Spring Boot 2启动报错 Reason: Failed to determine a suitable driver class

启动Spring Boot 2新建的项目，启动和测试Test报错，报错内容如下：

 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-02-21 22:32:54.079 ERROR 19680 --- [           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).
 

原因：

工程没有配置数据库。

 

解决方法：

配置H2数据库或者MySQL数据库，其中配置MySQL解决方法如下：

1、添加 MySQL连接驱动的依赖

Maven工程在pom.xml中添加

        
            mysql
            mysql-connector-java
        

gradle工程在build.gradle中添加

implementation 'mysql:mysql-connector-java'

 

2、在application.properties中添加MySQL数据库配置

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver 
spring.datasource.url=jdbc:mysql://localhost:3306/blog?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
spring.datasource.username=用户名
spring.datasource.password=密码