Consider the following: If you want an embedded database (H2, HSQL or Derby)

Consider the following: If you want an embedded database (H2, HSQL or Derby)

启功SpringBoot项目时报错，问题描述如下：

Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

原因：
在pom中引入了mybatis-spring-boot-starter 坐标，Spring boot默认会加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration类，DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean。因为工程中没有关于dataSource相关的配置信息，当spring创建dataSource bean因缺少相关的信息就会报错

解决方案：

1. 方案一：去掉 mybatis 的坐标依赖
2. 方案二：将启动类上的注解改为 @SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
3. 方案三：在 l 配置上数据库的连接信息