今天下午在启动spring cloud微服务的时候，报了这个错误：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-07-03 20:17:10.295 ERROR 19024 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   :

***************************
APPLICATION FAILED TO START
***************************

Description:

Cannot determine embedded database driver class for database type NONE

Action:

If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).

Disconnected from the target VM, address: '127.0.0.1:55393', transport: 'socket'

Process finished with exit code 1

刚开始我以为是端口被占用。果断cmd并输入netstat -aon，找半天没发现占用的端口，然后又网上看了一下，

转自：https://blog.csdn.net/Loser100/article/details/78190703?locationNum=9&fps=1

SpringBoot启动报错：Cannot determine embedded database driver class for database type NONE

springboot启动时会自动注入数据源和配置jpa

解决办法一：启动类中加入注解：@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class})

解决方法二：在Application.properties文件内配置数据源即可。代码如下：

spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5

我仔细的检查了一下，也加了注解，试了一下，我靠，没用啊，人生呐，真是改不完的bedug，

只好用出终极大招，拷贝我自己的代码，删除项目，从新从svn更新项目，导入运行，哎呦我去。怎么还是这问题？难道是我项目配置问题?不对啊，我其他的项目都没有问题啊。束手无策，只好求助小碗（一个认真工作的大佬）；

通过反复调试，终于找到了。问题所在，pom.xml里面有一个错误的配置，

       <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

删了就可以运行，微服务也可以注册。配置文件请大家仔细检查。配置文件不对，什么都是扯淡。

原文出处