Save edited pdf Page in A4 size using itext

[Sarika Sukumaran]

I need to edit a specific page from a PDF file and I have to save that page only as a separate PDF file. I have successfully completed the job. The input file is of letter size pages. But now what I need is to save the edited page in A4 size. Can anyone help me. I am waiting for the responses.

Following is my code.

    import java.awt.Color;
    
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    import com.lowagie.text.Chunk;
    import com.lowagie.text.Document;
    import com.lowagie.text.DocumentException;
    import com.lowagie.text.Element;
    import com.lowagie.text.Font;
    import com.lowagie.text.Paragraph;
    import com.lowagie.text.pdf.ColumnText;
    import com.lowagie.text.pdf.PdfContentByte;
    import com.lowagie.text.pdf.PdfReader;
    import com.lowagie.text.pdf.PdfStamper;
    
    public class pdfEdit {
    
    	private static String INPUTFILE = "./pdf/eng.pdf";
    	private static String OUTPUTFILE = "./pdf/output.pdf";
    	private static String footerRight = "Web content and services";
    	private static String footerLeft = "All Rigths Reserved";
    	private static Document document;
    
    	public static void main(String[] args) throws IOException, DocumentException {
    	
    		document = new Document();		
    		document.open();
    
    		PdfReader reader = new PdfReader(INPUTFILE);
    		PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(OUTPUTFILE));		
    		
    		int editingPage = 3;
    		
    		PdfContentByte cb = stamper.getOverContent(editingPage);
    		cb.rectangle(10, 10, 550, 30);
    		cb.setRGBColorFill(255, 255, 255);
    		cb.fill();
    
    		PdfContentByte cByte = stamper.getOverContent(editingPage);
    		editFooterText(cByte);
    		reader.selectPages(Integer.toString(editingPage));
    		      
    		stamper.close();
    		document.close();
    	}
    

    	private static void editFooterText(PdfContentByte cByte) throws DocumentException {
    
    		Font footerFont = new Font(Font.HELVETICA, 5f, Font.NORMAL, Color.BLACK);
    		
    		ColumnText cTextLeft = new ColumnText(cByte);
    		Paragraph leftPara = new Paragraph();
    		cTextLeft.setAlignment(Element.ALIGN_LEFT);
    		cTextLeft.setSimpleColumn(document.left(), 10, 500, document.bottom());
    		Chunk strFooterLeft = new Chunk(footerLeft, footerFont);
    		leftPara.add(strFooterLeft);
    		cTextLeft.addElement(leftPara);
    		cTextLeft.go();
    		
    		ColumnText cTextRight = new ColumnText(cByte);
    		cTextRight.setSimpleColumn(document.left(), 10, 430, document.bottom());
    		Paragraph Rightpara = new Paragraph();
    		Chunk strfooterRight = new Chunk(footerRight, footerFont);
    		Rightpara.setAlignment(Element.ALIGN_RIGHT);
    		Rightpara.add(strfooterRight);
    		cTextRight.addElement(Rightpara);
    		cTextRight.go();
    	}    	
    }

[Tim Moores]

There aren't all that many things iText (or any open source PDF API) can do with a PDF once it's been generated. Editing in particular is tricky or downright impossible, so I'm fairly certain that a change in page size isn't possible.

[Sarika Sukumaran]

Thanks for your reply..

[Sarika Sukumaran]

Document document = new Document(PageSize.A4);		
		PdfReader reader = new PdfReader(OUTPUTFILE);		
		PdfWriter writer = PdfWriter.getInstance(document,	new FileOutputStream("./pdf/new.pdf"));
		
		document.open();
		PdfImportedPage page = writer.getImportedPage(reader, 1);
		Image instance = Image.getInstance(page);
		document.add(instance);		
		
		reader.close();
		document.close(); 

Is there anyway to add the pdf page not as an instance of Image?

[Sarika Sukumaran]

Saving in A4 size

private static void createPDFFile() throws FileNotFoundException {
        OutputStream outputStream = new FileOutputStream("./A4SizePdf.pdf");
        Document document = new Document(PageSize.A4, 40, 40, 40, 40);
        try {

            PdfWriter writer = PdfWriter.getInstance(document, outputStream);
            PdfReader reader = new PdfReader(./InputPdf.pdf);
            reader.setViewerPreferences(editedPageNo);

            PdfImportedPage page = writer.getImportedPage(reader, 1);
            document.open();                

            PdfContentByte cb = writer.getDirectContent();
            cb.addTemplate(page, 1.4f, 0, 0, 1.19f, -13, 7);
            document.close();
            outputStream.close();           
            setFooter();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (document.isOpen())
                document.close();
            try {
                if (outputStream != null)
                    outputStream.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }

    }