SpirngBoot 错误(1)

对于出现该错:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-11-18 17:20:06.572 ERROR 23284 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :

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APPLICATION FAILED TO START

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Description:
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).

进程已结束，退出代码为 1

一般是引入了对数据库的配置依赖项，如我引入了mybatis,但没有在配置文件中设置数据源等配置，重新加上常用配置即可:

# 数据库驱动：
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# 数据源名称
spring.datasource.name=defaultDataSource
# 数据库连接地址
spring.datasource.url=jdbc:mysql://localhost:3306/blue?serverTimezone=UTC
# 数据库用户名&密码：
spring.datasource.username=root
spring.datasource.password=root