Establishing SSL 真connection without server’s identity verification is not recommended.
According to MySQL的 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be
报错记录投诉抄袭，什么时候能智能一点呢，只是为了记录一下罢了
established by default 绝if explicit option isn’t set.
For compliance with existing applications not using SSL the verifyServerCertificate
property is set to ‘false’.
You need either to explicitly了 disable SSL by setting useSSL=false,
or set useSSL=true and provide truststore for server certificate verification.

按提示说 setting useSSL=false。