om.mysql.jdbc.Driver和com.mysql.cj.jdbc.Driver的区别是什么

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我是靠谱客的博主活泼微笑，这篇文章主要介绍om.mysql.jdbc.Driver和com.mysql.cj.jdbc.Driver的区别是什么，现在分享给大家，希望可以做个参考。

本篇文章给大家介绍一下om.mysql.jdbc.Driver和com.mysql.cj.jdbc.Driver的区别。有一定的参考价值，有需要的朋友可以参考一下，希望对大家有所帮助。

com.mysql.jdbc.Driver 是 mysql-connector-java 5中的，

com.mysql.cj.jdbc.Driver 是 mysql-connector-java 6中的

下载地址：https://dev.mysql.com/downloads/connector/j/5.1.html

在这里插入图片描述

仓库地址：https://mvnrepository.com/artifact/mysql/mysql-connector-java

在这里插入图片描述

mysql-connector-java 5

复制代码<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.49</version>
</dependency>1
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<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.49</version>
</dependency>
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1、JDBC连接Mysql5 com.mysql.jdbc.Driver:

复制代码driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=1
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driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=
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2、JDBC连接Mysql6 com.mysql.cj.jdbc.Driver，需要指定时区serverTimezone:

复制代码driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=1
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driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=
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在设定时区的时候，如果设定serverTimezone=UTC，会比中国时间早8个小时，如果在中国，可以选择Asia/Shanghai或者Asia/Hongkong，例如：

复制代码driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=1
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driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=
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备注：

I、如果mysql-connector-java用的6.0以上的，如下：

复制代码<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>6.0.6</version>
</dependency>1
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<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>6.0.6</version>
</dependency>
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但是你的driver用的还是com.mysql.jdbc.Driver，就会报错：

复制代码Loading class 'com.mysql.jdbc.Driver'. This is deprecated. The new 
driver class is 'com.mysql.cj.jdbc.Driver'. 
The driver is automatically registered via the SPI 
and manual loading of the driver class is generally unnecessary.1
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Loading class 'com.mysql.jdbc.Driver'. This is deprecated. The new 
driver class is 'com.mysql.cj.jdbc.Driver'. 
The driver is automatically registered via the SPI 
and manual loading of the driver class is generally unnecessary.
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此时需要把com.mysql.jdbc.Driver 改为com.mysql.cj.jdbc.Driver

II、还有一个警告：

复制代码WARN: Establishing SSL connection without server’s identity verification is not recommended. 
According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection 
must be established by default if explicit option isn’t set. 
For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false’. 
You need either to explicitly disable SSL by setting useSSL=false, 
or set useSSL=true and provide truststore for server certificate verification.1
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WARN: Establishing SSL connection without server’s identity verification is not recommended. 
According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection 
must be established by default if explicit option isn’t set. 
For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false’. 
You need either to explicitly disable SSL by setting useSSL=false, 
or set useSSL=true and provide truststore for server certificate verification.
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不推荐不使用服务器身份验证来建立SSL连接。

如果未明确设置，MySQL 5.5.45+, 5.6.26+ and 5.7.6+版本默认要求建立SSL连接。

为了符合当前不使用SSL连接的应用程序，verifyServerCertificate属性设置为’false’。

如果你不需要使用SSL连接，你需要通过设置useSSL=false来显式禁用SSL连接。

如果你需要用SSL连接，就要为服务器证书验证提供信任库，并设置useSSL=true。

SSL – Secure Sockets Layer（安全套接层）

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