Print all beans loaded by Spring Boot

In this post, we will see how to print all the beans loaded by Spring boot.

We have already created a sample spring boot hello world program using JSP. You must be wondering what beans have been loaded by Spring in background.

Change SpringBootHelloWorldApplication.java as below:

package org.arpit.java2blog;

import java.util.Arrays;

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 SpringBootHelloWorldApplication implements CommandLineRunner {

@Autowired

private ApplicationContext appContext;

public static void main(String[] args)

{

SpringApplication.run(SpringBootHelloWorldApplication.class, args);

}

@Override

public void run(String... arg0) throws Exception {

String[] beans = appContext.getBeanDefinitionNames();

Arrays.sort(beans);

for (String bean : beans) {

System.out.println(bean);

}

You just need to implement CommandLineRunner and get ApplicatationContext object using @Autowire annotation.

basicErrorController
beanNameHandlerMapping
beanNameViewResolver
characterEncodingFilter
conventionErrorViewResolver
defaultServletHandlerMapping
defaultValidator
defaultViewResolver
dispatcherServlet
dispatcherServletRegistration
duplicateServerPropertiesDetector
embeddedServletContainerCustomizerBeanPostProcessor
error
errorAttributes
errorPageCustomizer
errorPageRegistrarBeanPostProcessor
faviconHandlerMapping
faviconRequestHandler
handlerExceptionResolver
helloWorldController
hiddenHttpMethodFilter
httpPutFormContentFilter
httpRequestHandlerAdapter
jacksonObjectMapper
jacksonObjectMapperBuilder
jsonComponentModule
localeCharsetMappingsCustomizer
mappingJackson2HttpMessageConverter
…
…

That’s all about how to print all the beans loaded by Spring boot

Java2Blog

Print all beans loaded by Spring Boot

Spring boot JDBC example

Spring boot devtools tutorial

Spring boot H2 Database example

Spring Boot CrudRepository

Difference between Spring and Spring boot

Spring Boot SOAP Web service Example

Spring boot profiles example

Spring Profile annotation example

Spring boot @ConfigurationProperties

Spring boot starters

Related posts