SpringBoot启动报错Failed to determine a suitable driver class-蒲公英云

SpringBoot启动报错Failed to determine a suitable driver class

转自https://segmentfault.com/a/1190000019090635

新建的springboot工程启动报错，

2021-04-01 10:47:19.255 ERROR 3249 —- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :

***************************
APPLICATION FAILED TO START
***************************

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).

Process finished with exit code 0

原因是：

应用程序还有没有使用到DataSource，但是pom.xml中引入了

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>

或者 Mybatis相关的依赖。

这样的话，在springboot工程启动的时候回自动初始化DataSource相关的信息，但是却找不到，则会报错。

解决办法有两种：

一、在启动类的@SpringBootApplication加上

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class })

二、在application.properties里配置：

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration