Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: 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).
这是因为工程没有配置数据库。
解决方法：
配置H2数据库或者MySQL数据库，其中配置MySQL解决方法如下：
1、添加 MySQL连接驱动的依赖
Maven工程在pom.xml中添加
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>
gradle工程在build.gradle中添加
implementation 'mysql:mysql-connector-java'
2、在application.properties中添加MySQL数据库配置
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/blog?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC spring.datasource.username=用户名 spring.datasource.password=密码
也可能是你在pom中使用了连接池，但是你没有进行数据库配置
