怎么打印springboot中所有bean

您可以通过在SpringBoot应用程序中运行以下代码来列出所有Bean：

import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import java.util.Arrays;

@Component
public class BeanLister {

   private final ApplicationContext applicationContext;

   public BeanLister(ApplicationContext applicationContext) {
       this.applicationContext = applicationContext;
   }

   public void printAllBeanNames() {
       String[] beanNames = applicationContext.getBeanDefinitionNames();
       Arrays.sort(beanNames);
       for (String beanName : beanNames) {
           System.out.println(beanName);
       }
   }
}

使用该程序的示例方法是：

@SpringBootApplication
public class SpringbootAppApplication implements CommandLineRunner {

   private final BeanLister beanLister;

   public SpringbootAppApplication(BeanLister beanLister) {
       this.beanLister = beanLister;
   }

   public static void main(String[] args) {
       SpringApplication.run(SpringbootAppApplication.class, args);
   }

   @Override
   public void run(String... args) throws Exception {
       beanLister.printAllBeanNames();
   }
}

当Spring命令行运行器运行时，将会打印出所有Bean的名称。