Java 定义为；jdbc.properties“；对于mybatis，但仍需要在application.properties中添加spring.datasource？

我不熟悉春靴和mybatis。我用spring initilizer生成了我的spring boot mybatis项目。 这是我的配置：

应用程序属性

mybatis config.xml

我认为这已经足够了，但是当我运行应用程序时，它会显示错误

SsmApplicationTests > contextLoads() FAILED
    java.lang.IllegalStateException at DefaultCacheAwareContextLoaderDelegate.java:132
        Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException at ConstructorResolver.java:798
            Caused by: org.springframework.beans.factory.BeanCreationException at ConstructorResolver.java:656
                Caused by: org.springframework.beans.BeanInstantiationException at SimpleInstantiationStrategy.java:185
                    Caused by: org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException at DataSourceProperties.java:235

但是当我将配置添加到application.properties时。它很好用

spring.datasource.url=jdbc:oracle:thin:@localhost:1521:test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver

---

我真的很困惑，有人知道为什么吗？

应该排除DataSourceAutoConfiguration.class，如下所示：

jdbc.driverClass=oracle.jdbc.OracleDriver
jdbc.url=jdbc:oracle:thin:@localhost:1521:test
jdbc.username=root
jdbc.password=root

SsmApplicationTests > contextLoads() FAILED
    java.lang.IllegalStateException at DefaultCacheAwareContextLoaderDelegate.java:132
        Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException at ConstructorResolver.java:798
            Caused by: org.springframework.beans.factory.BeanCreationException at ConstructorResolver.java:656
                Caused by: org.springframework.beans.BeanInstantiationException at SimpleInstantiationStrategy.java:185
                    Caused by: org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException at DataSourceProperties.java:235

spring.datasource.url=jdbc:oracle:thin:@localhost:1521:test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver