SpringBoot启动原理1

@Import(AutoConfigurationImportSelector.class)

@SpringBootConfiguration

@ComponentScan

@Configutation

@SpringBootApplication

扫描当前包及其子包中的bean

创建SpringbootApplication对象

@EnableAutoConfiguration

1、selectImports2、getAutoConfigurationEntry3、getCandidateConfigurations4、SpringFactoriesLoader.loadFactoryNames读取spring-boot-autoconfigure.jar中META-INF/spring.factories中的org.springframework.boot.autoconfigure配置项，注册到容器中