springboot数据库配置后接参数含义

1. useUnicode=true&characterEncoding=utf8

https://blog.csdn.net/qq_30757161/article/details/95633213

2. zeroDateTimeBehavior=convertToNull

https://blog.csdn.net/sinat_30397435/article/details/72518215

3. useSSL=true

https://blog.csdn.net/qq_51515673/article/details/124112428

http://www.lwcjw.com/post/34490.html

4. serverTimezone=GMT%2B8

https://blog.csdn.net/it_sunwz/article/details/129142096
本地安装使用MySQL的时候默认走本地的时间，而连接默认使用UTC, 所以产生了时差, 导致数据库连接不成功。