The driver has not received any packets from the server

解决方法：

jdbc的url添加参数：

jdbc.url=jdbc:mysql://localhost:3306/totosea?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false

在mysql的安装目录下找到my.ini中添加：将mysql回收空闲连接的时间变长，mysql默认回收时间是8小时

wait_timeout=31536000interactive_timeout=31536000

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