Merging PDF

Merging PDFs with PDFBox is very simple. The readymade API PDFMergerUtility provides convenient methods to specify files to be merged and a destination where the merged PDF should be written.

Refer below code snippet, which merges two PDFs.

public class PDFMerge {
    public static void main(String[] args) throws Exception{
        PDFMergerUtility pdfUtility = new PDFMergerUtility();
        pdfUtility.addSource(new File("d:/temp/simple.pdf"));
        pdfUtility.addSource(new File("d:/temp/with_font_pdf.pdf"));
        pdfUtility.setDestinationFileName("d:/temp/merged.pdf");

        MemoryUsageSetting setting = MemoryUsageSetting.setupMainMemoryOnly();
        pdfUtility.mergeDocuments(setting);
    }
}

Instantiate PDFMergerUtility and invoke addSource method to specify the files to be merged. Specify the location of merged file, use setDestinationFileName.

Later, invoke mergeDocuments which requires memory settings to produce the merged file.