java - 如何在使用 Java 邮件发送 html 电子邮件时嵌入多个图像

Question

我正在尝试从 javamail 发送电子邮件。我正在嵌入图像并使用 CID。但问题是如何在一条消息中嵌入多个图像。如果我尝试添加 header .. 它只是采用最后设置的 header 。如何使用 CID 添加多个图像和引用。

MimeMultipart multipart = new MimeMultipart("related");

    // first part  (the html)
    BodyPart messageBodyPart = new MimeBodyPart();
//    BodyPart messageBodyPart = new MimeBodyPart();
    String htmlText = "<H1>Hello</H1><br/> <p align=center><img src=\"cid:senny\"> </p>";
    htmlText+="<p align=center><img src=\"cid:senny\"> </p>";
    htmlText+="<p align=center><img src=\"cid:image\"> </p>";
    messageBodyPart.setContent(htmlText, "text/html");

    // add it
    multipart.addBodyPart(messageBodyPart);

    // second part (the image)
    messageBodyPart = new MimeBodyPart();
    DataSource fds = new FileDataSource
      ("C:\\images\\cec_header_457.png");
    DataSource fds1 = new FileDataSource
    ("C:\\images\\cec_header_420.png");
    messageBodyPart.setDataHandler(new DataHandler(fds));
    messageBodyPart.setDataHandler(new DataHandler(fds1));
    messageBodyPart.addHeader("Content-ID","<image>");
    messageBodyPart.addHeader("Content-ID","<senny>");
    // add it
    multipart.addBodyPart(messageBodyPart);

    // put everything together
    message.setContent(multipart);

Answer 1

每张图片都需要有自己的MimeBodyPart，分解这段代码，

// second part (the image)
messageBodyPart = new MimeBodyPart();
DataSource fds = new FileDataSource
  ("C:\\images\\cec_header_457.png");
DataSource fds1 = new FileDataSource
("C:\\images\\cec_header_420.png");
messageBodyPart.setDataHandler(new DataHandler(fds));
messageBodyPart.setDataHandler(new DataHandler(fds1));
messageBodyPart.addHeader("Content-ID","<image>");
messageBodyPart.addHeader("Content-ID","<senny>");
// add it
multipart.addBodyPart(messageBodyPart);

分为两个多部分，类似

// second part (the image)
messageBodyPart = new MimeBodyPart();
DataSource fds1 = new FileDataSource
("C:\\images\\cec_header_420.png");
messageBodyPart.setDataHandler(new DataHandler(fds1));
messageBodyPart.addHeader("Content-ID","<senny>");
// add it
multipart.addBodyPart(messageBodyPart);

messageBodyPart = new MimeBodyPart();
DataSource fds = new FileDataSource
  ("C:\\images\\cec_header_457.png");
messageBodyPart.setDataHandler(new DataHandler(fds));
messageBodyPart.addHeader("Content-ID","<image>");
// add it
multipart.addBodyPart(messageBodyPart);