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package histogramme;
import java.applet.Applet;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
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.data.general.Dataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A simple demonstration application showing how to create a bar chart.
*/
public class chag_demo1 extends JFrame {
/**
* Creates a new demo instance.
*
* @param title the frame title.
*/
public chag_demo1 (String title) {
super(title);
CategoryDataset dataset = createDataset();
JFreeChart chart = createChart(dataset);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setFillZoomRectangle(true);
chartPanel.setMouseWheelEnabled(true);
chartPanel.setPreferredSize(new Dimension(500, 270));
setContentPane(chartPanel);
this.setDefaultCloseOperation (JFrame.DISPOSE_ON_CLOSE);
int width = 500;
int height = 300;
try {
ChartUtilities.saveChartAsPNG(new File("c://histogram.PNG"),chart , width, height);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Returns a sample dataset.
*
* @return The dataset.
*/
private static CategoryDataset createDataset() {
Dataset data = null;
URL servletURL = null;
URLConnection servletConnection = null;
ObjectInputStream dbStream = null;
try
{
servletURL = new URL( "http://localhost:8083/WebModule1/ser_con_emp" );
servletConnection = servletURL.openConnection();
dbStream = new ObjectInputStream( servletURL.openStream() );
try {
data = (Dataset) dbStream.readObject();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Objet lu");
}
catch( IOException eee )
{
}
int v=essai5.ref;
int v1=v;
int v2=10;
int v3=9;
int v4=2;
// row keys...
String series1 = "First";
// column keys...
String category1 = " 1 er ";
String category2 = "2eme ";
String category3 = "3 eme ";
String category4 = " 4 eme ";
// create the dataset...
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(v1, series1, category1);
dataset.addValue(v2, series1, category2);
dataset.addValue(v3, series1, category3);
dataset.addValue(v4, series1, category4);
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(
"Bar Chart ", // chart title
"trimestre", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // 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();
// ******************************************************************
// More than 150 demo applications are included with the JFreeChart
// Developer Guide...for more information, see:
//
// > <a href="http://www.object-refinery.com/jfreechart/guide.html" target="_blank">http://www.object-refinery.com/jfreechart/guide.html</a>
//
// ******************************************************************
// set the range axis to display integers only...
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));
renderer.setSeriesPaint(0, gp0);
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) {
chag_demo1 demo = new chag_demo1 ("Bar Chart ");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
} |
appel d'une classe à partir d'une servlet ou jsp
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