问题

使用Idea自带的Database工具连接MySQL数据库出错：Connection to aplanmis@localhost failed.
[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.

原因

系统默认的时区与IDEA连接数据库的时区 (MySQL默认时区为UTC) 不一致，
按照格林威治的时间，中国属于东八区时间，领先UTC八个小时，所以说存在8小时的时差。

解决

在URL后面加上 ?serverTimezone=GMT 即可

其它解决办法

上面的解决办法每次连接url都得加上?serverTimezone=GMT，不太方便，这里还查到了一些其它的解决办法，一并列出。

命令行设置time_zone
在mysql的命令模式下，输入：

set global time_zone='+8:00'

配置文件设置time_zone
修改配置文件，在[mysqld]下添加或修改一行：

default-time-zone='+08:00'

重启数据库。

Idea Database管理工具中，修改 Advanced 中 serverTimezone 的属性值为 Asia/Shanghai

参考：

【1】：连接数据库出错：Connection to student@localhost failed. [08001] Could not create connection to database…
【2】：IDEA连接MySQL8.0数据库时，报错[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.

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Idea 连接数据库出错Connection to xxx@localhost failed. [08001] Could not create connection to database

问题

原因

解决

其它解决办法

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