JDBC +mysql+java

Bonjour, j'arrive pas a faire la connection avec ma base de donnee et j'ai une reponse comme ceci
run:
7 août 2012 12:01:55 JCalendar$2 actionPerformed
GRAVE: null
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at JCalendar$2.actionPerformed(JCalendar.java:110)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6290)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6055)
at java.awt.Container.processEvent(Container.java:2039)
at java.awt.Component.dispatchEventImpl(Component.java:4653)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
at java.awt.Container.dispatchEventImpl(Container.java:2083)
at java.awt.Window.dispatchEventImpl(Window.java:2482)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:607)
at java.awt.EventQueue$1.run(EventQueue.java:605)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:621)
at java.awt.EventQueue$2.run(EventQueue.java:619)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
7 août 2012 12:01:55 JCalendar$2 actionPerformed
GRAVE: null
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/med_consul
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at JCalendar$2.actionPerformed(JCalendar.java:116)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6290)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6055)
at java.awt.Container.processEvent(Container.java:2039)
at java.awt.Component.dispatchEventImpl(Component.java:4653)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
at java.awt.Container.dispatchEventImpl(Container.java:2083)
at java.awt.Window.dispatchEventImpl(Window.java:2482)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:607)
at java.awt.EventQueue$1.run(EventQueue.java:605)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:621)
at java.awt.EventQueue$2.run(EventQueue.java:619)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at JCalendar$2.actionPerformed(JCalendar.java:124)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6290)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6055)
at java.awt.Container.processEvent(Container.java:2039)
at java.awt.Component.dispatchEventImpl(Component.java:4653)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
at java.awt.Container.dispatchEventImpl(Container.java:2083)
at java.awt.Window.dispatchEventImpl(Window.java:2482)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:607)
at java.awt.EventQueue$1.run(EventQueue.java:605)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:621)
at java.awt.EventQueue$2.run(EventQueue.java:619)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
BUILD SUCCESSFUL (total time: 9 seconds)


Voici mon code java :

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormatSymbols;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;


public class JCalendar extends JPanel {


private Locale _locale = getDefaultLocale();

private GregorianCalendar _calendar = new GregorianCalendar();

private DateFormatSymbols _dateSymbols = new DateFormatSymbols();

private SimpleDateFormat _formatMY = new SimpleDateFormat("MMMM yyyy");

private int _firstDayOfWeek = _calendar.getFirstDayOfWeek();

private final JLabel _monthYear = new JLabel("", SwingUtilities.CENTER);

private final JLabel[] _daysOfWeek = new JLabel[7];

private final JButton[] _daysNumber = new JButton[42];

private final ActionListener _changeMonth = new ActionListener() {

public void actionPerformed(final ActionEvent ae) {

final int nb = "next".equals(ae.getActionCommand()) ? 1: -1;
_calendar.add(Calendar.MONTH, nb);
updateMonthYear();
updateDaysNumber();
}
};

public JCalendar() {
setLayout(new BorderLayout());
// Month Panel
final JPanel monthPanel = new JPanel();
final JButton previous = new JButton("<<");
previous.addActionListener(_changeMonth);
final JButton next = new JButton(">>");
next.addActionListener(_changeMonth);
next.setActionCommand("next");
_monthYear.setPreferredSize(new Dimension(320, 120));
monthPanel.add(previous);
monthPanel.add(_monthYear);
monthPanel.add(next);
add(monthPanel, BorderLayout.NORTH);



// Day Panel

final JPanel dayPanel = new JPanel();

dayPanel.setLayout(new GridLayout(7, 7));
for (int i = 0; i < 7; ++i)
dayPanel.add(_daysOfWeek[i] = new JLabel(" ", SwingUtilities.CENTER));
for (int i=0; i<_daysNumber.length; ++i)
{

//fenetre de confirmation du jour

_daysNumber[i] = new JButton();
_daysNumber[i].addActionListener(new ActionListener()
{


@Override
public void actionPerformed(ActionEvent e)
{

Connection con = null;
String DB="med_consul"; // base de données
String Data = null;
Statement st=null; // objet d'émission des requêtes
ResultSet rs=null; // table résultat d'une requête
String[] jm = {"Matin", "Soir"};

JOptionPane jop = new JOptionPane(), jop2 = new JOptionPane();

