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//前略
 
private String mailType="text/html; charset=UTF-8";
private String fileName="D:\\projects\\Java\\mail\\test2.jpg";
...
 
MimeBodyPart mimeBody1=new MimeBodyPart(); //處理郵件本體
mimeBody1.setContent(this.mailContent, mailType); //郵件內文與格式
 
...
 
mimeBody2.setDataHandler(new DataHandler(fds)); //附件Data head
mimeBody2.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));
 
multiPart.addBodyPart(mimeBody1);
multiPart.addBodyPart(mimeBody2);
msg.setContent(multiPart);
 
Transport.send(msg); //寄出信件

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This is a test mail.<br>
<img src="test2.jpg" alt="picture">
<br><br>
--End of test message--測試中文

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This is a test mail.
[圖片有顯示出來]

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This is a test mail.
[x]  <- 圖片顯示不出來，變成討厭的叉叉

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<img src="http://myServer/image/test2.jpg" alt="picture">

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...前略
 
StringBuffer sb=new StringBuffer();
sb.append("This is a test mail.<br>");
sb.append("Mail from: "+this.mailFrom+"<br>");
sb.append("Attachment file is: "+this.fileName);
sb.append("<img src=\"cid:image\" alt=\"picture\">");
sb.append("<br><br>");
sb.append("--End of test message--測試中文");
 
MimeBodyPart mimeBody1=new MimeBodyPart(); //處理郵件本體
mimeBody1.setContent(sb.toString(), "text/html; charset=UTF-8"); //郵件內文與格式
 
MimeBodyPart mimeBody2=new MimeBodyPart();
FileDataSource fds=new FileDataSource(this.fileName); //附件
mimeBody2.setDataHandler(new DataHandler(fds)); //附件Data head
mimeBody2.setHeader("Content-ID", "<image>");
//下面這行設定附件檔名，如附件圖檔僅供顯示也可不必設定
mimeBody2.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));
...
後略