JavaMail 需要一个 InputStreamSource 来为每次调用创建一个新的流

Question

我正在尝试通过 Spring 2.5 的 MailSender 使用 JavaMail 发送附件，但我不断收到此错误：

Passed-in Resource contains an open stream: invalid argument.
JavaMail requires an InputStreamSource that creates a fresh stream for every call.

我正在使用InputStreamResource：

InputStream crofileInputStream = emailDraft.getAttachmentCroFile().getInputStream();
InputStream nacfileInputStream = emailDraft.getAttachmentNacFile().getInputStream();
InputStream sourcefileInputStream = emailDraft.getAttachmentSourceFile().getInputStream();

InputStreamSource[] attachments = {new InputStreamResource(crofileInputStream),new InputStreamResource(nacfileInputStream),new InputStreamResource(sourcefileInputStream)};

sentEmailLog = mailSenderService.sendMIMEMessage(emailDraft, attachmentFileNames, attachments);

最后一条指令调用 MimeMessageHelper.addAttachment(fileName,attachments[i])每个附件。

请问我怎么解决这个问题？

谢谢你的帮助。

Answer 1

尝试使用 javax.mail.util.ByteArrayDataSource

String mailTo = message.getHeaders().get("emailAddress", String.class); 
MimeMessage mimeMessage = sender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
ByteArrayDataSource attachment = new ByteArrayDataSource(message.getPayload(), "application/octet-stream");
helper.addAttachment("document.zip", attachment);
helper.setText("text content of the email");

您还可以查看此示例：https : //www.javatips.net/api/javax.mail.util.bytearraydatasource