在鏈接數據庫的時候，報錯如下：
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
上網查，一般是設置超時時間，我這邊設置超時時間是不管用的，敢肯定的是沒有設置mysql白名單或者網絡不通的問題。
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