Java.lang.classnotfoundException: com.mysql.jdbc.driver mysqlconnector/j [Duplicate] ⇐ Java

[Anonymous]

Was ist los mit dem Code, es gibt viel Fehler beim Debuggen. Ich schreibe einen Code für eine Singleton -Klasse, um eine Verbindung mit der Datenbank MySQL zu erreichen. < /P>
Hier ist mein Code < /p>
package com.glomindz.mercuri.util;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;

public class MySingleTon {
String url = "jdbc:mysql://localhost:3306/";
String dbName = "test";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "";

private static MySingleTon myObj;
private Connection Con ;
private MySingleTon() {
System.out.println("Hello");
Con= createConnection();
}

@SuppressWarnings("rawtypes")
public Connection createConnection() {
Connection connection = null;
try {
// Load the JDBC driver
Class driver_class = Class.forName(driver);
Driver driver = (Driver) driver_class.newInstance();
DriverManager.registerDriver(driver);
connection = DriverManager.getConnection(url + dbName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
}
return connection;
}

/**
* Create a static method to get instance.
*/
public static MySingleTon getInstance() {
if (myObj == null) {
myObj = new MySingleTon();
}
return myObj;
}

public static void main(String a[]) {
MySingleTon st = MySingleTon.getInstance();
}
}
< /code>
Ich bin neu in Java. Bitte helfen Sie.