mysql驱动参数变化

在java平台使用的mysql jdbc驱动为：mysql-connector-java。
在项目中添加如下依赖：

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${version.mysql.connector}</version>
</dependency>

在6.0.2版本之前

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://host:port/dbname?characterEncoding=utf8

在6.0.2版本之后

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://host:port/dbname?characterEncoding=utf8&serverTimezone=UTC

mysql-connector-java参数变化

1.从6.0.2版本开始，驱动类不再是com.mysql.jdbc.Driver，需要配置为：com.mysql.cj.jdbc.Driver。
否则，在启动时会提示警告日志：

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.

2.从6.0.2版本开始，如果mysql server未明确配置时区，则必须在jdbc连接参数中设置serverTimezone。
否则，在启动时报错：

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.sql.SQLException: The server time zone value '�й���׼ʱ��' 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.