Diagramme in PDF mit Java

[auxiliumseeker]

Hallo,

Zur Zeit bin ich am versuchen, mit Java ein Diagramm zu erstellen :
Das habe ich dann mit JFreechart gemacht

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
 *
 * Project Info:  [url]http://www.jfree.org/jfreechart/index.html[/url]
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ------------------
 * BarChartDemo1.java
 * ------------------
 * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   ;
 *
 * Changes
 * -------
 * 09-Mar-2005 : Version 1 (DG);
 *
 */

package statistik;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.RefineryUtilities;

/**
 * A simple demonstration application showing how to create a bar chart.
 */
public class BarChartDemo1 extends JFrame {

    /**
     * Creates a new demo instance.
     *
     * @param title  the frame title.
     */
    public BarChartDemo1(String title) {
        super(title);
        CategoryDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
        ChartPanel chartPanel = new ChartPanel(chart, false);
        chartPanel.setPreferredSize(new Dimension(500, 270));
        setContentPane(chartPanel);
    }

    /**
     * Returns a sample dataset.
     * 
     * @return The dataset.
     */
    private static CategoryDataset createDataset() {
        
        // row keys...
        String series1 = "Ist";
        String series2 = "Soll";
      

        // column keys...
        String category1 = "";
        
      

        // create the dataset...
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(61.0, series1, category1);
        dataset.addValue(550.0, series2, category1);
       
        
        return dataset;
        
    }
    
    /**
     * Creates a sample chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return The chart.
     */
    private static JFreeChart createChart(CategoryDataset dataset) {
        
        // create the chart...
        JFreeChart chart = ChartFactory.createBarChart(
            "Wertevergleich",       // chart title
            "Ford Focus",               // domain axis label
            "Geschwindigkeit",                  // range axis label
            dataset,                  // data
            PlotOrientation.VERTICAL, // orientation
            true,                     // include legend
           false,                     // tooltips?
            false                     // URLs?
        );

        // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

        // set the background color for the chart...
        chart.setBackgroundPaint(Color.white);

        // get a reference to the plot for further customisation...
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinePaint(Color.white);
        plot.setDomainGridlinesVisible(true);
        plot.setRangeGridlinePaint(Color.white);

        // ******************************************************************
        //  More than 150 demo applications are included with the JFreeChart
        //  Developer Guide...for more information, see:
        //
        //  >   [url]http://www.object-refinery.com/jfreechart/guide.html[/url]
        //
        // ******************************************************************
        
        // set the range axis to display integers only...
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

        // disable bar outlines...
        BarRenderer renderer = (BarRenderer) plot.getRenderer();
     
        renderer.setDrawBarOutline(false);
        
        // set up gradient paints for series...
        GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue, 
                0.0f, 0.0f, new Color(0, 0, 64));
        GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green, 
                0.0f, 0.0f, new Color(0, 64, 0));
   
        renderer.setSeriesPaint(0, gp0);
        renderer.setSeriesPaint(1, gp1);
       

        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setCategoryLabelPositions(
                CategoryLabelPositions.createUpRotationLabelPositions(
                        Math.PI / 6.0));
        // OPTIONAL CUSTOMISATION COMPLETED.
        
        return chart;
        
    }
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {
        BarChartDemo1 demo = new BarChartDemo1("Bar Chart Demo 1");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }

}

Nun würde ich das gerne in eine PDF speichern.
Habe mich dafür etwas in IText eingelesen:
Dort habe ich gefunden, dass man Bilder in einer PDF speichern kann.

Wie kann ich aus dem Diagramm eine Bilddatei erzeugen?
Oder gibt es eine andere Möglichkeit direkt die PDF zu erzeugen?

 

[Gast]

Erstmal ein BufferedImage erzeugen.

JFreeChart chart = createChart(...);

BufferedImage bufferedImage = new BufferedImage(1000, 400,
				BufferedImage.TYPE_INT_ARGB);

Graphics2D g2d = bufferedImage.createGraphics();

chart.draw(g2d, new Rectangle(1000, 400));

Bilddatei erzeugen

ImageIO.write(bufferedImage, "png", new FileOutputStream(...));

oder iText direkt das bufferedImage übergeben(sollte auch gehen), hab gerade keine passende iText doku da.

 

[Landei]

...oder iText direkt das bufferedImage übergeben(sollte auch gehen)

Kann ich bestätigen, geht ohne Probleme.

 

[Guest]

danke für die hilfe,

habe das mit dem buffered image auf der itext seite gesehen