一、Hibernate常用数据库简单配置

1、Mysql数据库配置

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL57Dialect
spring.datasource.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/dbname?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false&serverTimezone=CTT
spring.datasource.username = username
spring.datasource.password = password

2、SQLServer数据库配置

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.SQLServer2012Dialect
spring.datasource.driver-class-name = com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.datasource.url = jdbc:sqlserver://localhost:1433;DatabaseName=dbname
spring.datasource.username = username
spring.datasource.password = password

3、Oracle数据库配置

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.Oracle10gDialect
spring.datasource.driver-class-name = oracle.jdbc.driver.OracleDriver
spring.datasource.url = jdbc:oracle:thin:@localhost:1521:dbname
spring.datasource.username = username
spring.datasource.password = password

二、配置项说明（以Mysql为例）

spring.datasource.url = jdbc:mysql://localhost:3306/dbname?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false&serverTimezone=CTT
spring.datasource.username = username
spring.datasource.password = password
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL57Dialect
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

1、spring.jpa.hibernate.ddl-auto，根据实体类自动生成数据库表和字段，一般选用update

create-----启动时删数据库中的表，然后创建，退出时不删除数据表 
create-drop-----启动时删数据库中的表，然后创建，退出时删除数据表 如果表不存在报错 
update-----如果启动时表格式不一致则更新表，原有数据保留 
validate-----项目启动表结构进行校验 如果不一致则报错

2、spring.jpa.properties.hibernate.dialect，数据库方言，各数据库不同，可根据实际数据库版本调整，如mysql5.7

3、spring.jpa.hibernate.naming.physical-strategy，数据库命名策略

在hibernate5之后，采用implicit-strategy和physical-strategy分别控制命名策略，具体参考我的另一篇博文Hibernate数据库配置项中命名策略的简单说明

4、spring.datasource.driver-class-name，指定JDBC驱动程序