package com.baeldung.componentscan.springbootapp; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.Bean; import com.baeldung.componentscan.ExampleBean; @SpringBootApplication // @ComponentScan(basePackages = "com.baeldung.componentscan.springbootapp.animals") // @ComponentScan ( excludeFilters = @ComponentScan.Filter(type=FilterType.REGEX,pattern="com\\.baeldung\\.componentscan\\.springbootapp\\.flowers\\..*")) // @ComponentScan(excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = Rose.class)) public class SpringBootComponentScanApp { private static ApplicationContext applicationContext; @Bean public ExampleBean exampleBean() { return new ExampleBean(); } public static void main(String[] args) { applicationContext = SpringApplication.run(SpringBootComponentScanApp.class, args); checkBeansPresence("cat", "dog", "rose", "exampleBean", "springBootApp"); } private static void checkBeansPresence(String... beans) { for (String beanName : beans) { System.out.println("Is " + beanName + " in ApplicationContext: " + applicationContext.containsBean(beanName)); } } }