帆软版本： 10.0.12

已尝试替换更新驱动包：mysql-connector-java-5.1.49-bin.jar ， 但报错依旧， 报错信息如下：

2021-08-23 18:04:43

严重:18:04:43 TestConnection-45-worker-1 ERROR [standard] 错误代码:31300012 创建数据连接失败: Communications link failure

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

2021-08-23 18:04:43

严重:18:04:43 TestConnection-45-worker-1 ERROR [standard] 错误代码：11300009 数据库连接失败: Communications link failure

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

2021-08-23 18:04:43

严重:18:04:43 SwingWorker-pool-7-thread-2 ERROR [standard] com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

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