MySQLNonTransientConnectionException: Could not create connection to database server.

Spring整合mybatis并使用driud数据库连接池，启动测试类就报”MySQLNonTransientConnectionException: Could not create connection to database server.“，检查了一番配置文件没发现问题，而且我之前用过这些配置，按理说没问题。各种百度、谷歌没结果，想起来装了mysql 8.0，估计是这个问题。既然是这个问题，那么问题出在数据库连接驱动，看了下pom文件，发现用的是5.1.4版本，于是找了个8.0.11版本重新启动，果然报错就不一样了。

2018-05-26 16:52:53,928 [Druid-ConnectionPool-Create-1150963491] [com.alibaba.druid.pool.DruidDataSource]-[ERROR] create connection error
java.sql.SQLException: validateConnection false

另外在控制台上还打印了”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.“，意思是这个驱动类已经过时了，那只能说明MySQL 8.0使用的数据库连接字符串不一样。改完后重新启动搞定。

需要说明的是mysql 8.0版本还对时区有要求，否则启动提示”The server time zone value 'Öйú±ê׼ʱ¼ä' 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.“

有个别人的示例可以参考下：https://blog.csdn.net/beyond9305/article/details/80330125

贴一下连接字符串

url: jdbc:mysql://localhost:3306/yinliu?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true

driver: com.mysql.cj.jdbc.Driver