We recently released a new version of our Java PDF library JPedal, which allows developers to merge PDF files using interleaving. Download a JPedal trial jar to try it out!
What is interleaving?
To interleave two or more PDF files means to combine them into a single document where the output file contains alternating pages from each input file.
For example, say you have document A with 4 pages, and document B with 5 pages. The result would look like: A1, B1, A2, B2, A3, B3, A4, B4, B5.
One example of when you might want to use this would be merging multiple copies of the same form with different answers filled in. Using an interleave merge here would make it a lot easier to compare the different answers.
How to merge with interleaving in Java
Once you have downloaded a JPedal jar, and added it to your Java project, you can use the following lines of code:
final ArrayList options = new ArrayList<>();
options.add(MergeOption.INTERLEAVE);
PdfMerge.mergeFiles(new File("inputFile1.pdf"), new File("inputFile2.pdf"), new File("outputFile.pdf"), options);
Download JPedal now
You may download a trial copy of JPedal to get familiar with how it works.
Learn more
Learn more about the PDF Merge API.
We can help you better understand the PDF format as developers who have been working with the format for more than 2 decades!
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.