Splitting PDF File Using Java iText API

Posted by Mohaideen Jamil in Java, Java PDF

 
Previously I wrote a tutorial about how to merge two or more PDF files. This tutorial we will learn about splitting a PDF with multiple pages into multiple PDFs using the Java iText API.
 

Library Required

 
itext-2.1.4.jar
 
File: SplitPDF.java
 

package com.simplecode.util;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

public class SplitPDF {
	// Split PDF files in Java using iText JAR

	public static void main(String[] args) {
	 try {
	 	SplitPDF.splitPDF(new FileInputStream("C:\File.pdf"),
			new FileOutputStream("C:\Output1.pdf"), 1, 15);

		SplitPDF.splitPDF(new FileInputStream("C:\File.pdf"),
			new FileOutputStream("C:\Output2.pdf"), 15, 30);

	     } catch (Exception e) {
		System.err.println(e.getMessage());
	     }
	}

	public static void splitPDF(FileInputStream inputStream,
			FileOutputStream outputStream, int fromPage, int toPage) {

		Document document = new Document();

		try {
			PdfReader inputPDF = new PdfReader(inputStream);
			int totalPages = inputPDF.getNumberOfPages();

			// Make fromPage equals to toPage if it is greater
			if (fromPage > toPage) {
				fromPage = toPage;
			}
			if (toPage > totalPages) {
				toPage = totalPages;
			}

			// Create a writer for the outputstream
			PdfWriter writer = PdfWriter.getInstance(document, outputStream);
			document.open();
			// Holds the PDF data
			PdfContentByte cb = writer.getDirectContent();
			PdfImportedPage page;

			while (fromPage <= toPage) {
				document.newPage();
				page = writer.getImportedPage(inputPDF, fromPage);
				cb.addTemplate(page, 0, 0);
				fromPage++;
			}
			outputStream.flush();
			document.close();
			outputStream.close();
		} catch (Exception e) {
			System.err.println(e.getMessage());
		} finally {
			if (document.isOpen())
				document.close();
			try {
				if (outputStream != null)
					outputStream.close();
			} catch (IOException ioe) {
				System.err.println(ioe.getMessage());
			}
		}
	}
}

Merge PDF files using java iText

Posted by Mohaideen Jamil in Java, Java PDF | 1 comment

Library Required

 
itext-2.1.4.jar
 
File: MergePDF.java
 

package com.simplecode.util;

//Please include the itext-2.1.4.jar in the classpath
import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;

public class MergePDF {

	public static void main(String[] arg) {
	try {
		List<InputStream> pdfs = new ArrayList<InputStream>();
		pdfs.add(new FileInputStream("C:\File1.pdf"));
		pdfs.add(new FileInputStream("C:\File2.pdf"));
		OutputStream output = new FileOutputStream("C:\Merge.pdf");
                // boolean flag that represents whether you need to include page number or not
		MergePDF.concatPDFs(pdfs, output, true);
	}

	catch (Exception e)
	{
		System.err.println("Exception occurs : " + e.getMessage());
	}
	}


	public static void concatPDFs(List<InputStream> streamOfPDFFiles,
			OutputStream outputStream, boolean paginate) {

	Document document = new Document();

	try {
		List<InputStream> pdfs = streamOfPDFFiles;
		List<PdfReader> readers = new ArrayList<PdfReader>();
		int totalPages = 0;
		Iterator<InputStream> iteratorPDFs = pdfs.iterator();

		// Create Readers for the pdfs.
		while (iteratorPDFs.hasNext()) {
			InputStream pdf = iteratorPDFs.next();
			PdfReader pdfReader = new PdfReader(pdf);
			readers.add(pdfReader);
			totalPages += pdfReader.getNumberOfPages();
		}

		// Create a writer for the outputstream
		PdfWriter writer = PdfWriter.getInstance(document, outputStream);
		document.open();
		BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
				BaseFont.CP1252, BaseFont.NOT_EMBEDDED);


		// Holds the PDF data
		PdfContentByte cb = writer.getDirectContent();

		PdfImportedPage page;
		int currentPageNumber = 0;
		int pageOfCurrentReaderPDF = 0;
		Iterator<PdfReader> iteratorPDFReader = readers.iterator();

		// Loop through the PDF files and add to the output.
		while (iteratorPDFReader.hasNext()) {
			PdfReader pdfReader = iteratorPDFReader.next();

		// Create a new page in the target for each source page.
			while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
			      document.newPage();
			      pageOfCurrentReaderPDF++;
			      currentPageNumber++;
			      page = writer.getImportedPage(pdfReader,pageOfCurrentReaderPDF);
			      cb.addTemplate(page, 0, 0);

				// Code for pagination.
				if (paginate) {
				     cb.beginText();
				     cb.setFontAndSize(bf, 9);
				     cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""
				     + currentPageNumber + " of " + totalPages, 520, 5, 0);
				     cb.endText();
				}
			}
			pageOfCurrentReaderPDF = 0;
		}
		outputStream.flush();
		document.close();
		outputStream.close();
	}
	
	catch (Exception e) {
		System.err.println("Exception : " + e.getMessage());
	}
	
	finally {
		if (document.isOpen())
			document.close();
		
		try {
			if (outputStream != null)
				outputStream.close();
		    }
		
		catch (IOException ioe) {
			System.err.println("Exception : " + ioe.getMessage());
		}
	}
	}
}

 
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Splitting PDF File Using Java iText API