java 链接 mysql 出错，无法找到驱动器..... 400 请求报错 

代码如下：

package test; import java.sql.*; public class ConnMysql { public static void main(String[] args) { String driver="com.mysql.jdbc.Driver"; String url="jdbc:MySQL://127.0.0.1:3306/test"; String user="root"; String password=""; try{ Class.forName(driver); Connection conn=DriverManager.getConnection(url,user,password); if(!conn.isClosed()) System.out.println("Succeeded connecting to the Database");

    Statement statemnet=conn.createStatement();
   
    String sql="select * form city";
    ResultSet result=statemnet.executeQuery(sql);
   
    String cityname=null;
    while(result.next())
    {
        cityname=result.getString("c_name");
        cityname=new String(cityname.getBytes("ISO-8859-1"),"GB3212");
        System.out.println(result.getString("c_id")+"\t"+cityname);
    }
    result.close();
    conn.close();
    }catch(ClassNotFoundException e)
    {
        System.out.println("Sorry,can't find the Driver");
        e.printStackTrace();
    }catch(SQLException e){
        e.printStackTrace();
    }catch(Exception e){
        e.printStackTrace();
    }
}

}