Caused by: java.net.ConnectException: Connection timed out: connect

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spring boot项目整合mybatis时连接数据库报错

Caused by: java.net.ConnectException: Connection timed out: connect

我的是因为linux上的防火墙及3306端口没开放

参考：

https://blog.csdn.net/qq_40369944/article/details/85007397