我找到了一种解决方法，尽管我不喜欢它，因为我不明白为什么在任何地方都没有提到它，以及为什么连接器的权限还不够吗?
谁能解释我?

I found a workaround, though I don't like it because I don't understand why it isn't mentioned anywhere, and why the permissions for the connector is not enough?
Can anyone explain me?

解决方法-将以下行添加到您的tomcat策略文件中:

The workaround - add these lines to your tomcat policy file:

grant {
        permission java.net.SocketPermission "localhost:3306", "connect, resolve";
};