SpringBoot启动失败：Error starting ApplicationContext.

新建了SpringBoot项目，启动时报以下错误：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-09-05 09:02:14.985 ERROR 8444 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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。