Could not create connection to database server. Attempted reconnect 3 times.

一、问题

Could not create connection to database server. Attempted reconnect 3 times.

二、问题分析

在Spring-boot项目中使用jdbc连接数据库时报错，依赖的mysql-connector-java版本为8.0.19，url连接为：

jdbc:mysql://localhost:3306/web_video?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true

查阅文档得知是未设置时区，添加：

&serverTimezone=UTC