Question

我创建了一个简单的spring应用程序，它向用户发送一封电子邮件。这似乎完全适用于＆＃34; SimpleMailMessage＆＃34; （整个信息是纯文本）。我想要的是发送一些文件作为附件，所以我试图使用javax.mail.internet.MimeMessage但得到一些有线错误，我无法追查。以下是我的代码段

try {
            javax.mail.internet.MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(message,true);
            helper.setTo(employee.getEmailId());
            helper.setFrom("abc@xyz.com");
            helper.setText(mailMessage, true);
            helper.setSubject(subject);
            FileSystemResource res = new FileSystemResource(new File("C:/software/Koala.jpeg"));
            helper.addAttachment("happyBirthday", res);
            mailSender.send(message);
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

错误是：

Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "javax.mail.internet.MimeBodyPart.setDataHandler(Ljavax/activation/DataHandler;)V" the class loader (instance of org/jboss/classloader/spi/base/BaseClassLoader) of the current class, org/springframework/mail/javamail/MimeMessageHelper, and the class loader (instance of org/jboss/classloader/spi/base/BaseClassLoader) for resolved class, javax/mail/internet/MimeBodyPart, have different Class objects for the type n/DataHandler;)V used in the signature
    at org.springframework.mail.javamail.MimeMessageHelper.addAttachment(MimeMessageHelper.java:997)
    at org.springframework.mail.javamail.MimeMessageHelper.addAttachment(MimeMessageHelper.java:1077)
    at org.springframework.mail.javamail.MimeMessageHelper.addAttachment(MimeMessageHelper.java:1047)
    at Example1.sendEmail(Example1.java:89)

真的很感激任何帮助。

Answer 1

尝试使用Byte []类型，您必须使用以下代码将文件转换为Byte []：

Path path = Paths.get("path/to/file");
byte[] content = Files.readAllBytes(path);

当您准备发送邮件时调用此函数：

public void sendEmail(String to,String from,String sub,String msgBody,byte[] content){

    MimeMessage message = mailSender.createMimeMessage();
    try {
        MimeMessageHelper helper = new MimeMessageHelper(message, true);
        helper.setFrom(from);
        helper.setTo(to);
        helper.setSubject(sub);
        helper.setText(msgBody);
        helper.addAttachment("MyTestFile.txt", new ByteArrayResource(content));
        mailSender.send(message);
    } catch (MessagingException e) {

        e.printStackTrace();
    }
}

Answer 2

尝试一下，这种对邮件进行附件的方法对我有用。

MimeMesage msg=javaMailSender.createMimeMessage();

msg.addRecipient(Message.RecipientType.TO,InternetAddress(email));
msg.setSubject("Subject");

Multipart emailContent=new MimeMultipart();
MimeBodyPart textBodyPart=new MimeBodyPart();
textBodyPart.setText("My multipart");

MimeBodyPart jpgBodyPart=new MimeBodyPart();
jpgBodyPart.attachFile("C:/software/Koala.jpeg");

emailContent.addBodyPart(textBodyPart);
emailContent.addBodyPart(jpgBodyPart);

msg.setContent(emailContent);
javaMailSender.send(msg);

Answer 3

除了

外，一切看起来都不错

FileSystemResource res = new FileSystemResource(new File("C:/software/Koala.jpeg"));

您只需执行此操作即可将文件附加到邮件中。

helper.addAttachment("happyBirthday", new File("C:/software/Koala.jpeg"));

使用Spring JavaMailSender将文件作为附件或内联发送

3 个答案: