打印所有加载的Spring bean

Question

有没有办法打印启动时加载的所有spring bean？我使用的是Spring 2.0.

Answer 1

是的,得到支持ApplicationContext并致电.getBeanDefinitionNames()

您可以通过以下方式获取上下文

• 实施 ApplicationContextAware
• 与注射它@Inject/ @Autowired(2.5)之后
• 使用 WebApplicationContextUtils.getRequiredWebApplicationContext(..)

相关:您还可以通过注册BeanPostprocessorbean 来检测每个bean的注册.每个bean都会收到通知.

Answer 2

public class PrintBeans {
    @Autowired
    ApplicationContext applicationContext;

    public void printBeans() {
        System.out.println(Arrays.asList(applicationContext.getBeanDefinitionNames()));
    }
}

Answer 3

打印所有bean名称及其类:

package com.javahash.spring.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class HelloWorldController {

    @Autowired
    private ApplicationContext applicationContext;

    @RequestMapping("/hello")
    public String hello(@RequestParam(value="key", required=false, defaultValue="World") String name, Model model) {

        String[] beanNames = applicationContext.getBeanDefinitionNames();

        for (String beanName : beanNames) {

            System.out.println(beanName + " : " + applicationContext.getBean(beanName).getClass().toString());
        }

        model.addAttribute("name", name);

        return "helloworld";
    }
}

Answer 4

使用Spring Boot和执行器启动器

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

你可以检查端点 /beans

Answer 5

你可以尝试打电话

org.springframework.beans.factory.ListableBeanFactory.getBeansOfType(Object.class)

或者打开调试日志记录org.springframework.(在春季启动时,那是使用参数--logging.level.org.springframework=DEBUG)

Answer 6

applicationContext.getBeanDefinitionNames（）并没有显示其注册的豆子没有的BeanDefinition实例。

package io.velu.core;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan
public class Core {

public static void main(String[] args) {
    AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(Core.class);
    String[] singletonNames = context.getDefaultListableBeanFactory().getSingletonNames();
    for (String singleton : singletonNames) {
        System.out.println(singleton);
    }       
}

}

控制台输出

environment
systemProperties
systemEnvironment
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry
org.springframework.context.event.internalEventListenerProcessor
org.springframework.context.event.internalEventListenerFactory
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
messageSource
applicationEventMulticaster
lifecycleProcessor

正如您在输出中看到的那样，不会使用context.getBeanDefinitionNames（）方法显示环境，systemProperties和systemEnvironment Bean 。

春季靴

对于Spring Boot Web应用程序，可以使用以下端点列出所有bean。

@RestController
@RequestMapping("/list")
class ExportController {

@Autowired
private ApplicationContext applicationContext;

@GetMapping("/beans")
@ResponseStatus(value = HttpStatus.OK)
String[] registeredBeans() {
    return printBeans();
}

private String[] printBeans() {
    AutowireCapableBeanFactory autowireCapableBeanFactory = applicationContext.getAutowireCapableBeanFactory();
    if (autowireCapableBeanFactory instanceof SingletonBeanRegistry) {
        String[] singletonNames = ((SingletonBeanRegistry) autowireCapableBeanFactory).getSingletonNames();
        for (String singleton : singletonNames) {
            System.out.println(singleton);
        }
        return singletonNames;
    }
    return null;
}

