I am using iText to generate PDF and is working fine, and I can also download it via browser as PDF. However, is it possible for java or iText to convert it to JPEG or any IMAGE file and allow users to download the image file.
response.setContentType("application/pdf; charset=utf-8");
Merely changing the contentType to image/jpg is not possible. I am continuously looking for answer but struggling to find one.
Any idea would be a lot of help
I dont know more about iText. But using PDFBox we can convert pdf document into images.
After splitting you can push images to response.
Here some reference links :
http://pdfbox.apache.org/commandlineutilities/PDFToImage.html
Converting a PDF into multiple JPGs with iText or other
http://www.javatpoint.com/example-to-display-image-using-servlet
you can use iText only for generating a pdf nothing else. see the link http://itextpdf.com/itext.php . see this to convert a pdf to image. See this link as well for clearer understanding with an example.
Related
We are currently using Jasper report to generate pdf. But recently we come to problem where we need to render HTML code in pdf. And HTML code contains images. Images sources can be both http URL or base64 string.
How can we solve the problem? Or which library can we use to solve the problem?
I'm using pdfbox (1.8) to handle pdf on Windows (7 and above). I need to take an input pdf and convert to a pdf made by the same page but used as image (no text selectable etc etc). With small file i have no problem but when i have to convert bigger file i have no clue due to massive memory use.
I will post some code if it helps but the approach i'm using is simple: create a document by all the page saved as image taken from the source pdf.
I'm searching for some more memory and time efficent way to do this (i have to handle pdf with 1 or 2 k of pages).
I know it's possible to convert an HTML file to PDF using Google Drive (HTML2PDF using Google Drive API) but I'd like to know if this HTML has images and CSS files is possible and how to do that.
You need convert HTML to a Docs file and export it as PDF. During the docs conversion most of the non-trivial styles are being trimmed. Basic coloring, sizing and positioning will all you'll get. The exported PDF is the Docs' file's PDF version. Images will be preserved though.
You can make experiments by uploading your html files to Google Drive on drive.google.com with conversion settings on and see the results.
For images you could try this: Embedding Base64 Images
Worked for me when uploading by web. Should work with my solution https://stackoverflow.com/a/21711109/592042
Css can be written right into html file.
I'm trying to insert and read qrcode's from PDF files. To create/read qr codes from images i'm using zxing project and to manipulate the pdf i'm using Big Faceless PDF.
Everything works well if i create the QR Code, insert into my pdf, and then read the images from the pdf and convert the correct one to QR Code. However, if i try to to read images from a scanned document (with a qr code sticker attach to it), i cannot obtain the qr code image from the pdf (the only image i can get, using Big Faceless PDF, is the document it self).
Does anyone knows a Java library to search in pdf files for qr codes?
Thanks for you help
The only reliable way to do this is to convert the PDF page to a bitmap, then using something like zxing to scan the entire page for the barcode. Extracting the individual images that make up the page won't work on every document: the barcode may be created using graphics operations rather than as an embedded image (that's how we do it), or if you PDF was scanned from a paper source as you've described, it will usually be one big image.
Once you've got the PDF converted to a bitmap, ZXing should be able to do this, at least in theory. Naturally I'd recommend sticking with us for the conversion to bitmap ;-)
If ZXing is having trouble finding the code, make sure it has enough white-space around it - you need 4 clear modules on all sides, so for smaller codes it should be about 10% of the width of the code in whitespace around the code, to help it scan.
Cheers... Mike (CTO#BFO)
I have gotten this to work:
Use Imagick to converts pdfs into pngs
Use Zxing \ QrReader to read the QR data
Please point us in right direction
We have a requirement to
Generate a PDF
Edit/Enter some fields on it
Save/Print the information
Should have a button on the pdf "Convert to TIFF" that should generate TIFF image of that PDF
I am sure we can do 1 and 2 very easily, we are planning to use iText API.
We dont have any clue about 4.
Experts if you have any idea please let us know.
We are using Java
There are lots of programs which do PDF to image conversion (both Open Source and Commercial). You can also use icepdf, Jpedal, Qoppa and PDFRenderer
You can create, edit and fill PDF form fields using Gnostice PDFOne. PDFOne can also print PDF documents and forms. Existing documents can also export PDF pages to image formats. For exporting to TIFF, you will also need for Advaned Imaging IO library from Oracle (Sun). Disclaimer: I work for this company.
If you want a button on the PDF to export the document to TIFF, then that is not possible, as PDF specification does not describe such a feature. As mentioned earlier, any PDF document can be converted to image formats including TIFF.
DISCLAIMER: I work for Gnostice.