Question

当我使用JavaMailSender发送带有附件的电子邮件时，它总是失败并抛出以下异常：

org.springframework.mail.MailSendException: Failed messages: javax.mail.MessagingException: IOException while sending message;
  nested exception is:
    java.io.IOException: Exception writing Multipart
; message exception details (1) are:
Failed message 1:
javax.mail.MessagingException: IOException while sending message;
  nested exception is:
    java.io.IOException: Exception writing Multipart
    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1365)
    at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:462)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:359)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:354)

这是我的代码

MimeMessage message = mailSender.createMimeMessage();
try {
    MimeMessageHelper helper = new MimeMessageHelper(message, true);
    helper.setFrom(userName);
    helper.setTo(toAddress);
    helper.setSubject(subject);
    FileSystemResource file = new FileSystemResource(filePath);
    helper.addAttachment(file.getFilename(), file);
} catch (Exception e) {
    log.error("oops..., ", e);
}
mailSender.send(message);

Answer 1

em，我已经运气解决了这个问题。

只需设置带有附件的空白文本内容即可，

helper.addAttachment(MimeUtility.encodeText("")), new ByteArrayResource(IOUtils.toByteArray(inputStream)));
helper.setText("", true);

Answer 2

设置内容类型，我通过将内容类型设置为第三个参数来解决了这个问题

helper.addAttachment（“附件文件名”，新的ByteArrayResource（IOUtils.toByteArray（inputStream）），“ application / pdf” ）;

带有编写多部分异常的JavaMailSender

2 个答案: