Large tables

This is a code example of iText PDF, discover more.

31st May 2016
iText PDF

Example that shows how you can add a table little by little in order to keep the memory footprint low.

IncompleteTable.java
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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2019 iText Group NV
    Authors: iText Software.
 
    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
package com.itextpdf.samples.sandbox.tables;
 
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.property.UnitValue;
import com.itextpdf.samples.GenericTest;
import com.itextpdf.test.annotations.type.SampleTest;
 
import org.junit.experimental.categories.Category;
 
import java.io.File;
 
@Category(SampleTest.class)
public class IncompleteTable extends GenericTest {
    public static final String DEST = "./target/test/resources/sandbox/tables/incomplete_table.pdf";
 
    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new IncompleteTable().manipulatePdf(DEST);
    }
 
    @Override
    protected void manipulatePdf(String dest) throws Exception {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
        Document doc = new Document(pdfDoc);
 
        Table table = new Table(UnitValue.createPercentArray(5), true);
 
        for (int i = 0; i < 5; i++) {
            table.addHeaderCell(new Cell().setKeepTogether(true).add(new Paragraph("Header " + i)));
        }
 
        doc.add(table);
        for (int i = 0; i < 500; i++) {
            if (i % 5 == 0) {
                table.flush();
            }
            table.addCell(new Cell().setKeepTogether(true).add(new Paragraph("Test " + i).setMargins(0, 0, 0, 0)));
        }
 
        table.complete();
 
        doc.close();
    }
}

Click the following link to see the legacy example for iText 5. Except for security fixes, iText 5 is no longer being developed.



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