为mybatis定义了“jdbc.properties”，但仍需要在application.properties中添加spring.datasource？

Question

我是 spring 引导和 mybatis 的新手。 我使用 spring 初始化程序生成了我的 spring 引导 mybatis 项目。 这是我的配置：

应用程序属性

mybatis.config-location=classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations=classpath:mybatis/mappers/*.xml

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <properties resource="mybatis/jdbc.properties"></properties>

    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

    <typeHandlers>
        <typeHandler handler="com.mns.ssm.typehandlers.BooleanTypeHandler"></typeHandler>
    </typeHandlers>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driverClass}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
</configuration>

jdbc.properties

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

我认为这就足够了，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。 它工作正常。

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？

Answer 1

应排除 DataSourceAutoConfiguration.class，如下所示：