com.mysql.jdbc.Driver 与 org.gjt.mm.mysql.Driver的区别

package com.mysql.jdbc;

import java.sql.DriverManager;
import java.sql.SQLException;

public class Driver extends NonRegisteringDriver implements java.sql.Driver {
    public Driver() throws SQLException {
    }

    static {
        try {
            DriverManager.registerDriver(new Driver());
        } catch (SQLException var1) {
            throw new RuntimeException("Can‘t register driver!");
        }
    }
}

package org.gjt.mm.mysql;

import java.sql.SQLException;

public class Driver extends com.mysql.jdbc.Driver {
    public Driver() throws SQLException {
    }
}