当启动一个不连接数据库的springboot时，会报错

Cannot determine embedded database driver class for database type NONE  

是因为springboot在启动时，会扫描DataSource相关配置的包所以

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
public class SpringbootApplication {public static void main(String[] args) {SpringApplication.run(SpringbootApplication.class, args);}
}

在启动入口注解中加入

exclude = {DataSourceAutoConfiguration.class}

则可以正常启动