项目Bug：
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-05-11 16:21:38.046 ERROR 7232 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
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APPLICATION FAILED TO START
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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).
附图：
解决办法：
1）添加jdbc依赖和mysql链接依赖：
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency>
2）web项目中，application.properties 被优先加载 了，但这个文件我这儿没改之前是空的。导致jdbc 配置找不到，driver就是none。所以，要么在persist中加个application，要么在web中加一个，且不为空。
3）启动类中，要排除jpa类。如图：
