Question

我已经能够使用Java将图像作为附件发送到电子邮件中。我现在正试图在电子邮件正文中发送相同的图像，如下所示：

public static void main(String[] args) throws NoSuchProviderException, MessagingException {
    System.out.println("Sending mail...");
    Properties props = new Properties();
    props.setProperty("mail.smtp.starttls.enable", "true");
    props.setProperty("mail.transport.protocol", "smtp");
    props.setProperty("mail.smtp.auth", "true");
    props.setProperty("mail.smtp.host", "smtp.gmail.com");

props.setProperty("mail.smtp.port", "587");
    props.setProperty("mail.smtp.user", "mysusername");
    props.setProperty("mail.smtp.password", "mypassword");

    Session mailSession = Session.getDefaultInstance(props, null);
    mailSession.setDebug(true);
    Transport transport = mailSession.getTransport();

    MimeMessage message = new MimeMessage(mailSession);
    message.setSubject("HTML  mail with images");
    message.setFrom(new InternetAddress("myaddress@gmail.com"));
    message.setContent
      ("<h1>This is a test</h1>" 
       + "<img src=\"C:/Users/pc/Desktop/Photos/Shammah.PNG\">", 
       "text/html");
    message.addRecipient(Message.RecipientType.TO,
         new InternetAddress("receiver@simbatech.biz"));

    transport.connect();//This is line 46
    transport.sendMessage(message,
        message.getRecipients(Message.RecipientType.TO));
    transport.close();
}

我收到了这个输出：

Sending mail...
DEBUG: setDebug: JavaMail version 1.4ea
DEBUG: getProvider() returning        javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
Exception in thread "main" javax.mail.AuthenticationFailedException
at javax.mail.Service.connect(Service.java:306)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at image.in.body.ImageInBody.main(ImageInBody.java:46)
Java Result: 1

为什么在使用正确的用户名和密码设置为我的Gmail帐户时身份验证失败？

Answer 1

看下面的代码可能会使用完整的

class SimpleMail2 {
    public static void main(String[] args) throws Exception{

        System.out.println("Sending mail...");
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");

        Session mailSession = Session.getDefaultInstance(props,
        new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("sender@gmail.com","password");
            }
        });
        Message message = new MimeMessage(mailSession);
        message.setFrom(new InternetAddress("sender@gmail.com"));
        message.setSubject("HTML  mail with images");
        message.setRecipient(Message.RecipientType.TO, new InternetAddress("receiver@gmail.com"));
        message.setText("Dear Mail Crawler," + "\n\n No spam to my email, please!");

        MimeMultipart multipart = new MimeMultipart("related");
        BodyPart messageBodyPart = new MimeBodyPart();
        String htmlText = "<H1>Raghava chary</H1>" + "<img src=\"cid:image\">";
        messageBodyPart.setContent(htmlText, "text/html");
        multipart.addBodyPart(messageBodyPart);
        try {
            messageBodyPart = new MimeBodyPart();
            InputStream imageStream = SimpleMail2.class.getClass().getResourceAsStream("/ab/log.gif");
            DataSource fds = new ByteArrayDataSource(IOUtils.toByteArray(imageStream), "image/gif");
            messageBodyPart.setDataHandler(new DataHandler(fds));
            messageBodyPart.setHeader("Content-ID","<image>");
            multipart.addBodyPart(messageBodyPart);
            message.setContent(multipart);
            Transport.send(message);
            System.out.println("Done");
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

并添加org.apache.commons.io.jar.zip和axiom-api-1.2.6.jar并添加mail.jar和activation.jar

Answer 2

你需要声明你的图像：

<img src="cid:unique-name-or-id" />

将图像加载为MimeBodyPart，并将unique-name-or-id与MimeBodyPart的FileName相匹配。

Answer 3

创建一个内容处理内联的多部分正文，并在base64中对您的图像进行编码。

检查此SO以获取一些详细信息（在Python中）Sending Multipart html emails which contain embedded images

Answer 4

首先，请参阅common mistakes的这个JavaMail FAQ条目。

然后，请参阅此JavaMail FAQ条目sample code for connecting to Gmail。

请注意，没有“mail.smtp.password”属性。由于您没有提供密码，因此身份验证失败。

Answer 5

另一个常见的错误（今天就是我）：图像的Content-ID标题必须位于＆lt;尖括号＆gt;中。如果不这样做会破坏一些邮件程序（gmail，OS X 10.10），而不会破坏其他邮件程序（Outlook，iOS＆lt; = 8.1）。

使用Java在Email Body中发送图像

5 个答案: