Print all the Spring beans that are loaded - Spring Boot

Question

How can I get to know names of all the beans that are loaded as part of my spring boot app? I would like have some code in main method to print the details of beans that are loaded once the server is started up.

Answer 1

As shown in the getting started guide of spring-boot: https://spring.io/guides/gs/spring-boot/

@SpringBootApplication public class Application {    public static void main(String[] args) {     SpringApplication.run(Application.class, args);   }    @Bean   public CommandLineRunner commandLineRunner(ApplicationContext ctx) {     return args -> {        System.out.println("Let's inspect the beans provided by Spring Boot:");        String[] beanNames = ctx.getBeanDefinitionNames();       Arrays.sort(beanNames);       for (String beanName : beanNames) {         System.out.println(beanName);       }     };   }     } 

As @Velu mentioned in the comments, this will not list manually registered beans.

In case you want to do so, you can use getSingletonNames(). But be careful. This method only returns already instantiated beans. If a bean isn't already instantiated, it will not be returned by getSingletonNames().