Hi Steve,
Thanks for your quick reply.
I took your suggestion and this is what I found.
Writing the large table out in smaller chunks does indeed solve the
OutOfMemory problem.
However, it still takes the same amount of time or even more when I
split the large table into multiple smaller ones.
I am using the code below to do the comparison.
The result is quite consistent.
Are there any suggestions as to how I can get around this
problem?
Thanks again
shangshin
----------------------------------------------------------------
import com.lowagie.text.*;
import com.lowagie.text.Font;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.MultiColumnText;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.PdfPCell;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.awt.*;
public class ExampleLargeTable {
private static final int FRAGMENT_SIZE = 50;
public static void main(String[] args) {
try {
Document document = new Document(PageSize.LETTER);
OutputStream out = new
FileOutputStream("ExampleLargeTable.pdf");
PdfWriter.getInstance(document, out);
document.open();
Font font = FontFactory.getFont("Helvetica", 8, Font.BOLD,
Color.BLACK);
PdfPTable table = new PdfPTable(5);
table.setWidthPercentage(100f);
PdfPCell h1 = new PdfPCell(new Paragraph("Header 1", font));
PdfPCell h2 = new PdfPCell(new Paragraph("Header 2", font));
PdfPCell h3 = new PdfPCell(new Paragraph("Header 3", font));
PdfPCell h4 = new PdfPCell(new Paragraph("Header 4", font));
PdfPCell h5 = new PdfPCell(new Paragraph("Header 5", font));
table.setHeaderRows(1);
table.addCell(h1);
table.addCell(h2);
for (int row=1; row <= 15000; row++)
{
/*** BEGIN Comment out this section to add the large table
into the pdf document at one time ***/
if (row % FRAGMENT_SIZE == FRAGMENT_SIZE-1 )
{
document.add(table);
table.deleteBodyRows();
table.setSkipFirstHeader(true);
}
/*** END Comment out this section to add the large table into
the pdf document at one time ***/
makeNewRow(table, row, font);
}
document.add(table);
document.close();
} catch (DocumentException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
private static void makeNewRow(PdfPTable table, int row, Font font)
{
PdfPCell cell;
cell = new PdfPCell(new Paragraph(String.valueOf(row), font));
table.addCell(cell);
cell = new PdfPCell(new Paragraph(String.valueOf(row), font));
table.addCell(cell);
cell = new PdfPCell(new Paragraph(String.valueOf(row), font));
table.addCell(cell);
cell = new PdfPCell(new Paragraph(String.valueOf(row), font));
table.addCell(cell);
cell = new PdfPCell(new Paragraph("Lorem ipsum dolor sit amet,
consectetuer adipiscing elit. Nulla mauris nibh, ultricies nec,
adipiscing eget.", font))
;
table.addCell(cell);
}
}
-----Original Message-----
From: Steve Appling [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 05, 2005 6:50 AM
To: Liao, Shangshin; itext-questions@lists.sourceforge.net
Subject: Re: [iText-questions] Performance Issue on Document.add()
function
Well - try not to make the table so big :)
Seriously, you can get the exact same effect as a big table by using
multiple smaller tables with
the right options. See the example "ExampleLargeTable.java" in the
bundle examples-147.zip at
itextpdf.sf.net.
----- Original Message -----
From: "Liao, Shangshin" <[EMAIL PROTECTED]>
To: <itext-questions@lists.sourceforge.net>
Cc: "Liao, Shangshin" <[EMAIL PROTECTED]>
Sent: Tuesday, January 04, 2005 6:37 PM
Subject: [iText-questions] Performance Issue on Document.add() function
Hi,
The function in question takes at least 10 seconds if the size of
bigTable is more than 1 mega.( plz see sample code below)
com.lowagie.text.Document pdfDocument = new
com.lowagie.text.Document(PageSize.LETTER.rotate());
PdfPTable bigTable = new PdfPTable(10);
pdfDocument.add ( bigTable );
My computer has a 3G cpu and 1G memory.
I am wondering if there is a way for optimization.
Thanks
Shangshin Liao
[EMAIL PROTECTED]
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