Spring Boot错误——SpringBoot 2.0 报错: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

background

• Use Spring Cloud to build micro-service registration and discovery services being given (Eureka) project started, the following error

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

The reason given

• The Internet to find a solution, this error will generally be several reasons below
  • One reason: Spring Boot configuration, DataSourceAutoConfiguration will automatically load the data source
    • This class will be loaded by default when Spring boot org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration start, DataSourceAutoConfiguration class uses the annotation to the spring @Configuration injected dataSource bean. If you can not find the data source configuration file information in the project, the project will error on startup
  • Two reasons: no added application.properties/ or application.yml file database configuration information
    • Spring Boot classpath will automatically load the data source information in the configuration file, if the data corresponding to the source information is not found, it will error
  • Because I built a service registration and discovery (Eureka) project, the project does not require a data source configuration, it is being given a reason: Spring Boot configuration DataSourceAutoConfiguration automatically load the data sources, data source information but can not find cause of

Solution

• In Spring Boot startup class annotate @SpringBootApplication (DataSourceAutoConfiguration.class the exclude = {}) , represents the start does not require the data source to automatically load the item

@EnableEurekaServer
@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
public class EurekaApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaApplication.class, args);
    }
}

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