spring: datasource: url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true&serverTimezone=Hongkong&allowPublicKeyRetrieval=true username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver hikari: connection-test-query: SELECT 1 FROM DUAL connection-timeout: 30000 maximum-pool-size: 20 max-lifetime: 1800000 minimum-idle: 5