JFreeChart类生成折线图的Java源代码

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.yellow); 

// 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; 

} 

public static void main(final String[] args) { 

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

} 

}