Display all beans name loaded by Spring Boot

By Atul Rai | Last Updated: February 28, 2024 Previous       Next

In Spring Boot, you can display all the bean names loaded in the application context using the ApplicationContext object.

See the code example:

package org.websparrow;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {

        ApplicationContext ctx = SpringApplication.run(Application.class, args);

        System.out.println("Beans registered in Spring's application context");

        // loop all bean name registered with Spring Boot
        String[] beanDefinitionNames = ctx.getBeanDefinitionNames();
        for (String beanName : beanDefinitionNames) {
            System.out.println(beanName);
        }
    }
}

In this example:

• SpringApplication.run(Application.class, args) boots up your Spring Boot application and returns the ApplicationContext.
• ctex.getBeanDefinitionNames() retrieves an array of names of all the beans currently registered in the application context.
• We then iterate over these bean names and print them out.

Output:

Beans registered in Spring's application context
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
org.springframework.context.event.internalEventListenerProcessor
org.springframework.context.event.internalEventListenerFactory
application
org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory
operties.ConfigurationPropertiesBindingPostProcessor
org.springframework.boot.context.internalConfigurationPropertiesBinder
org.springframework.boot.context.properties.BoundConfigurationProperties
org.springframework.boot.context.properties.EnableConfigurationPropertiesRegistrar.methodValidationExcludeFilter
spring.ssl-org.springframework.boot.autoconfigure.ssl.SslProperties
org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$TomcatWebSocketConfiguration
websocketServletWebServerCustomizer
org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration
org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration
org.springframework.boot.autoconfigure.task.TaskExecutorConfigurations$ThreadPoolTaskExecutorBuilderConfiguration
threadPoolTaskExecutorBuilder
ework.boot.autoconfigure.task.TaskExecutionProperties
org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration
error
beanNameViewResolver
basicErrorController
errorPageCustomizer
.
.
.
.
.

References

1. Interface ApplicationContext
2. How to change default banner text in Spring Boot