[Débutant] [MySQL] Connexion refusée
Bonjour,
je cherche à me connecter à une base MySQL depuis un programme Java.
J'ai bien importé le pilote fourni par MySQL.
La classe devant théoriquement permettre la connexion est donnée ici :
Code:
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| import java.sql.*;
public class BdD {
public BdD(String base, String login, String password) {
this.base = base;
this.login = login;
this.password = password;
}
private String pilote = "com.mysql.jdbc.Driver";
private String base;
private String login;
private String password;
Connection connect() {
Connection conn = null;
try{
Class.forName(pilote);
conn = DriverManager.getConnection("jdbc:mysql://localhost/" + base,login,password);
System.out.println("Connexion : " + conn);
} catch (Exception ex)
{
System.out.println("Erreur MySQL - connect()");
ex.printStackTrace();
}
return conn;
}
ResultSet sendquery(Connection conn, String __query) {
ResultSet resultat = null;
try {
Statement instruction = conn.createStatement();
resultat = instruction.executeQuery(__query);
}
catch (SQLException ex) {
ex.printStackTrace();
}
return resultat;
}
} |
Je l'appelle ainsi :
Code:
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| BdD bdd = new BdD("mabase","monlogin","monmotdepasse");
Connection conn = bdd.connect(); |
Ça parait tout simple, et pourtant, ça ne fonctionne pas. J'obtiens l'erreur suivante :
Citation:
Erreur MySQL - connect()
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Last packet sent to the server was 0 ms ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:539)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2103)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:539)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
at java.sql.DriverManager.getConnection(DriverManager.java:620)
at java.sql.DriverManager.getConnection(DriverManager.java:200)
at parser.BdD.connect(BdD.java:28)
at parser.MyeDonkeyParser.main(MyeDonkeyParser.java:11)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:381)
at java.net.Socket.connect(Socket.java:568)
at java.net.Socket.connect(Socket.java:518)
at java.net.Socket.<init>(Socket.java:415)
at java.net.Socket.<init>(Socket.java:232)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2026)
... 13 more
D'où pourrait provenir le problème ?
Merci d'avance !
Alban
