1.springboot 2.0 默认连接池就是Hikari了，所以引用parents后不用专门加依赖

2.贴我自己的配置（时间单位都是毫秒）

# jdbc_config  datasourcespring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://127.0.0.1:3306/datebook?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNullspring.datasource.username=rootspring.datasource.password=root# Hikari will use the above plus the following to setup connection poolingspring.datasource.type=com.zaxxer.hikari.HikariDataSourcespring.datasource.hikari.minimum-idle=5spring.datasource.hikari.maximum-pool-size=15spring.datasource.hikari.auto-commit=truespring.datasource.hikari.idle-timeout=30000spring.datasource.hikari.pool-name=DatebookHikariCPspring.datasource.hikari.max-lifetime=1800000spring.datasource.hikari.connection-timeout=30000spring.datasource.hikari.connection-test-query=SELECT 1