}

[“ autoConfigurationReport”，“ springApplicationArguments”，“ springBootBanner”，“ springBootLoggingSystem”，“ environment”，“ systemProperties”，“ systemEnvironment”，“ org.springframework.context.annotation.internalConfigurationAnnotationProcessor”，“ org.springframework.boot.autoconfigure。” internalCachingMetadataReaderFactory”，“ org.springframework.boot.auto.config.condition.BeanTypeRegistry”，“ org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry”，“ propertySourcesPlaceholderConfigurer”，“ org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.store” ，“prepareErrorControllerTargetClassPostProcessor“，” org.springframework.context.annotation.internalAutowiredAnnotationProcessor“，” org.springframework.context.annotation.internalRequiredAnnotationProcessor“，” org.springframework.context.annotation.internalCommonAnnotationProcessor“，” org.springframeproperties.boot。 ConfigurationPropertiesBindingPostProcessor”，“ org.springframework.scheduling.annotation.ProxyAsyncConfiguration”，“ org.springframework.context.annotation.internalAsyncAnnotationProcessor”，“ methodValidationPostProcessor”，“ embeddedServletContainerCustomizerBeanPostProcessor”，“ errorPageRegistrarBeanPostSource”，“applicationEventMulticaster”，“ org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration $ EmbeddedTomcat”，“ tomcatEmbeddedServletContainerFactory”，“ org.springframework.boot.autoconfigure.websocket.WebSocketAutoConfiguration $ TomcatWebSocketConfiguration”，“ websocketContainerCustomen”编码“ spring.http”。 org.springframework.boot.autoconfigure.web.HttpEncodingProperties”，“ org.springframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration”，“ localeCharsetMappingsCustomizer”，“ org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration”，“ serverProperties”，“ plicatorServerPropertiesDetector”，“ spring.resources-org.springframework.boot。autoconfigure.web.ResourceProperties”，“ org.springframework.boot.auto.config.web.ErrorMvcAutoConfiguration $ DefaultErrorViewResolverConfiguration”，“ conventionErrorViewResolver”，“ org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration”，“ errorPageCustomizer”，“ servletContext”，“ contextParameters”，“ contextAttributes”，“ spring.mvc-org.springframework.boot.autoconfigure.web.WebMvcProperties”，“ spring.http.multipart-org.springframework.boot.autoconfigure.web.MultipartProperties”，“ org.springframework”。 boot.autoconfigure.web.MultipartAutoConfiguration”，“ multipartConfigElement”，“ org.springframework.boot.autoconfigure.web”。DispatcherServletAutoConfiguration $ DispatcherServletRegistrationConfiguration”，“ org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration $ DispatcherServletConfiguration”，“ dispatcherServlet”，“ dispatcherServletRegistration”，“ requestContextFilter”，“ org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration”，“ hiddenHttpMethod” ，“ httpPutFormContentFilter”，“ characterEncodingFilter”，“ org.springframework.context.event.internalEventListenerProcessor”，“ org.springframework.context.event.internalEventListenerFactory”，“ reportGeneratorApplication”，“ exportController”，“ exportService”，“ org.springframework”。开机。autoconfigure.AutoConfigurationPackages”，“ org.springframework.boot.auto.config.context.PropertyPlaceholderAutoConfiguration”，“ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration $ Jackson2ObjectMapperBuilderCustomizerConfiguration”，“ spring.jackson-org.springframework.boot.autoconfigure.jackson”。 JacksonProperties”，“ standardJacksonObjectMapperBuilderCustomizer”，“ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration $ JacksonObjectMapperBuilderConfiguration”，“ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration”，“ jsonComponentModule”，“ jacksonObjectMapperBuilder”，“ orgspring”。 boot.autoconfigure.jackson。JacksonAutoConfiguration $ JacksonObjectMapperConfiguration”，“ jacksonObjectMapper”，“ org.springframework.boot.autoconfigure.websocket.WebSocketAutoConfiguration”，“ org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration”，“ org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration” ，“ org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration”，“ defaultValidator”，“ org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration”，“ error”，“ beanNameViewResolver”，“ errorAttributes”，“ basicErrorController” ，“ org.springframework.boot.autoconfigure.web。WebMvcAutoConfiguration $ EnableWebMvcConfiguration”，“ org.springframework.boot.auto.config.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter”，“ mvcContentNegotiationManager”，“ org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration $ StringHttpMessageConverterConfiguration”，“ stringHttpMessageConverterwork”，“ org.spring.org”。 boot.autoconfigure.web.JacksonHttpMessageConvertersConfiguration $ MappingJackson2HttpMessageConverterConfiguration”，“ mappingJackson2HttpMessageConverter”，“ org.springframework.boot.auto.config.web.HttpMessageConvertersAutoConfiguration”，“ messageConverters”，“ mvcConversionService”，“ mvcValidator”，“requestMappingHandlerAdapter”，“ mvcResourceUrlProvider”，“ requestMappingHandlerMapping”，“ mvcPathMatcher”，“ mvcUrlPathHelper”，“ viewControllerHandlerMapping”，“ beanNameHandlerMapping”，“ resourceHandlerMapping”，“ defaultServletHandlerMapping”，“ mvcUriComponentsContributor”，“ httpRequestHandlerAdapterHandlerException” ，“ mvcViewResolver”，“ org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter $ FaviconConfiguration”，“ faviconRequestHandler”，“ faviconHandlerMapping”，“ defaultViewResolver”，“viewResolver”，“ welcomePageHandlerMapping”，“ org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration”，“ objectNamingStrategy”，“ mbeanServer”，“ mbeanExporter”，“ org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration”，“ springApplicationAdminRegistrar” ，“ org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration”，“ org.springframework.boot.autoconfigure.web.JacksonHttpMessageConvertersConfiguration”，“ spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties”，“ org。 springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration”，“ multipartResolver”，“ org。springframework.boot.autoconfigure.web.WebClientAutoConfiguration $ RestTemplateConfiguration”，“ restTemplateBuilder”，“ org.springframework.boot.autoconfigure.web.WebClientAutoConfiguration”，“ spring.devtools-org.springframework.boot.devtools.autoconfigure.DevToolsProperties”，“ org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration $ RestartConfiguration“，” fileSystemWatcherFactory“，” classPathRestartStrategy“，” classPathFileSystemWatcher“，” hateoasObjenesisCacheDisabler“，” org.springframework.boot.devtools.autoconfigure.LocalRevToolsAutoConfiguration $ Live org.springframework.boot.devtools.autoconfigure。LocalDevToolsAutoConfiguration $ LiveReloadConfiguration”，“ OptionalLiveReloadServer”，“ org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration”，“ lifecycleProcessor”]

