打印所有加载的Spring bean

时间：2012-03-07 13:46:34

标签： java spring

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。

8 个答案:

答案 0 :(得分：76)

是的，得到ApplicationContext并致电.getBeanDefinitionNames()

您可以通过以下方式获取上下文：

  • 实施ApplicationContextAware
  • 使用@Inject / @Autowired（2.5之后）注入
  • 使用WebApplicationContextUtils.getRequiredWebApplicationContext(..)

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

答案 1 :(得分：59)

public class PrintBeans {
    @Autowired
    ApplicationContext applicationContext;

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

答案 2 :(得分：19)

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";
    }
}

答案 3 :(得分：15)

使用Spring Boot和执行器启动器

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

您可以检查端点/beans

答案 4 :(得分：6)

您可以尝试拨打

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

或打开org.springframework的调试日志记录。 （在春季启动时，使用参数--logging.level.org.springframework=DEBUG）

答案 5 :(得分：4)

applicationContext.getBeanDefinitionNames（）不会不显示在没有 BeanDefinition实例的情况下注册的Bean。

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

如您在输出中看到的，将使用 context.getBeanDefinitionNames（）方法不显示环境，systemProperties，systemEnvironment Bean。

Spring Boot

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”，      “环境”，      “系统属性”，      “ systemEnvironment”，      “ org.springframework.context.annotation.internalConfigurationAnnotationProcessor”，      “ org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory”，      “ org.springframework.boot.autoconfigure.condition.BeanTypeRegistry”，      “ org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry”，      “ propertySourcesPlaceholderConfigurer”，      “ org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.store”，      “ preserveErrorControllerTargetClassPostProcessor”，      “ org.springframework.context.annotation.internalAutowiredAnnotationProcessor”，      “ org.springframework.context.annotation.internalRequiredAnnotationProcessor”，      “ org.springframework.context.annotation.internalCommonAnnotationProcessor”，      “ org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor”，      “ org.springframework.scheduling.annotation.ProxyAsyncConfiguration”，      “ org.springframework.context.annotation.internalAsyncAnnotationProcessor”，      “ methodValidationPostProcessor”，      “ embeddedServletContainerCustomizerBeanPostProcessor”，      “ errorPageRegistrarBeanPostProcessor”，      “ messageSource”，      “ applicationEventMulticaster”，      “ org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration $ EmbeddedTomcat”，      “ tomcatEmbeddedServletContainerFactory”，      “ org.springframework.boot.autoconfigure.websocket.WebSocketAutoConfiguration $ TomcatWebSocketConfiguration”，      “ websocketContainerCustomizer”，      “ spring.http.encoding-org.springframework.boot.autoconfigure.web.HttpEncodingProperties”，      “ org.springframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration”，      “ localeCharsetMappingsCustomizer”，      “ org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration”，      “ serverProperties”，      “ duplicateServerPropertiesDetector”，      “ spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties”，      “ org.springframework.boot.autoconfigure.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”，      “ hiddenHttpMethodFilter”，      “ httpPutFormContentFilter”，      “ characterEncodingFilter”，      “ org.springframework.context.event.internalEventListenerProcessor”，      “ org.springframework.context.event.internalEventListenerFactory”，      “ reportGeneratorApplication”，      “ exportController”，      “ exportService”，      “ org.springframework.boot.autoconfigure.AutoConfigurationPackages”，      “ org.springframework.boot.autoconfigure.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”，      “ org.springframework.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”，      “错误”，      “ beanNameViewResolver”，      “ errorAttributes”，      “ basicErrorController”，      “ org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ EnableWebMvcConfiguration”，      “ org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter”，      “ mvcContentNegotiationManager”，      “ org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration $ StringHttpMessageConverterConfiguration”，      “ stringHttpMessageConverter”，      “ org.springframework.boot.autoconfigure.web.JacksonHttpMessageConvertersConfiguration $ MappingJackson2HttpMessageConverterConfiguration”，      “ mappingJackson2HttpMessageConverter”，      “ org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration”，      “ messageConverters”，      “ mvcConversionService”，      “ mvcValidator”，      “ requestMappingHandlerAdapter”，      “ mvcResourceUrlProvider”，      “ requestMappingHandlerMapping”，      “ mvcPathMatcher”，      “ mvcUrlPathHelper”，      “ viewControllerHandlerMapping”，      “ beanNameHandlerMapping”，      “ resourceHandlerMapping”，      “ defaultServletHandlerMapping”，      “ mvcUriComponentsContributor”，      “ httpRequestHandlerAdapter”，      “ simpleControllerHandlerAdapter”，      “ handlerExceptionResolver”，      “ 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.LocalDevToolsAutoConfiguration $ LiveReloadConfiguration $ LiveReloadServerConfiguration”，      “ org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration $ LiveReloadConfiguration”，      “ OptionalLiveReloadServer”，      “ org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration”，      “ lifecycleProcessor”   ]

答案 6 :(得分：1)

使用spring-boot-starter-actuator可以轻松访问所有bean。

以下是设置过程：

  1. 将依赖项添加到gradle中：

将波纹管添加到gradle文件中：

compile("org.springframework.boot:spring-boot-starter-actuator")
  1. 启用application.properties的安全性：

将management.security.enabled=false添加到您的application.property文件中

  1. 呼叫/ beans端点：

    在那之后，安装弹簧将启用一些与指标相关的端点。 它的端点之一是 / beans 调用此终结点后，它将提供一个json文件，其中包含您所有的bean，包括其依赖项和范围。

这是一个示例json文件：

[{"context":"application:8442","parent":null,"beans":[{"bean":"beanName","aliases":[],"scope":"singleton","type":"packageName$$4b46c703","resource":"null","dependencies":["environment","beanName1","beanName2"]},{"bean":"org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory","aliases":[],"scope":"singleton","type":"org.springframework.core.type.classreading.CachingMetadataReaderFactory","resource":"null","dependencies":[]}]

有关更多信息，请访问以下链接：

希望这会对您有所帮助。谢谢：）

答案 7 :(得分：1)

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 ******************
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