1.在test的built.bat中添加： 


libraryDependencies += jdbc
libraryDependencies += "mysql" % "mysql-connector-java" % "6.0.6"

2.在conf中application.conf中添加：

default.driver = com.mysql.cj.jdbc.Driver
default.url = "jdbc:mysql://localhost:3306/book?useSSL=false&serverTimezone=Asia/Hong_Kong"
default.username = root
default.password = ""

注释掉如下：

#default.driver = org.h2.Driver
#default.url = "jdbc:h2:mem:play"
#default.username = sa
#default.password = ""

3.打开数据库：

leiyuxingdeMacBook-Pro:~ leiyuxing$ mysql.server start
Starting MySQL
SUCCESS!