Question

启动spring boot报错，怎么解决

Answer 1

【解决办法】

需要在启动类的@EnableAutoConfiguration或@SpringBootApplication中添加exclude = {DataSourceAutoConfiguration.class}，排除此类的autoconfig。启动以后就可以正常运行。

【原因】

这个原因是maven依赖包冲突，有重复的依赖。

【Spring   Boot】

Spring Boot是由Pivotal团队提供的全新框架，其设计目的是用来简化新Spring应用的初始搭建以及开发过程。

该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。通过这种方式，Spring Boot致力于在蓬勃发展的快速应用开发领域(rapid application development)成为领导者。

Answer 2

今天准备把我之前搭建的，基于springboot的框架的基础功能包抽离出来，在增加spring yml自定义设置后，在业务项目启动时会报出以下异常。
2017-02-23 18:55:09.869 WARN main org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext[refresh:550] - Exception encountered during context initialization - cancelling refresh attempt: 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,redis,config,mongodb,activemq,socketio" are currently active).
2017-02-23 18:55:14.322 INFO main com.corundumstudio.socketio.SocketIOServer[stop:198] - SocketIO server stopped
2017-02-23 18:55:14.349 INFO main org.springframework.boot.autoconfigure.logging.AutoConfigurationReportLoggingInitializer[logAutoConfigurationReport:101] -

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-02-23 18:55:14.355 ERROR main org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter[report:42] -

***************************
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,redis,config,mongodb,activemq,socketio" are currently active).123456789101112131415161718123456789101112131415161718
在多方查证后，需要在启动类的@EnableAutoConfiguration或@SpringBootApplication中添加exclude
= {DataSourceAutoConfiguration.class}，排除此类的autoconfig。启动以后就可以正常运行。