how to extract a page content of a PDF, save its stream data t

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how to extract a page content of a PDF, save its stream data t

how to extract a page content of a PDF, save its stream data t

2006-08-18 - By Hiep Tran

Back
Hi members,

I would like to extract one or some PDF files, save their stream to disk and
after that create a new PDF document adding these stream data to newly
document.

I tried to do as below but when I open newly document sometime the Acrobat
Reader said lack some font, or some object, etc. I used the method
getPageContent() and getPageContent of class PdfReader to extract stream
data and add data to new document.

// Get page stream data

public static byte[] GetPage(String p_szFileName, int p_iPageIndex)

{

byte[] arrData = null;

try

{

PdfReader reader = new PdfReader(p_szFileName);

if((p_iPageIndex >= 0) && (p_iPageIndex <
reader.getNumberOfPages()))

{

arrData = reader.getPageContent(p_iPageIndex + 1);

}

}

catch (Exception ex)

{

ex.printStackTrace();

}

return arrData;

}

// Create file from page

public static boolean CreateFile(String p_szFileName, byte[] p_arrPage)

{

boolean blRet = false;

try

{

Document documentTemp = new Document();

ByteArrayOutputStream baos = new ByteArrayOutputStream();

PdfWriter writerTemp = PdfWriter.getInstance (documentTemp,
baos);

documentTemp.open();

writerTemp.setPageEmpty(false);

documentTemp.close();

ByteArrayInputStream bais = new
ByteArrayInputStream(baos.toByteArray());

PdfReader reader = new PdfReader(bais);

reader.setPageContent(1, p_arrPage);

Document document = new
Document(reader.getPageSizeWithRotation(1));

PdfCopy writer = new PdfCopy(document, new
FileOutputStream(p_szFileName));

document.open();

writer.addPage(writer.getImportedPage(reader, 1));

document.close();

blRet = true;

}

catch (Exception ex)

{

ex.printStackTrace();

}

return blRet;

}

// Test

public static void test()

{

if(CreateFile("test.pdf", GetPage("abc.pdf", 0)))

{

System.out.println("Wow!!!!!!!!!!!!!!!!!!!!!!");

}

else

{

System.out.println(":-(");

}

}

Thanks,

Tran

<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas
-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">

<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>

</style>

</head>

<body lang=EN-US link=blue vlink=purple>

<div class=Section1>

Hi members,<o:p></o:p>

<o:p> </o:p>

I would like to extract one or some PDF files, save their
stream to disk and after that create a new PDF document adding these stream
data to newly document.<o:p></o:p>

<o:p> </o:p>

I tried to do as below but when I open newly document
sometime the Acrobat Reader said lack some font, or some object, etc. I used
the method getPageContent() and getPageContent of class PdfReader to extract
stream data and add data to new document.<o:p></o:p>

<o:p> </o:p>

    // Get page stream data<o:p></o:p>


    public static byte[] GetPage(String p
_szFileName, int
p_iPageIndex)<o:p></o:p>

    {<o:p></o:p>

        byte[] arrData =
null;<o:p></o:p>

        try<o:p></o:p>

        {<o:p></o:p>

          
  PdfReader reader = new PdfReader(p_szFileName);<o:p></o:p>

          
  if((p_iPageIndex >= 0) &&
(p_iPageIndex < reader.getNumberOfPages()))<o:p></o:p>

          
  {<o:p></o:p>

          
      arrData = reader.getPageContent(p_iPageIndex
+ 1);<o:p></o:p>

          
  }<o:p></o:p>

        }<o:p></o:p>

        catch (Exception
ex)<o:p></o:p>

        {<o:p></o:p>

          
  ex.printStackTrace();<o:p></o:p>

        }<o:p></o:p>

        <o:p></o:p>

        return arrData;<o
:p></o:p>

    }<o:p></o:p>

<o:p> </o:p>

   // Create file from page<o:p></o:p>

    public static boolean CreateFile(String p
_szFileName,
byte[] p_arrPage)<o:p></o:p>

    {<o:p></o:p>

        boolean blRet =
false;<o:p></o:p>

<o:p> </o:p>

        try<o:p></o:p>

        {<o:p></o:p>

          
  Document documentTemp = new Document();<o:p></o:p>

          
  ByteArrayOutputStream baos = new
ByteArrayOutputStream();<o:p></o:p>

          
  PdfWriter writerTemp = PdfWriter.getInstance
(documentTemp, baos);<o:p></o:p>

          
  documentTemp.open();<o:p></o:p>

          
  writerTemp.setPageEmpty(false);<o:p></o:p>

          
  documentTemp.close();<o:p></o:p>

          
  <o:p></o:p>

          
  ByteArrayInputStream bais = new
ByteArrayInputStream(baos.toByteArray());<o:p></o:p>

          
  PdfReader reader = new PdfReader(bais);<o:p></o:p>

          
  reader.setPageContent(1, p_arrPage);<o:p></o:p>

          
  <o:p></o:p>

          
  Document document = new
Document(reader.getPageSizeWithRotation(1));<o:p></o:p>

          
  PdfCopy writer = new PdfCopy(document, new
FileOutputStream(p_szFileName));<o:p></o:p>

          
  document.open();<o:p></o:p>

          
  writer.addPage(writer.getImportedPage(reader,
1));<o:p></o:p>

          
  document.close();<o:p></o:p>

          
  <o:p></o:p>

          
  blRet = true;<o:p></o:p>

        }<o:p></o:p>

        catch (Exception
ex)<o:p></o:p>

        {<o:p></o:p>

          
  ex.printStackTrace();<o:p></o:p>

        }<o:p></o:p>

<o:p> </o:p>

        return blRet;<o:p
></o:p>

    }<o:p></o:p>

<o:p> </o:p>

    // Test<o:p></o:p>

    public static void test()<o:p></o:p>

    {<o:p></o:p>

        if(CreateFile(
"test.pdf", GetPage("abc.pdf",
0)))<o:p></o:p>

        {<o:p></o:p>

          
 
System.out.println("Wow!!!!!!!!!!!!!!!!!!!!!!");<o:p></o:p>

        }<o:p></o:p>

        else<o:p></o:p>

        {<o:p></o:p>

          
  System.out.println(":-(");<o:p></o:p>

        }<o:p></o:p>

    }<o:p></o:p>

<o:p> </o:p>

Thanks,<o:p></o:p>

Tran<o:p></o:p>

</div>

</body>

</html>

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