SpringBoot啓動報錯Failed to determine a suitable driver class

SpringBoot啓動報錯以下

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   : 

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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).


Process finished with exit code 1

把這個依賴註釋掉就行了

緣由

應用沒有使用到DataSource，可是在pom.xml裏引入了mybatis-spring-boot-starter

問題解決辦法
有兩種：
把mybatis-spring-boot-starter的依賴去掉，這樣就不會觸發spring boot相關的代碼
把spring boot自動初始化DataSource相關的代碼禁止掉

禁止的辦法有兩種：

在啓動類的@SpringBootApplication加上

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

在application.properties裏配置：

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

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