Rotate Pages in a PDF document using Java

This Java sample code will open a PDF and rotate each page of the document by a 180 degrees. It then prints and saved the rotated PDF document to a different file.

This sample uses jPDFProcess, Qoppa’s Java PDF library to manipulate PDF documents.

package jPDFProcessSamples;
 
import com.qoppa.pdf.PrintSettings;
import com.qoppa.pdfProcess.PDFDocument;
import com.qoppa.pdfProcess.PDFPage;
 
public class RotatePDFPages
{
	/* This sample code will open a PDF and rotate each page of the document by a 180 degrees */
	/* It then prints and saves the rotated document */
 
    public static void main (String [] args)
    {
        try
        {
        	// load original PDF
            PDFDocument pdfDoc = new PDFDocument ("C:\\myfolder\\input.pdf", null);
 
             // Loop through all pages
            for (int i = 0; i < pdfDoc.getPageCount(); i++) 
            {
            	// get page in the original PDF 
                PDFPage page = pdfDoc.getPage(i);
 
                // change the page rotation to flip it by 180 degrees
                page.setPageRotation(180);
            }
 
            // print the document 
            pdfDoc.print(new PrintSettings());
 
            // save the document
            pdfDoc.saveDocument ("C:\\myfolder\\output.pdf");
        }
        catch (Throwable t)
        {
            t.printStackTrace();
        }
    }
 
}
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