环境：

• Eclipse Java EE IDE for Web Developers. Version: Oxygen.3a Release (4.7.3a)
• mysql-connector-java-8.0.11
• MySQL Server 8.0

Loading class `com.mysql.jdbc.Driver’. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver’. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

驱动的类换了个名字

Class.forName("com.mysql.cj.jdbc.Driver");

Fri Jun 08 13:09:27 CST 2018 WARN: Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default 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 disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

加上useSSL=true或false 

参考地址

con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test?useSSL=true", "root", "123456");

java.sql.SQLException: The server time zone value ‘???ú±ê×??±??’ is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.

加上serverTimezone=GMT

参考地址

con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test?useSSL=true&serverTimezone=GMT", "root", "123456");