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JAVA EXAMPLE PROGRAMS

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Spring Boot – List all Beans loaded in the ApplicationContext


Spring Boot loads many beans into ApplicationContext on start up depends on the dependencies as per your pom.xml.

You can call applicationContext.getBeanDefinitionNames() method to list all beans loaded into ApplicationContext.

SpringBootWebApplication
package com.java2novice.springboot;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;

@SpringBootApplication
public class SpringBootWebApplication implements CommandLineRunner{

	private static Logger logger = LoggerFactory.getLogger(SpringBootWebApplication.class);

	@Autowired
    private ApplicationContext applicationContext;

	public static void main(String[] args) throws Exception {

		SpringApplication.run(SpringBootWebApplication.class, args);
	}

	@Override
    public void run(String... args) throws Exception {

		String[] beans = applicationContext.getBeanDefinitionNames();
		for (String bean : beans) {
            System.out.println(bean);
        }
	}
}

The output for above code is:

Output
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalRequiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
org.springframework.context.event.internalEventListenerProcessor
org.springframework.context.event.internalEventListenerFactory
springBootWebApplication
org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory
helloWorldController
cmdbProperties
org.springframework.boot.autoconfigure.AutoConfigurationPackages
org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration
org.springframework.boot.autoconfigure.condition.BeanTypeRegistry
propertySourcesPlaceholderConfigurer
org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration
standardJacksonObjectMapperBuilderCustomizer
spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties
org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor
org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.store
org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperBuilderConfiguration
jacksonObjectMapperBuilder
org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperConfiguration
jacksonObjectMapper
org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration
jsonComponentModule
org.springframework.boot.autoconfigure.websocket.WebSocketAutoConfiguration$TomcatWebSocketConfiguration
websocketContainerCustomizer
org.springframework.boot.autoconfigure.websocket.WebSocketAutoConfiguration
org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration$EmbeddedTomcat
tomcatEmbeddedServletContainerFactory
org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration
embeddedServletContainerCustomizerBeanPostProcessor
errorPageRegistrarBeanPostProcessor
org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration$DispatcherServletConfiguration
dispatcherServlet
spring.mvc-org.springframework.boot.autoconfigure.web.WebMvcProperties
org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration
dispatcherServletRegistration
org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration
org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration
jsr303Validator
methodValidationPostProcessor
org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration
error
beanNameViewResolver
org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration
conventionErrorViewResolver
org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration
errorAttributes
basicErrorController
errorPageCustomizer
preserveErrorControllerTargetClassPostProcessor
spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties
org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration
requestMappingHandlerAdapter
requestMappingHandlerMapping
mvcValidator
mvcPathMatcher
mvcUrlPathHelper
mvcContentNegotiationManager
viewControllerHandlerMapping
beanNameHandlerMapping
resourceHandlerMapping
mvcResourceUrlProvider
defaultServletHandlerMapping
mvcConversionService
mvcUriComponentsContributor
httpRequestHandlerAdapter
simpleControllerHandlerAdapter
handlerExceptionResolver
mvcViewResolver
org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter$FaviconConfiguration
faviconHandlerMapping
faviconRequestHandler
org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter
defaultViewResolver
viewResolver
welcomePageHandlerMapping
requestContextFilter
org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration
hiddenHttpMethodFilter
httpPutFormContentFilter
org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration
mbeanExporter
objectNamingStrategy
mbeanServer
org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration
org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration
stringHttpMessageConverter
spring.http.encoding-org.springframework.boot.autoconfigure.web.HttpEncodingProperties
org.springframework.boot.autoconfigure.web.JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration
mappingJackson2HttpMessageConverter
org.springframework.boot.autoconfigure.web.JacksonHttpMessageConvertersConfiguration
org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration
messageConverters
org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration
spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties
org.springframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration
characterEncodingFilter
localeCharsetMappingsCustomizer
org.springframework.boot.autoconfigure.web.MultipartAutoConfiguration
multipartConfigElement
multipartResolver
spring.http.multipart-org.springframework.boot.autoconfigure.web.MultipartProperties
org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration
serverProperties
duplicateServerPropertiesDetector
org.springframework.boot.autoconfigure.web.WebClientAutoConfiguration$RestTemplateConfiguration
restTemplateBuilder
org.springframework.boot.autoconfigure.web.WebClientAutoConfiguration
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Spring-Boot Examples

  1. Spring-Boot initial setup.
  2. Spring-Boot hello world example
  3. What is spring-boot-starter-parent in Spring-Boot pom.xml file?
  4. What is @SpringBootApplication annotation in spring boot?
  5. What is application.properties in spring boot?
  6. What is @ConfigurationProperties annotation in spring boot?
  7. Spring Boot @ConfigurationProperties example
  8. Spring Boot @ConfigurationProperties Property Validation
  9. Difference between @ConfigurationProperties and @Value
  10. Spring boot web application configurations.
  11. How to run spring boot application through command line?
  12. How to run spring boot as a standalone application (non-web)?
  13. Spring boot property resolution order.
  14. Spring Boot – Profile based properties example.
  15. How to configure logback (SLF4J) logging to spring boot applications?
  16. How to update application context path in spring boot?
  17. How to disable spring logo banner in spring boot?
  18. Spring Data JPA with Spring Boot Applications - Oracle - example
  19. Spring Data JPA with Spring Boot Applications - MySql example
  20. How to configure Spring Boot to show Hibernate SQL Query in logs?
  21. Spring Boot – List all Beans loaded in the ApplicationContext
  22. How to load external property files into Spring Boot application?
  23. How to rename application.properties file in Spring Boot application?
  24. How to configure multiple DataSources (Databases) with Spring Boot and Spring Data?
Knowledge Centre
Purpose of garbage collection
The garbage collection process is to identify the objects which are no longer referenced or needed by a program so that their resources can be reclaimed and reused. These identified objects will be discarded.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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