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

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-09-30 12:20:28.527 ERROR 2816 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :

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APPLICATION FAILED TO START
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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).

Disconnected from the target VM, address: '127.0.0.1:50116', transport: 'socket'

Process finished with exit code 1

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class OrderServerApplication {

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

}