setDataHandler(new DataHandler(fileDs));
        imageBodypart.setHeader("Content-ID", "<myimg>");
        imageBodypart.setDisposition(MimeBodyPart.INLINE);

        // Handle text
        String body = "<html><body>Elotte<img src=\"cid:myimg\" width=\"600\" height=\"90\" alt=\"myimg\" />Utana</body></html>";

        MimeBodyPart textPart = new MimeBodyPart();
        textPart.setHeader("Content-Type", "text/plain; charset=\"utf-8\"");
        textPart.setContent(body, "text/html; charset=utf-8");

        MimeMultipart multipart = new MimeMultipart("mixed");

        multipart.addBodyPart(textPart);
        multipart.addBodyPart(imageBodypart);
        multipart.addBodyPart(messageBodyPart1);
        multipart.addBodyPart(messageBodyPart2);

        message.setContent(multipart);

        // Send message
        Transport.send(message);
    }
}

当我在Gmail中打开电子邮件时，一切都很好：我有两个附件，并且图像显示在邮件的内容中（在img标签中）。

问题出在Thunderbird和RoundCubic网络邮件上：每一个都缺少图像，并以附件的形式显示在底部。

我该如何工作？

s106mo：

org.apache.commons.mail库中的ImageHtmlEmail的使用也很方便。（更新：它仅包含在1.3版的快照中）例如：

  HtmlEmail email = new ImageHtmlEmail();
  email.setHostName("mail.myserver.com");
  email.addTo("[email protected]", "John Doe");
  email.setFrom("[email protected]", "Me");
  email.setSubject("Test email with inline image");

  // embed the image and get the content id
  URL url = new URL("http://www.apache.org/images/asf_logo_wide.gif");
  String cid = email.embed(url, "Apache logo");

  // set the html message
  email.setHtmlMsg(htmlEmailTemplate, new File("").toURI().toURL(), false);

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