注解:
@springBootConfiguration : springboot 的配置
@Configuration:spring配置类
@Component: 说明这也是一个spring的组件
@EnableAutoConfiguration : 自动配置
@AutoConfigurationPackage: 自动配置包
@Import(AutoConfigurationPackages.Registrar.class): 自动配置包注册
@Import(AutoConfigurationImportSelector.class): 自动配置导入选择
// 获取所有的配置
List<String> configurations = getCandidateConfigurations(annotationMetadata,attributes)
//获取候选的配置
protected List<String> getCandidateConfigurations(AnnotationMetadata metadata, AnnotationAttributes attributes) {
List<String> configurations = SpringFactoriesLoader.loadFactoryNames(getSpringFactoriesLoaderFactoryClass(),
getBeanClassLoader());
Assert.notEmpty(configurations, "No auto configuration classes found in META-INF/spring.factories. If you "
+ "are using a custom packaging, make sure that file is correct.");
return configurations;
}
META-INF/sring.factories: 自动配置的核心文件
// 所有资源加载到配置类中
// Map<String, List<String>> loadSpringFactories 方法
Properties properties = PropertiesLoaderUtils.loadProperties(resource);
此为具体的流程图