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Hi there
I'm also trying to accomplish concatenation between n -number of
PDF-documents...
I'm using XSL-FO and Apache FOP to create my PDF's but
sometimes I need to concat multiple PDF documents. I'm no java expert but I've
tried to create an other version of com.lowagie.tools.concat_pdf from the iText
(version 1.0) project called MergePdfByteArrays. The concat_pdf class works just
fine from a command-tool but I'm hold my pdf-documents as byte[] in memory, not
as files and my output is either a database or as HTTP response from a
servlet... My code don't through any exceptions and the document seems to be
generated the same source code the concat_pdf except that some lines at the end
of the file i missing ;(...
A buffer/fushing problem???
Here is my code
for MergePdfByteArrays and a testing servlet.
package mypackage;
import java.io.*;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
/**
* This class concat PDF-files stored in byte[]'s in memory
* @author Erik Gulliksen
*/
public class MergePdfByteArrays
{
private ByteArrayOutputStream outStream = new ByteArrayOutputStream();
private Document document = null;
private PdfCopy writer = null;
public MergePdfByteArrays()
{ super(); }
ByteArrayOutputStream getOutputStream()
{ return this.outStream; }
void setOutputStream(ByteArrayOutputStream outStreamInput)
{ this.outStream = outStreamInput; }
public byte[] getMergedPdfByteArray()
{
if(this.outStream != null )
{ return this.outStream.toByteArray(); }
else
{ return null;}
}
public void add(byte[] pdfByteArray)
{
try
{
PdfReader reader = new PdfReader(pdfByteArray);
int numberOfPages = reader.getNumberOfPages();
if(this.document == null)
{
this.document = new Document(reader.getPageSizeWithRotation(1));
this.writer = new PdfCopy( this.document, this.getOutputStream() );
this.document.open();
}
PdfImportedPage page;
for(int i = 0; i < numberOfPages; )
{
++i;
page = this.writer.getImportedPage(reader, i);
this.writer.addPage(page);
}
PRAcroForm form = reader.getAcroForm();
if(form != null)
{ this.writer.copyAcroForm(reader); }
}
catch(Exception e)
{ e.printStackTrace(); }
}
public void close()
{
try
{
this.document.close();
this.outStream.close();
}
catch(Exception e)
{ e.printStackTrace(); }
}
}
/***********************************************
*** - Test of MergePdfByteArrays, servlet - ***
***********************************************/
package mypackage;
import com.lowagie.tools.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.*;
import mypackage.*;
public class TestMerge extends HttpServlet
{
private static final String CONTENT_TYPE = "application/pdf";
public void init(ServletConfig config) throws ServletException
{ super.init(config); }
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException
{ this.doPost( request, response); }
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException
{
response.setContentType(CONTENT_TYPE);
response.setHeader("Content-disposition", "inline; filename=test.pdf");
ServletOutputStream out = response.getOutputStream();
try
{
// Testing with the same two file that worked vel with command-line tool
File docA = new File("C:\\test\\fileA.pdf");
File docB = new File("C:\\test\\fileB.pdf");
byte[] byteA = new byte[ (int)docA.length() ];
byte[] byteB = new byte[ (int)docB.length() ];
FileInputStream fileInStreamA = new FileInputStream(docA);
FileInputStream fileInStreamB = new FileInputStream(docB);
fileInStreamA.read(byteA);
fileInStreamB.read(byteB);
MergePdfByteArrays pdfMerger = new MergePdfByteArrays();
pdfMerger.add(byteA);
pdfMerger.add(byteB);
ByteArrayOutputStream finalOutStream = pdfMerger.getOutputStream();
response.setContentLength(finalOutStream.size());
finalOutStream.writeTo(out);
out.flush();
pdfMerger.close();
}
catch(IOException ioe)
{ ioe.printStackTrace(); }
out.close();
}
}
Do some know a solution to my problem, or do anyone have a different
aproache that works?
Thanks!
-Erik
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