SpringBoot报错-Could not create connection to database server. Attempted reconnect 3 times. Giving up.

SpringBoot报错-Could not create connection to database server. Attempted reconnect 3 times. Giving up.

——墨问苍生

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无法连接数据库，一开始以为是yml的配置有问题，反复检查后发现是pom.xml文件的问题

箭头指着的版本号要改为和Mysql版本一样的