Replacing PDF objects
replacestream
JAVA
JAVA
/**
* Example written by Bruno Lowagie in answer to:
* http://stackoverflow.com/questions/21617218/itext-or-itextsharp-rudimentary-text-edit
*
* This is only a partial answer. It's a quick and dirty method showing how to
* change a stream inside a PDF. Obviously, you'll have to detect words that are
* stored in Form XObjects too, and you can seriously screw up the layout when
* you manipulate the content stream as is done in this example.
*/
package sandbox.stamper;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PRStream;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import sandbox.WrapToTest;
@WrapToTest
public class ReplaceStream {
public static final String SRC = "resources/pdfs/hello.pdf";
public static final String DEST = "results/stamper/hello_changed.pdf";
public static void main(String[] args) throws IOException, DocumentException {
File file = new File(DEST);
file.getParentFile().mkdirs();
new ReplaceStream().manipulatePdf(SRC, DEST);
}
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfDictionary dict = reader.getPageN(1);
PdfObject object = dict.getDirectObject(PdfName.CONTENTS);
if (object instanceof PRStream) {
PRStream stream = (PRStream)object;
byte[] data = PdfReader.getStreamBytes(stream);
stream.setData(new String(data).replace("Hello World", "HELLO WORLD").getBytes());
}
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
stamper.close();
reader.close();
}
}