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

  com.mysql.jdbc.Driver的前身是org.gjt.mm.mysql.Driver,现在主要用com.mysql.jdbc.Driver,但为了保持兼容性保留了org.gjt.mm.mysql.Driver这个路径的引用。

 

mysql-connector-java-5.1.40.jar包结构:

                               

 

com.mysql.jdbc.Driver.java 代码:

复制代码
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 {
}

</span><span style="color: #0000ff;">static</span><span style="color: #000000;"> {
    </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> {
        DriverManager.registerDriver(</span><span style="color: #0000ff;">new</span><span style="color: #000000;"> Driver());
    } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (SQLException var1) {
        </span><span style="color: #0000ff;">throw</span> <span style="color: #0000ff;">new</span> RuntimeException("Can't register driver!"<span style="color: #000000;">);
    }
}

}

复制代码

 

org.gjt.mm.mysql.Driver.java 代码:

复制代码
package org.gjt.mm.mysql;

import java.sql.SQLException;

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

复制代码

可以总结出MySQL公司为了保持兼容性让org.gjt.mm.mysql.Driver对com.mysql.jdbc.Driver进行了简单的继承。

原文地址:https://www.cnblogs.com/JimKing/p/9032272.html

posted @ 2019-11-09 23:21  星朝  阅读(443)  评论(0编辑  收藏  举报