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。
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：
ApplicationContextAware @Inject / @Autowired（2.5之后）注入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);
}
}
}
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。
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：
将波纹管添加到gradle文件中：
compile("org.springframework.boot:spring-boot-starter-actuator")
将management.security.enabled=false添加到您的application.property文件中
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 ******************