Java PDF Thumbnails

Hi,

I am working on a web application. we have a scenario where we need to display thumbnails of pdf documents.

Here is the code:

	Document pdfDocument = new Document(url);
	// Create stream object to save the output image
	ByteArrayOutputStream imageOutputStream = new ByteArrayOutputStream();
	// Create Resolution object
	Resolution resolution = new Resolution(10);
	// Create BmpDevice object with particular resolution
	BmpDevice bmpDevice = new BmpDevice(resolution);
	// Convert a particular page and save the image to stream
	bmpDevice.process(pdfDocument.getPages().get_Item(pageNo+1), imageOutputStream);
	byte[] pageImage = imageOutputStream.toByteArray();
	String pageImageBase64String = Base64.getEncoder().encodeToString(pageImage);
	// Close the stream
	imageOutputStream.close();
	imageOutputStream.flush();
	pdfDocument.close();
	pdfDocument.dispose();

this returns base64 string to UI.

I am getting out of memory, java heap out of memory exception every time I deal with this particular service. it doesn’t matter what pdf I use it gives OOM. I need to generate thumbnails on fly. please suggest some API to generate Thumbnails without having OOM issues.

@kishantejy12

Thank you for posting.

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