1. 报错场景

邮件服务不需要连接数据库， 但是底层包中引入了


org.mybatis.spring.boot
mybatis-spring-boot-starter
 包

2. 报错

  1. Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  2. 2021-12-10 17:08:49.976 ERROR 12188 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
  4. ***************************
  5. APPLICATION FAILED TO START
  6. ***************************
  8. Description:
  10. Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
  12. Reason: Failed to determine a suitable driver class
  15. Action:
  17. Consider the following:
  18.     If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
  19.     If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
  21. Disconnected from the target VM, address: '127.0.0.1:61178', transport: 'socket'
  23. Process finished with exit code 1

3. 处理方案：

3.1 配置文件中设置数据库连接信息

  1. spring:
  2.   application:
  3.     name: ml-finance-service
  4.   datasource:
  5.     driver-class-name: com.mysql.cj.jdbc.Driver
  6.     url: jdbc:mysql://****/**?allowMultiQueries=true&serverTimezone=GMT%2B8&characterEncoding=utf8
  7.     username: ml
  8.     password: Ml123456..

3.2 启动类设置 @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})

  1. /**
  2.  * @author ml
  3.  */
  4. @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
  5. @ComponentScan("com.ml")
  6. public class MailApplication extends SpringBootServletInitializer {
  8.     public static void main(String[] args) {
  9.         new SpringApplicationBuilder(MailApplication.class).run(args);
  10.     }
  11. }