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

今天在使用Spring Boot开发项目时项目，启动Spring Boot，报错，报错内容如下：

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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).

原因分析：项目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(注意自己的驱动版本)

Maven工程在pom.xml中添加

<dependency>
	<groupId>mysql</groupId>
	<artifactId>mysql-connector-java</artifactId>
	<version>5.1.46</version>
</dependency>

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

3.刷新项目，重新启动程序即可。