In this tutorial we show you how to rasterize a PDF file into an image in Java. You will need an external library to do this – this example uses our JPedal PDF library. JPedal is the best Java PDF library for developers.
How to Rasterize a PDF file in Java
- Download a trial copy of JPedal and add it to your IDE.
- Create a File handle, InputStream or URL pointing to the PDF file
- Include a password if file password protected
- Open the PDF file
- Iterate over the pages
- Close the PDF file
and the Java code to rasterize PDF…
File file = new File("/path/to/document.pdf");
ConvertPagesToImages extract=new ConvertPagesToImages(file);
//extract.setPassword("password");
if (extract.openPDFFile()) {
int pageCount = extract.getPageCount();
for (int page = 1; page <= pageCount; page++) {
BufferedImage img = extract.getPageAsImage(page, hasAlpha);
}
}
extract.closePDFfile();
What is rasterizing a PDF file?
When you rasterize a PDF file, you convert the pages of the document into raster image files. Rasterizing the file stops editing and removes the need for a PDF viewer to show the pages. This makes it simpler to view. The disadvantage of a raster based image is that you lose all the features of the PDF file and Viewer, and have all the limitations of a bitmap display.
The JPedal PDF library allows you to solve these problems in Java
//Convenience static method (see class for additional options)
ExtractClippedImages.writeAllClippedImagesToDir("inputFileOrDirectory", "outputDir", "outputImageFormat", new String[] {"imageHeightAsFloat", "subDirectoryForHeight"});
final PdfManipulator pdf = new PdfManipulator();
pdf.loadDocument(new File("inputFile.pdf"));
pdf.addPage(1, PaperSize.A4_LANDSCAPE);
pdf.addText(1, "Hello World", 10, 10, BaseFont.HelveticaBold, 12, 1, 0.3f, 0.2f);
pdf.addImage(1, new BufferedImage(), new float[] {0, 0, 100, 100});
pdf.rotatePage(1, 90);
pdf.apply();
pdf.writeDocument(new File("outputFile.pdf"));Viewer viewer = new Viewer();
viewer.setupViewer();
viewer.executeCommand(ViewerCommands.OPENFILE, "pdfFile.pdf");
//Convenience static method (see class for additional options)
ExtractTextAsWordList.writeAllWordlistsToDir("inputFileOrDirectory", "outputDir", -1);
PdfMerge.mergeFiles(new File("inputFile1.pdf"), new File("inputFile2.pdf"), new File("outputFile.pdf"));
PdfManipulator.splitInHalf(new File("inputFile.pdf"), new File("outputFolder"), pageToSplitAt);PrintPdfPages print = new PrintPdfPages("C:/pdfs/mypdf.pdf");
if (print.openPDFFile()) {
print.printAllPages("Printer Name");
}//Convenience static method (see class for additional options)
ExtractClippedImages.writeAllClippedImagesToDir("inputFileOrDirectory", "outputDir", "outputImageFormat", new String[] {"imageHeightAsFloat", "subDirectoryForHeight"});
//Convenience static method (see class for additional options)
ArrayList resultsForPages = FindTextInRectangle.findTextOnAllPages("/path/to/file.pdf", "textToFind");
java -jar jpedal.jar --inspect "inputFile.pdf"PdfSigner.signPdf(
"inputFile.pdf",
"outputFile.pdf",
"keystorePassword",
"keystoreFile.p12",
"signerName",
"signerLocation",
"signingReason",
ACCESS_PERMISSION.P1
);What is JPedal?
JPedal is a commercial Java PDF Library that makes it easy for Java developers to work with PDF Documents in Java.
Why use JPedal?
JPedal makes it much easier to work with PDF files from Java. Because we have been actively developing our Java PDF Toolkit for over 20 years, it works with all those problem PDF files out there.
What licenses are available?
We have 2 licenses available:
'Server' for on premises and cloud servers and 'OEM' for use in a named end user applications. Both are one time fees with options support renewal after 12 months.
How to use JPedal?
Want to learn more about JPedal and how to use it, we have plenty of tutorials and guides to help you.
