How to split an existing pdf file using iText jar in Java?

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To split a pdf file using iText jar first download the iText jar files and include in the application classpath.

Steps:

1. Prepare output stream for new pdf file after split process.
2. Call method to split pdf file.
3. Create document and pdfReader objects.
4. Get total no. of pages in the pdf file.
5. Check the startPage should not be greater than the endPage and endPage should not be greater than total no. of pages.
6. Create writer for the outputStream.
7. Open document.
8. Get the PdfContentByte instance from writer object.
9. Write the content in new pdf.
10. Close document and outputStream.

Example:

PDFSplitExample.java

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfWriter;
 
/**
 * This class is used to split an existing pdf file using iText jar.
 * @author w3schools
 */
public class PDFSplitExample {
	static void splitPdfFile(InputStream inputPdf,
            OutputStream outputStream, int startPage,
            int endPage) throws Exception{
		//Create document and pdfReader objects.
		Document document = new Document();
        PdfReader pdfReader = new PdfReader(inputPdf);
 
        //Get total no. of pages in the pdf file.
        int totalPages = pdfReader.getNumberOfPages();
 
        //Check the startPage should not be greater than the endPage
        //and endPage should not be greater than total no. of pages.
        if(startPage > endPage || endPage > totalPages) {
           System.out.println("Kindly pass the valid values " +
           		"for startPage and endPage.");
        }else{
        	 // Create writer for the outputStream
	        PdfWriter writer = 
	            PdfWriter.getInstance(document, outputStream);
 
	        //Open document
	        document.open();
 
	       //Contain the pdf data.
	        PdfContentByte pdfContentByte = 
	        		writer.getDirectContent(); 
	        PdfImportedPage page;
 
	        while(startPage <= endPage) {
	          document.newPage();
	          page=writer.getImportedPage(pdfReader, startPage);
	          pdfContentByte.addTemplate(page, 0, 0);
	          startPage++;
	        }
 
	        //Close document and outputStream.
	        outputStream.flush();
	        document.close();
	        outputStream.close();
        }	       
	}
 
	public static void main(String args[]){
	 try {			
	    //Prepare output stream for 
	    //new pdf file after split process.
            OutputStream outputStream1 = 
            		new FileOutputStream("D:\\SplitFile1.pdf");
            OutputStream outputStream2 = 
            		new FileOutputStream("D:\\SplitFile2.pdf");
 
            //call method to split pdf file.
            splitPdfFile(new FileInputStream("D:\\TestFile.pdf"),
            		outputStream1, 1, 10);    
            splitPdfFile(new FileInputStream("D:\\TestFile.pdf"),
            		outputStream2, 11, 20);  
 
            System.out.println("Pdf file splitted successfully.");
	  } catch (Exception e) {
		e.printStackTrace();
	  }
       }
}

Output:

Pdf file splitted successfully.

Download this example.
 
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