idea连接MySQL5.7报错(已经确认账号密码以及端口都没错的情况下):
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

解决方法:将Advanced中的useSSL修改为FALSE

再Test Connection,完美解决

去官网看了一下原因:MySQL5.7用的是旧版TLS,而新版idea废除了这些协议
