java – 以Pdf附件的形式发送电子邮件作为流
作者:互联网
我想发送一个Pdf作为电子邮件附件(我正在使用JavaMail API).我把Pdf(由jasper生成)作为byte [].
public InputStream exportPdfToInputStream(User user) throws ParseErrorException, MethodInvocationException, ResourceNotFoundException, JRException, IOException{
JasperPrint jasperPrint = createJasperPrintObject(user);
byte[] pdfByteArray = JasperExportManager.exportReportToPdf(jasperPrint);
return new ByteArrayInputStream(pdfByteArray);
}
这是我用来构建将成为附件的MimeBodyPart的代码:
if (arrayInputStream != null && arrayInputStream instanceof ByteArrayInputStream) {
MimeBodyPart attachment = new MimeBodyPart(arrayInputStream);
attachment.setHeader("Content-Type", "application/pdf");
mimeMultipart.addBodyPart(attachment);
}
这段代码给了我这个错误:
javax.mail.MessagingException: IOException while sending message;
nested exception is:
java.io.IOException: Error in encoded stream: needed at least 2 valid base64 characters, but only got 1 before padding character (=), the 10 most recent characters were: "\24\163\193\n\185\194\216#\208="
解决方法:
您使用的构造函数用于从传输中解析mime部分.
你的第二个例子应该正确.你可以考虑一下
>不要转换为InputStream并返回,这将产生不必要的副本
>添加处置(例如bp.setDisposition(Part.ATTACHMENT);)
标签:java,email,mime-types,javamail 来源: https://codeday.me/bug/20191004/1852270.html