### mysql database
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/educational?useSSL=false&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8
jdbc.username=root
jdbc.password=123456
### druid datasource
jdbc.initialSize=2
jdbc.maxActive=20