String nom = (String)jop.showInputDialog(null,"Choisissez un creneau pour " ,"RDV ",JOptionPane.QUESTION_MESSAGE,
null,jm,jm[0]);
if ((nom.equals("Matin"))||(nom.equals("Soir")))
{

jop2.showMessageDialog(null, "Votre disponibilite est le " + nom, "RDVvali", JOptionPane.INFORMATION_MESSAGE);

try {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException ex) {

Logger.getLogger(JCalendar.class.getName()).log(Level.SEVERE, null, ex);
}

con=DriverManager.getConnection("jdbc:mysql://localhost:3306/med_consul");

} catch (SQLException ex) {

Logger.getLogger(JCalendar.class.getName()).log(Level.SEVERE, null, ex);
}
try {
// création d'un objet Statement
st=con.createStatement();
// exécution d'une requête select
} catch (SQLException ex) {
Logger.getLogger(JCalendar.class.getName()).log(Level.SEVERE, null, ex);
}
Data = "INSERT INTO rdv('RDV','JourduMarche','Disponibilite') VALUES(NULL," +nom +"'3')";
try {
rs=st.executeQuery(Data);

} catch (SQLException ex) {
Logger.getLogger(JCalendar.class.getName()).log(Level.SEVERE, null, ex);
}
try {
con.close();
} catch (SQLException ex) {
Logger.getLogger(JCalendar.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println("Base " + DB + " fermée");

}
}

});
dayPanel.add(_daysNumber[i]);
}


add(dayPanel, BorderLayout.CENTER);

// Remplissage des composants
updateMonthYear();
updateDaysOfWeek();
updateDaysNumber();
}

// Réactualise la locale et réaffiche le contenu des composants
private void updateLocale(final Locale locale) {
_locale = locale;
final Date tmp = _calendar.getTime();
_calendar = new GregorianCalendar(_locale);
_calendar.setTime(tmp);
_firstDayOfWeek = _calendar.getFirstDayOfWeek();
_dateSymbols = new DateFormatSymbols(_locale);
_formatMY = new SimpleDateFormat("MMMM yyyy", _locale);
updateMonthYear();
updateDaysOfWeek();
updateDaysNumber();
}

// Affiche le mois et l'année en cours
private void updateMonthYear() {
_monthYear.setText(_formatMY.format(_calendar.getTime()));
}

// Affiche les jours de la semaine
private void updateDaysOfWeek() {
final String[] weekDays = _dateSymbols.getShortWeekdays();
for (int i = 1; i < weekDays.length; ++i) {
final int index = (i - 2 + _firstDayOfWeek) % 7 + 1;
_daysOfWeek[i - 1].setText(weekDays[index]);
}
}

// Affiche le numéro des jours
private void updateDaysNumber() {
//apparition des marches dans le mois
String var ="";
int M1 = 2;
int M2 = 3;
int M3 = 4;
int M4 = 6;

final Date tmp = _calendar.getTime();
_calendar.set(Calendar.DAY_OF_MONTH, 1);
final int firstDay = _calendar.get(Calendar.DAY_OF_WEEK);
final int LocalFirstDay = (firstDay - _firstDayOfWeek + 7) % 7 + 1;
boolean full = false;
for (int i = 0; i < _daysNumber.length; ++i) {
//Détermine si le composant est affiché ou non
final boolean isNotEmpty = i < LocalFirstDay - 1 || full;
_daysNumber[i].setVisible(!isNotEmpty);

// Affichage du jour
if (!isNotEmpty) {
final int dayOfMonth = _calendar.get(Calendar.DAY_OF_MONTH);
//apparitions et frequences des marches

if (dayOfMonth == M1)
{
var = var +"A";
M1 +=3;
}
if (dayOfMonth == M2)
{
var = var +"B";
M2 +=4;
}
if (dayOfMonth == M3)
{
var = var + "C";
M3 +=5;
}
if (dayOfMonth == M4)
{
var = var + "D";
M4 +=7;//frequences ....
}

_daysNumber[i].setText(String.valueOf(dayOfMonth)+var);
var = "";//retourne vide apres chaque execution

_calendar.add(Calendar.DAY_OF_MONTH, 1);
full = 1 == _calendar.get(Calendar.DAY_OF_MONTH);

}

}
_calendar.setTime(tmp);
}



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


SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame("Prog Doc ");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new JCalendar());
frame.pack();
frame.setVisible(true);

}
});
}


}

je veux juste enregistere dans ma base mysql RDV ,Jour du marche et disponibilite
j'ai besoin d'aide je palnche dessus depuis 3 semaines
merci d'avance