报错信息：
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.Reason: Failed to determine a suitable driver classAction: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).
配置信息：
#mysql配置
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root
#可以不配置，spring boot 会尽可能的判断数据库类型，然后默认配置驱动类
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver依赖：
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope>
</dependency>
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency><groupId>org.apache.commons</groupId><artifactId>commons-dbcp2</artifactId>
</dependency>原因：找不到原因。
数据库是真实存在，并且能连上的。没有办法，我从新建了一个项目然后用相同的配置就可以起来了。头疼，有哪位大神知道原因的麻烦告诉我，感激不尽。