How to display all beans loaded by Spring Boot
By：Roy.LiuLast updated：2019-08-11
In Spring Boot, you can use appContext.getBeanDefinitionNames() to get all the beans loaded by the Spring container.
1. CommandLineRunner as Interface
Application.java
package com.mkyong;
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;
import java.util.Arrays;
@SpringBootApplication
public class Application implements CommandLineRunner {
@Autowired
private ApplicationContext appContext;
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
@Override
public void run(String... args) throws Exception {
String[] beans = appContext.getBeanDefinitionNames();
Arrays.sort(beans);
for (String bean : beans) {
System.out.println(bean);
Output
Console.java
application customerRepository customerRepositoryImpl dataSource dataSourceInitializedPublisher dataSourceInitializer dataSourceInitializerPostProcessor emBeanDefinitionRegistrarPostProcessor entityManagerFactory entityManagerFactoryBuilder hikariPoolDataSourceMetadataProvider jdbcTemplate jpaContext //...
2. CommandLineRunner as Bean
Just different ways to print the loaded beans.
Application.java
package com.mkyong;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import java.util.Arrays;
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
@Bean
public CommandLineRunner run(ApplicationContext appContext) {
return args -> {
String[] beans = appContext.getBeanDefinitionNames();
Arrays.stream(beans).sorted().forEach(System.out::println);
};
References
From：一号门
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