Error starting ApplicationContext. To display the conditions report re-run your application with ‘de

1.springboot启动报错

今天跟这雷神学习到第二部分时运行springboot出现了这个错误

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-05-11 23:41:23.397 ERROR 22192 --- [           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

在网上找了一下原因:
在pom.xml文件中导入了WEB、Redis、MyBatis依赖但是没有使用

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
 </dependency>

解决方法

第一种:在springboot项目的启动类也就是有@SpringBootApplication注解的那个类,在后面加入排除检验数据库合法校验规则 （排除即可）

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

第二种:在springboot项目的application.properties或者application.yaml文件中配置数据源信息完成校验即可。