转自：https://www.cnblogs.com/kmsfan/p/7189626.html

017-05-04 11:22:54.957  INFO 6164 --- [           main] com.example.GirlApplication              : Starting GirlApplication on GOAFJLQVOL9HVXB with PID 6164 (E:\girl\target\classes started by Administrator in E:\girl)

2017-05-04 11:22:54.959  INFO 6164 --- [           main] com.example.GirlApplication              : The following profiles are active: dev

2017-05-04 11:22:55.155  INFO 6164 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6b4a4e18: startup date [Thu May 04 11:22:55 CST 2017]; root of context hierarchy

2017-05-04 11:22:56.182  INFO 6164 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)

2017-05-04 11:22:56.189  INFO 6164 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat

2017-05-04 11:22:56.190  INFO 6164 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.14

2017-05-04 11:22:56.253  INFO 6164 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

2017-05-04 11:22:56.254  INFO 6164 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1102 ms

2017-05-04 11:22:56.350  INFO 6164 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]

2017-05-04 11:22:56.353  INFO 6164 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]

2017-05-04 11:22:56.353  INFO 6164 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

2017-05-04 11:22:56.353  INFO 6164 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]

2017-05-04 11:22:56.353  INFO 6164 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]

2017-05-04 11:22:56.381  WARN 6164 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. 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 (the profiles "dev" are currently active).

2017-05-04 11:22:56.383  INFO 6164 --- [           main] o.apache.catalina.core.StandardService   : Stopping service Tomcat

2017-05-04 11:22:56.397  INFO 6164 --- [           main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.

2017-05-04 11:22:56.404 ERROR 6164 --- [           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 (the profiles "dev" are currently active).

Process finished with exit code 1

 

 

您好，这是因为你的 application.yml 文件中关于数据库的配置格式出错导致的。注意：datasource之前要有空格，也就是说完整的配置应该是 spring.datasource.driver-class-name.以下为我的配置：

spring:

 profiles:

   active: dev

 datasource:

   driver-class-name: com.mysql.jdbc.Driver

   url: jdbc:mysql://127.0.0.1:3306/ddgirl

   username: root

   password: root

 jpa:

   hibernate:

     ddl-auto: update

   show-sql: true