SpringBoot启动报错Failed to determine a suitable driver class怎么办

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SpringBoot启动报错如下

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-05-06 21:27:18.275 ERROR 10968 --- [ main] 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 1

把这个依赖注释掉就好了

原因

应用没有使用到DataSource，但是在pom.xml里引入了mybatis-spring-boot-starter

问题解决办法

有两种：

把mybatis-spring-boot-starter的依赖去掉，这样就不会触发spring boot相关的代码

把spring boot自动初始化DataSource相关的代码禁止掉

禁止的办法有两种：

在启动类的@SpringBootApplication加上

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

在application.properties里配置：

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

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