📄 imagemapdemo1.java

📁 在软件开发中用来绘制各种图表的源码
💻 JAVA
字号:
/* ------------------
 * ImageMapDemo1.java
 * ------------------
 * (C) Copyright 2002-2005, by Object Refinery Limited and 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.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
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.BarRenderer;
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 bar chart.
 */
public class ImageMapDemo1 {

    /**
     * Default constructor.
     */
    public ImageMapDemo1() {
        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) {
            CategoryAxis categoryAxis = new CategoryAxis("Category");
            ValueAxis valueAxis = new NumberAxis("Value");
            BarRenderer renderer = new BarRenderer();
            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.createBarChart(
                "Vertical 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("barchart100.png");
            ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);

            // write an HTML page incorporating the image with an image map
            File file2 = new File("barchart100.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=\"barchart100.png\" "
                           + "width=\"600\" height=\"400\" usemap=\"#chart\" alt=\"barchart100.png\"/>");
            writer.println("</p></body>");
            writer.println("</html>");
            writer.close();

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

    }

}
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -