Baars, Peter wrote:
Hello,First of all I want to complement you on the great library you guys created. I really appreciate it!I would like to report a bug when trying to merge a large number of PDF documents. I created a simple testcase and added the code to this mail.
I don't understand your code and I can't reproduce the "bug" you mention. You are referring to a bug that was fixed in iTextSharp, not in iText. Although I don't like the way you concatenate the files (using PdfWriter instead of PdfCopy or PdfSmartCopy), I threw away all the ballast from your code and made it simpler. Please adapt the example (without making it more complex) so that the problem can be reproduced. best regards, Bruno
import java.io.FileOutputStream;
import java.io.IOException;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
/**
* PDF utility class
* Used for a number of generic functions for handling or creating PDF files.
*/
public class PdfUtil {
/**
* Merge multiple PDF's into one
* @param inputstreams collection of pdf files as a inputstream
* @return a merged PDF file as a byte[]
* @throws IOException problem reading input files.
* @throws DocumentException problem merging files.
*/
public void mergePdfFiles(String[] files)
throws IOException, DocumentException
{
if (files == null || files.length == 0) return;
Document doc = new Document();
PdfWriter writer = PdfWriter.getInstance(doc, new
FileOutputStream("test.pdf"));
doc.open();
PdfContentByte cb = writer.getDirectContent();
for (int i = 0; i < files.length; i++) {
System.err.println(files[i] + " " + i);
PdfReader reader = new PdfReader(files[i]);
for (int x=1; x<= reader.getNumberOfPages(); x++) {
doc.newPage();
PdfImportedPage page =
writer.getImportedPage(reader, x);
//determine if the page needs to be rotated
int rotation = reader.getPageRotation(x);
if (rotation == 90 || rotation == 270)
{
cb.addTemplate(page, 0,-1f, 1f, 0, 0,
reader.getPageSizeWithRotation(x).getHeight());
} else {
cb.addTemplate(page, 1f, 0, 0, 1f, 0,
0);
}
}
}
doc.close();
}
public static void main(String[] args) throws Exception{
String[] files = new String[100];
for (int i = 0; i < 50; i++) {
files[i * 2] = "test1.pdf";
files[i * 2 + 1] = "test2.pdf";
}
PdfUtil util = new PdfUtil();
util.mergePdfFiles(files);
System.out.println("finished");
}
}
test1.pdf
Description: Adobe PDF document
test2.pdf
Description: Adobe PDF document
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