Answer 7

这是从 spring 应用程序上下文中打印所有 bean 名称的另一种方法：

import java.util.Arrays;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

/***********************************************************************************************************
 * Java File: MainApplication.java
 * Description: Main class to run the application.
 * 
 ***********************************************************************************************************/

@SpringBootApplication
public class MainApplication {

private static final Logger logger = LogManager.getLogger(MainApplication.class);

public static void main(String[] args) 
{
    final ConfigurableApplicationContext context = SpringApplication.run(MainApplication.class, args);

    final AtomicInteger counter = new AtomicInteger(0);
    logger.info("**************** START: Total Bean Objects: {} ******************", context.getBeanDefinitionCount());

    Arrays.asList(context.getBeanDefinitionNames())
    .forEach(beanName -> {
        logger.info("{}) Bean Name: {} ", counter.incrementAndGet(), beanName);
    });

    logger.info("**************** END: Total Bean: {} ******************", context.getBeanDefinitionCount());
}

}


Sample Output:

2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:18] - **************** START: Total Bean Objects: 564 ****************** 
...........................
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:22] - 460) Bean Name: mvcPathMatcher  
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:22] - 461) Bean Name: mvcUrlPathHelper  
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:22] - 462) Bean Name: viewControllerHandlerMapping  
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:22] - 463) Bean Name: beanNameHandlerMapping  
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:22] - 464) Bean Name: resourceHandlerMapping 
...........................
2019-11-27 20:08:02.821 INFO  [main] [c.c.a.MainApplication:25] - **************** END: Total Bean: 564 ******************