使用java邮件将图像嵌入到html电子邮件中 [英] Embedding images into html email with java mail

问题描述

我使用 javamail 发送 html 和图像，但由于某种原因，我没有将图像视为 html 的一部分，我只将它们视为附件.我不知道这是为什么.这是我的一个用户收到电子邮件时的样子:

I am sending html and images with javamail but for some reason I don't see the images as part of the html, I see them only as an attachment. I don't know why is that. This is how it looks like when one of my users receive an email:

我还想提一下 html 的样子:

I would like to mention also that is how the html looks like:

private String generateActivationLinkTemplate() {
    String htmlText = "";
htmlText ="<table width="600" border="0" cellspacing="0" cellpadding="0">  <tr>    <td><img src="cid:logoimg"/></td>  </tr>  <tr>    <td height="220"> <p>Thanks for Joining Site.com</p>      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>    <p>Username:<br />      Password: </p>    <p>To confirm your email click <a href="#">here</a>.</p></td>  </tr>  <tr>    <td height="50" align="center" valign="middle" bgcolor="#CCCCCC">www.site.com | [e-mail] | [phone]</td>  </tr></table>";}

我需要 html、body 和 head 标签吗...?

Do I need an html,body, and a head tag...?

Java 实现如下所示:

This is how the java implementation looks like:

@Stateless(name = "ejbs/EmailServiceEJB")
public class EmailServiceEJB implements IEmailServiceEJB {

@Resource(name = "mail/myMailSession")
private Session mailSession;

public void sendAccountActivationLinkToBuyer(String destinationEmail,
        String name) {

    // Destination of the email
    String to = destinationEmail;
    String from = "[e-mail]";

    try {
        Message message = new MimeMessage(mailSession);
        // From: is our service
        message.setFrom(new InternetAddress(from));
        // To: destination given
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(to));
        message.setSubject("Uspijesna registracija");
        // How to found at http://www.rgagnon.com/javadetails/java-0321.html
        message.setContent(generateActivationLinkTemplate(), "text/html");

        Date timeStamp = new Date();
        message.setSentDate(timeStamp);

        // Prepare a multipart HTML
        Multipart multipart = new MimeMultipart();
        // Prepare the HTML
        BodyPart htmlPart = new MimeBodyPart();
        htmlPart.setContent(generateActivationLinkTemplate(), "text/html");

        // PREPARE THE IMAGE
        BodyPart imgPart = new MimeBodyPart();

        String fileName = "logoemailtemplate.png";

        ClassLoader classLoader = Thread.currentThread()
                .getContextClassLoader();
        if (classLoader == null) {
            classLoader = this.getClass().getClassLoader();
            if (classLoader == null) {
                System.out.println("IT IS NULL AGAIN!!!!");
            }
        }

        DataSource ds = new URLDataSource(classLoader.getResource(fileName));

        imgPart.setDataHandler(new DataHandler(ds));
        imgPart.setHeader("Content-ID", "logoimg");

        multipart.addBodyPart(imgPart);
        multipart.addBodyPart(htmlPart);            

        // Set the message content!
        message.setContent(multipart);

        Transport.send(message);

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }

}

我认为 java 部分对我来说看起来不错，但我怀疑只是 html 标记，我有什么问题吗?我认为 img 标签无法正常工作，并且图片没有出现在电子邮件中(注意它仅作为附件出现):

I think the java part to me looks fine, but i am suspicious only is the html markup, i there something wrong with it? I think that the img tag is not working properly and for not reason the image dont appear on the email(Notice it only appears down as an attachment):

<img src="cid:logoimg"/>

推荐答案

您是否检查过 content-type 是否正确且图像 content-disposition 设置为 inline?

Have you checked the content-type is correct and the image content-disposition is set to inline?

此外，Content-ID 需要全局唯一，不能只说logoimg".试试 [e-mail].不过，这可能不是你的问题.

Also Content-ID needs to be globally unique, you can't just say "logoimg". Try [e-mail]. That may not be your problem though.

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