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| package date;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Date;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
//import org.jfree.data.time.Hour;
import org.jfree.data.time.Minute;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A demo showing a time series with per minute data.
*
*/
public class MinuteTest extends ApplicationFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* A demonstration application.
*
* @param title the frame title.
* @throws SQLException
*/
public MinuteTest(final String title) throws SQLException {
super(title);
String url = "jdbc:mysql://localhost:3306/test";
String username = "root";
String password = null ;
try{
Class.forName("com.mysql.jdbc.Driver");
}
catch (ClassNotFoundException e){
System.out.println("Pilote non retrouvé");
}
Statement stmt = null;
try {
Connection con = DriverManager.getConnection(url,username,password);
stmt = con.createStatement();
}
catch (SQLException sqle){System.out.println("Erreur de requete");}
//ResultSet rs = (ResultSet) stmt.executeQuery("select * from CPU");
final TimeSeries series = new TimeSeries("Per Minute Data", Minute.class);
try {
Connection con = DriverManager.getConnection(url,username,password);
stmt = con.createStatement();
}
catch (SQLException sqle){System.out.println("Erreur de requete");}
ResultSet rs = (ResultSet) stmt.executeQuery("select * from cpu");
//final Hour hour = new Hour();
while(rs.next()){
Date v1=rs.getDate("datex");
double v2=rs.getDouble("value1");
series.add(new Minute(v1), v2);
//series.add(new Minute(3, hour), 17.3);
//series.add(new Minute(9, hour), 14.6);
//series.add(new Minute(11, hour), 11.9);
//series.add(new Minute(15, hour), 13.5);
//series.add(new Minute(19, hour), 10.9);
}
rs.close();
final TimeSeriesCollection dataset = new TimeSeriesCollection(series);
final JFreeChart chart = ChartFactory.createTimeSeriesChart(
"Time Series Demo 10",
"Time",
"Value",
dataset,
true,
true,
false
);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(600, 300));
setContentPane(chartPanel);
}
public static void main(final String[] args) throws SQLException {
final MinuteTest demo = new MinuteTest("Time Series Demo 10");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
} |
[JFreeChart] afficher un graphe dans une page jsp
.
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, on dirait qu'il récupére pas les données stocké ds ma table : 
, et rien ds l'Axe des X. au niveau d'Eclipse, je trouve pas d'erreur .
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