JFreeChart生成折线图的经典Demo实例

 

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Polygon;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.DefaultDrawingSupplier;
import org.jfree.chart.plot.DrawingSupplier;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**   
 * A line chart demo showing the use of a custom drawing supplier.   
 *   
 */
public class LineChartDemo5 extends ApplicationFrame
{

	/**   
	 * Creates a new demo.   
	 *   
	 * @param title the frame title.   
	 */
	public LineChartDemo5(final String title)
	{
		super(title);
		final CategoryDataset dataset = createDataset();
		final JFreeChart chart = createChart(dataset);
		final ChartPanel chartPanel = new ChartPanel(chart);
		chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
		setContentPane(chartPanel);

	}

	/**   
	 * Creates a sample dataset.   
	 *   
	 * @return a sample dataset.   
	 */
	private CategoryDataset createDataset()
	{

		// row keys...    
		final String series1 = "First";
		final String series2 = "Second";
		final String series3 = "Third";

		// column keys...    
		final String type1 = "Type 1";
		final String type2 = "Type 2";
		final String type3 = "Type 3";
		final String type4 = "Type 4";
		final String type5 = "Type 5";
		final String type6 = "Type 6";
		final String type7 = "Type 7";
		final String type8 = "Type 8";

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

		dataset.addValue(1.0, series1, type1);
		dataset.addValue(4.0, series1, type2);
		dataset.addValue(3.0, series1, type3);
		dataset.addValue(5.0, series1, type4);
		dataset.addValue(5.0, series1, type5);
		dataset.addValue(7.0, series1, type6);
		dataset.addValue(7.0, series1, type7);
		dataset.addValue(8.0, series1, type8);

		dataset.addValue(5.0, series2, type1);
		dataset.addValue(7.0, series2, type2);
		dataset.addValue(6.0, series2, type3);
		dataset.addValue(8.0, series2, type4);
		dataset.addValue(4.0, series2, type5);
		dataset.addValue(4.0, series2, type6);
		dataset.addValue(2.0, series2, type7);
		dataset.addValue(1.0, series2, type8);

		dataset.addValue(4.0, series3, type1);
		dataset.addValue(3.0, series3, type2);
		dataset.addValue(2.0, series3, type3);
		dataset.addValue(3.0, series3, type4);
		dataset.addValue(6.0, series3, type5);
		dataset.addValue(3.0, series3, type6);
		dataset.addValue(4.0, series3, type7);
		dataset.addValue(3.0, series3, type8);

		return dataset;

	}

	/**   
	 * Creates a sample chart.   
	 *   
	 * @param dataset the dataset.   
	 *   
	 * @return a chart.   
	 */
	private JFreeChart createChart(final CategoryDataset dataset)
	{

		final JFreeChart chart = ChartFactory.createLineChart(
				"Line Chart Demo 5", // chart title    
				"Type", // domain axis label    
				"Value", // range axis label    
				dataset, // data    
				PlotOrientation.VERTICAL, // orientation    
				true, // include legend    
				true, // tooltips    
				false // urls    
				);

		// final StandardLegend legend = (StandardLegend) chart.getLegend();    
		// legend.setDisplaySeriesShapes(true);    

		final Shape[] shapes = new Shape[3];
		int[] xpoints;
		int[] ypoints;

		// right-pointing triangle    
		xpoints = new int[] { -3, 3, -3 };
		ypoints = new int[] { -3, 0, 3 };
		shapes[0] = new Polygon(xpoints, ypoints, 3);

		// vertical rectangle    
		shapes[1] = new Rectangle2D.Double(-2, -3, 3, 6);

		// left-pointing triangle    
		xpoints = new int[] { -3, 3, 3 };
		ypoints = new int[] { 0, -3, 3 };
		shapes[2] = new Polygon(xpoints, ypoints, 3);

		final DrawingSupplier supplier = new DefaultDrawingSupplier(
				DefaultDrawingSupplier.DEFAULT_PAINT_SEQUENCE,
				DefaultDrawingSupplier.DEFAULT_OUTLINE_PAINT_SEQUENCE,
				DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE,
				DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE, shapes);
		final CategoryPlot plot = chart.getCategoryPlot();
		plot.setDrawingSupplier(supplier);

		chart.setBackgroundPaint(Color.green);

		// set the stroke for each series...    
		plot.getRenderer().setSeriesStroke(
				0,
				new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
						BasicStroke.JOIN_ROUND, 1.0f,
						new float[] { 10.0f, 6.0f }, 0.0f));
		plot.getRenderer().setSeriesStroke(
				1,
				new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
						BasicStroke.JOIN_ROUND, 1.0f,
						new float[] { 6.0f, 6.0f }, 0.0f));
		plot.getRenderer().setSeriesStroke(
				2,
				new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
						BasicStroke.JOIN_ROUND, 1.0f,
						new float[] { 2.0f, 6.0f }, 0.0f));

		// customise the renderer...    
		final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot
				.getRenderer();
		// renderer.setDrawShapes(true);    
		renderer.setItemLabelsVisible(true);
		// renderer.setLabelGenerator(new StandardCategoryLabelGenerator());    

		// customise the range axis...    
		final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setAutoRangeIncludesZero(false);
		rangeAxis.setUpperMargin(0.12);

		return chart;

	}

	// ****************************************************************************    
	// * JFREECHART DEVELOPER GUIDE *    
	// * The JFreeChart Developer Guide, written by David Gilbert, is available *    
	// * to purchase from Object Refinery Limited: *    
	// * *    
	// * http://www.object-refinery.com/jfreechart/guide.html *    
	// * *    
	// * Sales are used to provide funding for the JFreeChart project - please *    
	// * support us so that we can continue developing free software. *    
	// ****************************************************************************    

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

		final LineChartDemo5 demo = new LineChartDemo5("Line Chart Demo 5");
		demo.pack();
		RefineryUtilities.centerFrameOnScreen(demo);
		demo.setVisible(true);

	}

}