In this post we’ll see a Java program to merge two PDF documents using iText library.
To know more about iText library and PDF examples check this post – Generating PDF in Java Using iText Tutorial
Merging PDFs using iText
In iText there is a PDFMerger class that can be used for merging PDFs. Using this class you can merge a number of existing documents into one.
Following Java program shows how two PDF documents can be merged using iText.
import java.io.IOException;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.utils.PdfMerger;
public class MergePDF {
public static final String SRC_PDF1 = "F://knpcode//PDF1.pdf";
public static final String SRC_PDF2 = "F://knpcode//PDF2.pdf";
public static final String MERGED_PDF = "F://knpcode//result//Merged.pdf";
public static void main(String[] args) throws IOException{
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(MERGED_PDF));
PdfMerger merger = new PdfMerger(pdfDoc);
PdfDocument PDF1 = new PdfDocument(new PdfReader(SRC_PDF1));
PdfDocument PDF2 = new PdfDocument(new PdfReader(SRC_PDF2));
merger.merge(PDF1, 1, PDF1.getNumberOfPages());
merger.merge(PDF2, 1, PDF2.getNumberOfPages());
PDF1.close();
PDF2.close();
pdfDoc.close();
}
}
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