本文参考：https://blog.csdn.net/coyotess/article/details/80637837

错误内容:

***************************
APPLICATION FAILED TO START
***************************
 
Description:
 
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
 
Reason: Failed to determine a suitable driver class
 
 
Action:
 
Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

解决方法：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@ImportResource("classpath:consumer.xml")
public class EmsWebApplication {
    public static void main(String[] args) throws Exception{
        SpringApplication.run(EmsWebApplication.class, args);
    }
}

源码分析：待补充。