Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

创建启动类，启动报错

如下：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-08-01 16:23:55.064 ERROR 2216 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
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).


Process finished with exit code 1

原因：启动时候，找数据库配置，但是现在模块因为不需要操作数据库，只是做上传到oss启动，没有配置数据库，所以报错。

有两种解决方式：

1、添加上数据库配置

2、在启动类添加属性，默认不去加载数据库配置

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)//加上数据源
@ComponentScan(basePackages = {"com.xxx"})
public class OssApplication {

    public static void main(String[] args) {
        SpringApplication.run(OssApplication.class,args);
    }
}