Base64 图像转换为 PDF 并作为附件添加到 java 邮件

Question

我有一个图像的 base64 代码，现在要求使用 base64 创建一个包含图像的 PDF（使用 base64 代码）并将其作为电子邮件附件附加，而不将其保存在任何物理位置。这是我迄今为止尝试过的方法，我收到的是 pdf 作为附件，但说它已损坏。

<%
String b64Image=request.getParameter("img_val");
b64Image = b64Image.replace("data:image/png;base64,", "");
b64Image = b64Image.replace(" ", "+");
/*setting all the email properties
.....
.....
*/
BufferedImage image = ImageIO.read(new ByteArrayInputStream(decodedBytes));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Document document = new Document(PageSize.A4, 10, 10, 10, 10);
PdfWriter.getInstance(document, baos);
document.open();
Image image = Image.getInstance(decodedBytes);
image.scalePercent(50);
document.add(image);
document.close(); 
/*after this how to add as email attachment iwas not sure so tried with below code*/

/*with the below code im getting attachment, when i open pdf it is saying as corrupted*/                
byte[] decoded = org.apache.commons.codec.binary.Base64.decodeBase64(b64Image.getBytes());
pdfBodyPart.setDataHandler(new DataHandler(new ByteArrayDataSource(decoded, "application/pdf")));
pdfBodyPart.setFileName("Report.pdf");
pdfBodyPart.setDisposition(MimeBodyPart.ATTACHMENT);
multipart.addBodyPart(pdfBodyPart);
message.setContent(multipart);

%>

如果我做错了什么请告诉我。提前致谢。

Answer 1

我做到了。非常感谢您的建议:)

ByteArrayOutputStream baos = new ByteArrayOutputStream();
            Document document = new Document(PageSize.A4, 10, 10, 10, 10);
            PdfWriter.getInstance(document, baos);
            document.open();
            Image image = Image.getInstance(decodedBytes);
            image.scalePercent(50);
            document.add(image);
            document.close();

            DataSource pdfds = new ByteArrayDataSource(baos.toByteArray(), "application/pdf");
            pdfBodyPart.setDataHandler(new DataHandler(pdfds));
            //pngBodyPart.setHeader("Content-ID", "<dashboard>");
            //pngBodyPart.setDisposition(MimeBodyPart.INLINE);
            pdfBodyPart.setFileName("AnnotatedDashboard.pdf");
            multipart.addBodyPart(pdfBodyPart);
            // Send the complete message parts
            message.setContent(multipart);

Base64 图像转换为 PDF 并作为附件添加到 java 邮件

Base64 Image Conversion to PDF and add as an attachment to java mail

java

pdf

base64

jakarta-mail

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