java.sql.SQLException：找不到适用于jdbc：mysql：// lo?mysql

我有这个Java程序： MySQLConnectExample.java

import java.sql.*; import java.util.Properties;

public class MySQLConnectExample { public static void main(String[] args) { Connection conn1 = null; Connection conn2 = null; Connection conn3 = null;

    try {
        String url1 = "jdbc:mysql://localhost:3306/aavikme";
        String user = "root";
        String password = "aa";

        conn1 = DriverManager.getConnection(url1, user, password);
        if (conn1 != null)
            System.out.println("Connected to the database test1");

        String url2 = "jdbc:mysql://localhost:3306/aavikme?user=root&password=aa";
        conn2 = DriverManager.getConnection(url2);
        if (conn2 != null) {
            System.out.println("Connected to the database test2");
        }

        String url3 = "jdbc:mysql://localhost:3306/aavikme";
        Properties info = new Properties();
        info.put("user", "root");
        info.put("password", "aa");

        conn3 = DriverManager.getConnection(url3, info);
        if (conn3 != null) {
            System.out.println("Connected to the database test3");
        }
    } catch (SQLException ex) {
        System.out.println("An error occurred. Maybe user/password is invalid");
        ex.printStackTrace();
    }
}

} 我这样编译它：

E:\java mysql code driver>javac MySQLConnectExample.java

E:\java mysql code driver>java -cp mysql-connector-java-3.0.11-stable-bin.jar;. MySQLConnectExample 我收到此错误：

An error occurred. Maybe user/password is invalid java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/ aavikme at java.sql.DriverManager.getConnection(DriverManager.java:596) at java.sql.DriverManager.getConnection(DriverManager.java:215) at MySQLConnectExample.main(MySQLConnectExample.java:20) 我究竟做错了什么？