springboot 2.0 数据库连接配置

问题：启动项目是发现没有连接配置文件制定的数据库

springboot 2.0 中默认连接池是Hikari，因为配置信息不完整造成的。

解决方法：添加如下配置

# jdbc_config   datasource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false&maxReconnects=15000
#spring.datasource.username=root
#spring.datasource.password=123456

# Hikari will use the above plus the following to setup connection pooling
spring.datasource.type=com.zaxxer.hikari.HikariDataSource
spring.datasource.hikari.minimum-idle=10
spring.datasource.hikari.maximum-pool-size=25
spring.datasource.hikari.auto-commit=true
spring.datasource.hikari.idle-timeout=30000
spring.datasource.hikari.pool-name=DatebookHikariCP
spring.datasource.hikari.max-lifetime=1800000
spring.datasource.hikari.connection-timeout=30000
spring.datasource.hikari.connection-test-query=SELECT 1