【发布时间】：2018-01-20 08:46:10
【问题描述】：
在使用默认 JavaMail 服务向 Google App Engine 项目添加内联图像时，难以收到要发送的电子邮件。无法理解为什么它不发送。当我没有 imagePart 时它工作正常。有谁知道我在这里做错了什么？或者我该如何调试呢？非常感激。谢谢...
public void run(){
try{
//email body
String htmlMessage = "<html>Hi there,<br>";
htmlMessage += "See this cool pic: <img src=\"cid:ID1\" />";
htmlMessage += "And this cool pic: <img src=\"cid:ID2\" />";
htmlMessage += "</html>";
//image part
Map<String, String> inlineImages = new HashMap<String, String>();
inlineImages.put("ID1", "/img/home-icon.png");
inlineImages.put("ID2", "https://storage.googleapis.com/logophilia/default/Logophilia.png");
//send to
String useremail = "some.email@gmail.com";
//email method below
sendImage(useremail,htmlMessage,inlineImages);
}
}
下面的这个方法是电子邮件的发送方式。
public static void sendImage(String useremail, String htmlBody,
Map<String, String> mapInlineImages){
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
//app engine requires this for some reason
String msgBody = "...";
try {
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("someaddress.mail@gmail.com", "An Image test from website"));
msg.addRecipient(Message.RecipientType.TO,
new InternetAddress(useremail, "Admin"));
msg.setSubject("Image test");
msg.setText(msgBody);
// creates message part
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(htmlBody, "text/html");
// creates multi-part
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
// adds inline image attachments
if (mapInlineImages != null && mapInlineImages.size() > 0) {
Set<String> setImageID = mapInlineImages.keySet();
for (String contentId : setImageID) {
MimeBodyPart imagePart = new MimeBodyPart();
imagePart.setHeader("Content-ID", "<" + contentId + ">");
imagePart.setDisposition(MimeBodyPart.INLINE);
//commenting out the stuff below makes it work...
String imageFilePath = mapInlineImages.get(contentId);
try {
imagePart.attachFile(imageFilePath);
} catch (IOException ex) {
ex.printStackTrace();
}
multipart.addBodyPart(imagePart);
}
}
msg.setContent(multipart);
Transport.send(msg);
} catch (AddressException e) {
// ...
} catch (MessagingException e) {
// ...
} catch (UnsupportedEncodingException e) {
// ...
}
}
【问题讨论】：
标签： java google-app-engine jakarta-mail