[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up IDEA2019的database插件无法链接mysql的解决办法（08001错误）

[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.

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IDEA2019的database插件无法链接mysql的解决办法（08001错误）