为了排除自动启动的Redis，看了一下排除逻辑： @SpringBootApplication(exclude = { DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class, MongoAutoConfiguration.class, MongoDataAutoConfiguration.class, RedisAutoConfiguration.class, RedisRepositoriesAutoConfiguration.class })

在AutoConfigurationImportSelector类里

public String[] selectImports(AnnotationMetadata annotationMetadata) {
	if (!isEnabled(annotationMetadata)) {
		return NO_IMPORTS;
	}
	try {
		AutoConfigurationMetadata autoConfigurationMetadata = AutoConfigurationMetadataLoader
				.loadMetadata(this.beanClassLoader);
		AnnotationAttributes attributes = getAttributes(annotationMetadata);
		List<String> configurations = getCandidateConfigurations(annotationMetadata,
				attributes);
		configurations = removeDuplicates(configurations);
		configurations = sort(configurations, autoConfigurationMetadata);
		Set<String> exclusions = getExclusions(annotationMetadata, attributes);
		checkExcludedClasses(configurations, exclusions);
		configurations.removeAll(exclusions);
		configurations = filter(configurations, autoConfigurationMetadata);
		fireAutoConfigurationImportEvents(configurations, exclusions);
		return configurations.toArray(new String[configurations.size()]);
	}
	catch (IOException ex) {
		throw new IllegalStateException(ex);
	}
}

先从META-INF/spring.factories加载所有自动加载的，然后根据获取的注解中获取的移除掉

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