jar包下载方式
官网地址：MySQL :: Download Connector/J，如果你打不开官网，在下面我为你准备了直接下载jar包的链接地址。
在选择操作系统时，此处选择platform independent（独立于平台）。
8.0版本的jar包下载地址，点击直接下载。
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.11.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.12.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.13.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.14.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.15.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.16.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.17.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.18.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.19.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.20.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.21.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.22.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.23.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.24.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.25.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.26.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.27.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.28.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.29.zip
5.0版本的jar包下载地址，点击直接下载。
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.47.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.48.zip
https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.49.zip
maven下载方式
在中央仓库服务maven依赖包的配置，中央仓库的地址：https://mvnrepository.com/artifact/mysql/mysql-connector-java
