Java连接数据库报错：com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

解决方案

连接Mysql报错

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

检查mysql服务是否开启

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原文地址：https://www.cnblogs.com/Fzeng/p/14773730.html