📄 imagemapdemo4.java

📁 在软件开发中用来绘制各种图表的源码
💻 JAVA
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/* ------------------
 * ImageMapDemo4.java
 * ------------------
 * (C) Copyright 2002-2005, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Richard Atkinson;
 * 
 */

package demo;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis3D;
import org.jfree.chart.axis.NumberAxis3D;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.imagemap.ImageMapUtilities;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.chart.urls.StandardCategoryURLGenerator;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;

/**
 * A demo showing how to create an HTML image map for a 3D bar chart.
 */
public class ImageMapDemo4 {

    /**
     * Default constructor.
     */
    public ImageMapDemo4() {
        super();
    }

    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        // create a chart
        double[][] data = new double[][] {
            {56.0, -12.0, 34.0, 76.0, 56.0, 100.0, 67.0, 45.0},
            {37.0, 45.0, 67.0, 25.0, 34.0, 34.0, 100.0, 53.0},
            {43.0, 54.0, 34.0, 34.0, 87.0, 64.0, 73.0, 12.0}
        };
        CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
            "Series ", "Type ", data
        );

        JFreeChart chart = null;
        boolean drilldown = true;

        if (drilldown) {
            CategoryAxis3D categoryAxis = new CategoryAxis3D("Category");
            ValueAxis valueAxis = new NumberAxis3D("Value");
            BarRenderer3D renderer = new BarRenderer3D();
            renderer.setToolTipGenerator(new StandardCategoryToolTipGenerator());
            renderer.setItemURLGenerator(new StandardCategoryURLGenerator("bar_chart_detail.jsp"));
            CategoryPlot plot = new CategoryPlot(dataset, categoryAxis, valueAxis, renderer);
            plot.setOrientation(PlotOrientation.VERTICAL);
            chart = new JFreeChart("Bar Chart", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
        }
        else {
            chart = ChartFactory.createBarChart3D(
                "Bar Chart",           // chart title
                "Category",            // domain axis label
                "Value",               // range axis label
                dataset,               // data
                PlotOrientation.VERTICAL,
                true,                  // include legend
                true,
                false
            );
        }
        chart.setBackgroundPaint(java.awt.Color.white);

        // save it to an image
        try {
            ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
            File file1 = new File("barchart101.png");
            ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);

            // write an HTML page incorporating the image with an image map
            File file2 = new File("barchart101.html");
            OutputStream out = new BufferedOutputStream(new FileOutputStream(file2));
            PrintWriter writer = new PrintWriter(out);
            writer.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"");
            writer.println("\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">");
            writer.println("<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" xml:lang=\"en\">");
            writer.println("<head><title>JFreeChart Image Map Demo</title></head>");
            writer.println("<body><p>");
            ImageMapUtilities.writeImageMap(writer, "chart", info);
            writer.println("<img src=\"barchart101.png\" "
                           + "width=\"600\" height=\"400\" usemap=\"#chart\" alt=\"barchart101.png\"/>");
            writer.println("</p></body>");
            writer.println("</html>");
            writer.close();

        }
        catch (IOException e) {
            System.out.println(e.toString());
        }

    }

}
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