1.Aware接口
Aware接口是為了使bean能夠感知到自身的一些屬性，例如BeanNameAware接口是為了讓自身Bean能夠感知到，獲取到自身在Spring容器中的id屬性；ApplicationContextAware接口能夠獲取到ApplicationContext，實現了BeanFactoryAware接口的類能夠獲取到BeanFactory對象。
實際上實現了Aware接口相當於你可以在初始化的過程中自動的獲取一些信息。
例如：
package com.xm.ggn.interceptor; import org.springframework.beans.BeansException; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.BeanNameAware; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; @Component public class MyNameService implements BeanNameAware, ApplicationContextAware, BeanFactoryAware { private String beanName; private BeanFactory factory; private ApplicationContext applicationContext; @Override public void setBeanName(String s) { System.out.println("===setBeanName===" + s); this.beanName = s; } @Override public void setBeanFactory(BeanFactory beanFactory) throws BeansException { System.out.println("===setBeanFactory===" + beanFactory); this.factory = beanFactory; } public String getBeanName() { return beanName; } public BeanFactory getFactory() { return factory; } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { System.out.println("===applicationContext===" + applicationContext); this.applicationContext = applicationContext; } public ApplicationContext getApplicationContext() { return applicationContext; } public void setFactory(BeanFactory factory) { this.factory = factory; } }
測試代碼：
package com.zd.bx; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.test.context.junit4.SpringRunner; import com.xm.ggn.MediaApplication; import com.xm.ggn.interceptor.MyNameService; @RunWith(SpringRunner.class) @SpringBootTest(classes = MediaApplication.class) @ServletComponentScan("com") public class BxApplicationTests { @Autowired private MyNameService myNameService; @Test public void test() { System.out.println(myNameService.getBeanName()); System.out.println(myNameService.getApplicationContext()); System.out.println(myNameService.getFactory()); } }
結果：
===setBeanName===myNameService ===setBeanFactory===org.springframework.beans.factory.support.DefaultListableBeanFactory@94f6bfb: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,org.springframework.boot.test.context.ImportsContextCustomizer$ImportsCleanupPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor$SpyPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor,mediaApplication,org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory,MVCConfig,springConfig,uploadFileConfig,mybatisPlusConfig,redisCacheConfig,dictionaryController,loginController,userController,BXExceptionHandler,myInterceptor,myNameService,contextRefreshedEventListener,dictionartServiceImpl,tokenServiceImpl,userServiceImpl,redisUtils,springBootUtils,servletComponentRegisteringPostProcessor,multipartConfigElement,org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration,org.springframework.transaction.config.internalTransactionAdvisor,transactionAttributeSource,transactionInterceptor,org.springframework.transaction.config.internalTransactionalEventListenerFactory,sqlSessionFactoryBean,transactionManager,paginationInterceptor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.cache.annotation.ProxyCachingConfiguration,org.springframework.cache.config.internalCacheAdvisor,cacheOperationSource,cacheInterceptor,scopedTarget.cacheManager,cacheManager,myCacheResolver,redisTemplate,keyGenerator,redisMessageListenerContainer,org.springframework.boot.autoconfigure.AutoConfigurationPackages,org.springframework.boot.autoconfigure.domain.EntityScanPackages,org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,propertySourcesPlaceholderConfigurer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$TomcatWebSocketConfiguration,websocketServletWebServerCustomizer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat,tomcatServletWebServerFactory,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,servletWebServerFactoryCustomizer,tomcatServletWebServerFactoryCustomizer,org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor,org.springframework.boot.context.internalConfigurationPropertiesBinderFactory,org.springframework.boot.context.internalConfigurationPropertiesBinder,org.springframework.boot.context.properties.BoundConfigurationProperties,org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator,org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata,server-org.springframework.boot.autoconfigure.web.ServerProperties,webServerFactoryCustomizerBeanPostProcessor,errorPageRegistrarBeanPostProcessor,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration,dispatcherServlet,spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration,dispatcherServletRegistration,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,taskExecutorBuilder,applicationTaskExecutor,spring.task.execution-org.springframework.boot.autoconfigure.task.TaskExecutionProperties,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration,error,beanNameViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration,conventionErrorViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,errorAttributes,basicErrorController,errorPageCustomizer,preserveErrorControllerTargetClassPostProcessor,spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration,requestMappingHandlerAdapter,requestMappingHandlerMapping,welcomePageHandlerMapping,mvcConversionService,mvcValidator,mvcContentNegotiationManager,mvcPathMatcher,mvcUrlPathHelper,viewControllerHandlerMapping,beanNameHandlerMapping,routerFunctionMapping,resourceHandlerMapping,mvcResourceUrlProvider,defaultServletHandlerMapping,handlerFunctionAdapter,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,mvcViewResolver,mvcHandlerMappingIntrospector,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter,defaultViewResolver,viewResolver,requestContextFilter,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,formContentFilter,org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari,dataSource,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$PooledDataSourceConfiguration,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration$HikariPoolDataSourceMetadataProviderConfiguration,hikariPoolDataSourceMetadataProvider,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializationConfiguration,dataSourceInitializerPostProcessor,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$MapperScannerRegistrarNotFoundConfiguration,dictionaryMapper,userMapper,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration,sqlSessionTemplate,mybatis-plus-com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusProperties,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration$CglibAutoProxyConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration,applicationAvailability,org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration,openEntityManagerInViewInterceptor,openEntityManagerInViewInterceptorConfigurer,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration,jpaVendorAdapter,entityManagerFactoryBuilder,entityManagerFactory,spring.jpa.hibernate-org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties,spring.jpa-org.springframework.boot.autoconfigure.orm.jpa.JpaProperties,dataSourceInitializedPublisher,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration,lettuceClientResources,redisConnectionFactory,org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,stringRedisTemplate,spring.redis-org.springframework.boot.autoconfigure.data.redis.RedisProperties,org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration,lifecycleProcessor,spring.lifecycle-org.springframework.boot.autoconfigure.context.LifecycleProperties,org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,persistenceExceptionTranslationPostProcessor,org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,entityManagerFactoryBootstrapExecutorCustomizer,emBeanDefinitionRegistrarPostProcessor,jpaMappingContext,jpaContext,org.springframework.data.jpa.util.JpaMetamodelCacheCleanup,org.springframework.data.jpa.repository.support.JpaEvaluationContextExtension,org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,reactiveRedisTemplate,reactiveStringRedisTemplate,org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,keyValueMappingContext,redisCustomConversions,redisReferenceResolver,redisConverter,redisKeyValueAdapter,redisKeyValueTemplate,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration,standardJacksonObjectMapperBuilderCustomizer,spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperBuilderConfiguration,jacksonObjectMapperBuilder,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$ParameterNamesModuleConfiguration,parameterNamesModule,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperConfiguration,jacksonObjectMapper,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,jsonComponentModule,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration,stringHttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration,mappingJackson2HttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,messageConverters,org.springframework.data.web.config.ProjectingArgumentResolverRegistrar,projectingArgumentResolverBeanPostProcessor,org.springframework.data.web.config.SpringDataWebConfiguration,pageableResolver,sortResolver,org.springframework.data.web.config.SpringDataJacksonConfiguration,jacksonGeoModule,org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,pageableCustomizer,sortCustomizer,spring.data.web-org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties,org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateConfiguration,jdbcTemplate,org.springframework.boot.autoconfigure.jdbc.NamedParameterJdbcTemplateConfiguration,namedParameterJdbcTemplate,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,spring.jdbc-org.springframework.boot.autoconfigure.jdbc.JdbcProperties,org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,spring.security.oauth2.resourceserver-org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2ResourceServerProperties,org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,taskSchedulerBuilder,spring.task.scheduling-org.springframework.boot.autoconfigure.task.TaskSchedulingProperties,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration$DataSourceTransactionManagerConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$TransactionTemplateConfiguration,transactionTemplate,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,platformTransactionManagerCustomizers,spring.transaction-org.springframework.boot.autoconfigure.transaction.TransactionProperties,org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,restTemplateBuilder,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$TomcatWebServerFactoryCustomizerConfiguration,tomcatWebServerFactoryCustomizer,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,characterEncodingFilter,localeCharsetMappingsCustomizer,org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,multipartResolver,spring.servlet.multipart-org.springframework.boot.autoconfigure.web.servlet.MultipartProperties,org.springframework.orm.jpa.SharedEntityManagerCreator#0]; root of factory hierarchy ===applicationContext===org.springframework.web.context.support.GenericWebApplicationContext@2f05be7f, started on Wed Jul 15 21:49:01 CST 2020 myNameService org.springframework.web.context.support.GenericWebApplicationContext@2f05be7f, started on Wed Jul 15 21:49:01 CST 2020 org.springframework.beans.factory.support.DefaultListableBeanFactory@94f6bfb: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,org.springframework.boot.test.context.ImportsContextCustomizer$ImportsCleanupPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor$SpyPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor,mediaApplication,org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory,MVCConfig,springConfig,uploadFileConfig,mybatisPlusConfig,redisCacheConfig,dictionaryController,loginController,userController,BXExceptionHandler,myInterceptor,myNameService,contextRefreshedEventListener,dictionartServiceImpl,tokenServiceImpl,userServiceImpl,redisUtils,springBootUtils,servletComponentRegisteringPostProcessor,multipartConfigElement,org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration,org.springframework.transaction.config.internalTransactionAdvisor,transactionAttributeSource,transactionInterceptor,org.springframework.transaction.config.internalTransactionalEventListenerFactory,sqlSessionFactoryBean,transactionManager,paginationInterceptor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.cache.annotation.ProxyCachingConfiguration,org.springframework.cache.config.internalCacheAdvisor,cacheOperationSource,cacheInterceptor,scopedTarget.cacheManager,cacheManager,myCacheResolver,redisTemplate,keyGenerator,redisMessageListenerContainer,org.springframework.boot.autoconfigure.AutoConfigurationPackages,org.springframework.boot.autoconfigure.domain.EntityScanPackages,org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,propertySourcesPlaceholderConfigurer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$TomcatWebSocketConfiguration,websocketServletWebServerCustomizer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat,tomcatServletWebServerFactory,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,servletWebServerFactoryCustomizer,tomcatServletWebServerFactoryCustomizer,org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor,org.springframework.boot.context.internalConfigurationPropertiesBinderFactory,org.springframework.boot.context.internalConfigurationPropertiesBinder,org.springframework.boot.context.properties.BoundConfigurationProperties,org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator,org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata,server-org.springframework.boot.autoconfigure.web.ServerProperties,webServerFactoryCustomizerBeanPostProcessor,errorPageRegistrarBeanPostProcessor,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration,dispatcherServlet,spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration,dispatcherServletRegistration,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,taskExecutorBuilder,applicationTaskExecutor,spring.task.execution-org.springframework.boot.autoconfigure.task.TaskExecutionProperties,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration,error,beanNameViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration,conventionErrorViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,errorAttributes,basicErrorController,errorPageCustomizer,preserveErrorControllerTargetClassPostProcessor,spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration,requestMappingHandlerAdapter,requestMappingHandlerMapping,welcomePageHandlerMapping,mvcConversionService,mvcValidator,mvcContentNegotiationManager,mvcPathMatcher,mvcUrlPathHelper,viewControllerHandlerMapping,beanNameHandlerMapping,routerFunctionMapping,resourceHandlerMapping,mvcResourceUrlProvider,defaultServletHandlerMapping,handlerFunctionAdapter,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,mvcViewResolver,mvcHandlerMappingIntrospector,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter,defaultViewResolver,viewResolver,requestContextFilter,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,formContentFilter,org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari,dataSource,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$PooledDataSourceConfiguration,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration$HikariPoolDataSourceMetadataProviderConfiguration,hikariPoolDataSourceMetadataProvider,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializationConfiguration,dataSourceInitializerPostProcessor,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$MapperScannerRegistrarNotFoundConfiguration,dictionaryMapper,userMapper,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration,sqlSessionTemplate,mybatis-plus-com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusProperties,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration$CglibAutoProxyConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration,applicationAvailability,org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration,openEntityManagerInViewInterceptor,openEntityManagerInViewInterceptorConfigurer,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration,jpaVendorAdapter,entityManagerFactoryBuilder,entityManagerFactory,spring.jpa.hibernate-org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties,spring.jpa-org.springframework.boot.autoconfigure.orm.jpa.JpaProperties,dataSourceInitializedPublisher,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration,lettuceClientResources,redisConnectionFactory,org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,stringRedisTemplate,spring.redis-org.springframework.boot.autoconfigure.data.redis.RedisProperties,org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration,lifecycleProcessor,spring.lifecycle-org.springframework.boot.autoconfigure.context.LifecycleProperties,org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,persistenceExceptionTranslationPostProcessor,org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,entityManagerFactoryBootstrapExecutorCustomizer,emBeanDefinitionRegistrarPostProcessor,jpaMappingContext,jpaContext,org.springframework.data.jpa.util.JpaMetamodelCacheCleanup,org.springframework.data.jpa.repository.support.JpaEvaluationContextExtension,org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,reactiveRedisTemplate,reactiveStringRedisTemplate,org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,keyValueMappingContext,redisCustomConversions,redisReferenceResolver,redisConverter,redisKeyValueAdapter,redisKeyValueTemplate,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration,standardJacksonObjectMapperBuilderCustomizer,spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperBuilderConfiguration,jacksonObjectMapperBuilder,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$ParameterNamesModuleConfiguration,parameterNamesModule,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperConfiguration,jacksonObjectMapper,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,jsonComponentModule,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration,stringHttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration,mappingJackson2HttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,messageConverters,org.springframework.data.web.config.ProjectingArgumentResolverRegistrar,projectingArgumentResolverBeanPostProcessor,org.springframework.data.web.config.SpringDataWebConfiguration,pageableResolver,sortResolver,org.springframework.data.web.config.SpringDataJacksonConfiguration,jacksonGeoModule,org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,pageableCustomizer,sortCustomizer,spring.data.web-org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties,org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateConfiguration,jdbcTemplate,org.springframework.boot.autoconfigure.jdbc.NamedParameterJdbcTemplateConfiguration,namedParameterJdbcTemplate,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,spring.jdbc-org.springframework.boot.autoconfigure.jdbc.JdbcProperties,org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,spring.security.oauth2.resourceserver-org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2ResourceServerProperties,org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,taskSchedulerBuilder,spring.task.scheduling-org.springframework.boot.autoconfigure.task.TaskSchedulingProperties,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration$DataSourceTransactionManagerConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$TransactionTemplateConfiguration,transactionTemplate,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,platformTransactionManagerCustomizers,spring.transaction-org.springframework.boot.autoconfigure.transaction.TransactionProperties,org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,restTemplateBuilder,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$TomcatWebServerFactoryCustomizerConfiguration,tomcatWebServerFactoryCustomizer,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,characterEncodingFilter,localeCharsetMappingsCustomizer,org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,multipartResolver,spring.servlet.multipart-org.springframework.boot.autoconfigure.web.servlet.MultipartProperties,org.springframework.orm.jpa.SharedEntityManagerCreator#0]; root of factory hierarchy
2.BeanFactory和FactoryBean區別
BeanFactory是個Factory，也就是IOC容器或對象工廠，FactoryBean是個Bean。在Spring中，所有的Bean都是由BeanFactory(也就是IOC容器)來進行管理的。但對FactoryBean而言，這個Bean不是簡單的Bean，而是一個能生產或者修飾對象生成的工廠Bean,它的實現與設計模式中的工廠模式和修飾器模式類似。
用戶使用容器時，可以使用轉義符"&" 來得到FactoryBean 本身，用來區分FacrotyBean產生的對象和FactoryBean本身。舉例來說，如果myJndiObject是一個FactoryBean，那么使用&myJndiObject 得到的是FactoryBean而不是myJndiObject 這個FactoryBean產生出來的對象。可以參考BeanFactory的源碼：
public interface BeanFactory { String FACTORY_BEAN_PREFIX = "&"; Object getBean(String var1) throws BeansException; <T> T getBean(String var1, Class<T> var2) throws BeansException; Object getBean(String var1, Object... var2) throws BeansException; <T> T getBean(Class<T> var1) throws BeansException; <T> T getBean(Class<T> var1, Object... var2) throws BeansException; <T> ObjectProvider<T> getBeanProvider(Class<T> var1); <T> ObjectProvider<T> getBeanProvider(ResolvableType var1); boolean containsBean(String var1); boolean isSingleton(String var1) throws NoSuchBeanDefinitionException; boolean isPrototype(String var1) throws NoSuchBeanDefinitionException; boolean isTypeMatch(String var1, ResolvableType var2) throws NoSuchBeanDefinitionException; boolean isTypeMatch(String var1, Class<?> var2) throws NoSuchBeanDefinitionException; @Nullable Class<?> getType(String var1) throws NoSuchBeanDefinitionException; @Nullable Class<?> getType(String var1, boolean var2) throws NoSuchBeanDefinitionException; String[] getAliases(String var1); }
1. BeanFactory
從名字就可以看出來是一個工廠，是IOC容器的底層實現接口，ApplicationContex接口對BeanFactory（是一個子接口）進行了擴展，在BeanFactory的基礎上添加了其他功能，比如與Spring的AOP更容易集成，也提供了處理message resource的機制（用於國際化）、事件傳播以及應用層的特別配置，比如針對Web應用的WebApplicationContext。
org.springframework.beans.factory.BeanFactory 是Spring IoC容器的具體實現，用來包裝和管理各種bean。BeanFactory接口是Spring IoC 容器的核心接口。
常見的ApplicationContext實現類如下：
(1)ClassPathXmlApplicationContext：從classpath的XML配置文件中讀取上下文，並生成上下文定義。應用程序上下文從程序環境變量中
ApplicationContext context = new ClassPathXmlApplicationContext(“bean.xml”);
(2)FileSystemXmlApplicationContext ：由文件系統中的XML配置文件讀取上下文。
ApplicationContext context = new FileSystemXmlApplicationContext(“bean.xml”);
(3)XmlWebApplicationContext：由Web應用的XML文件讀取上下文。
(4)AnnotationConfigApplicationContext(基於Java配置啟動容器)
2.FactoryBean
是spirng提供的工廠bean的一個接口。查看源碼：
public interface FactoryBean<T> { String OBJECT_TYPE_ATTRIBUTE = "factoryBeanObjectType"; @Nullable T getObject() throws Exception; @Nullable Class<?> getObjectType(); default boolean isSingleton() { return true; } }
getObject返回具體的對象，getObjectType返回其calss；isSingleton標記是否是單例模式。JDK用default函數標記默認是單例。
當我們獲取對象的時候用myNameServiceFactoryBean獲取的是工廠生成的bean；&myNameServiceFactoryBean 獲取的是工廠bean自身。
例如：
package com.xm.ggn.interceptor; import org.springframework.beans.factory.FactoryBean; import org.springframework.stereotype.Component; @Component public class MyNameServiceFactoryBean implements FactoryBean<MyNameService> { /** * 返回工廠生產的對象 */ @Override public MyNameService getObject() throws Exception { MyNameService myNameService = new MyNameService(); return myNameService; } @Override public Class<MyNameService> getObjectType() { return MyNameService.class; } }
測試代碼：
package com.zd.bx; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.context.ApplicationContext; import org.springframework.test.context.junit4.SpringRunner; import com.xm.ggn.MediaApplication; @RunWith(SpringRunner.class) @SpringBootTest(classes = MediaApplication.class) @ServletComponentScan("com") public class BxApplicationTests { @Autowired private ApplicationContext applcationContext; @Test public void test() { System.out.println("============"); // 獲取工廠生成的對象 System.out.println(applcationContext.getBean("myNameServiceFactoryBean")); // 獲取工廠自身bean System.out.println(applcationContext.getBean("&myNameServiceFactoryBean")); } }
結果：
============
com.xm.ggn.interceptor.MyNameService@6461c673
com.xm.ggn.interceptor.MyNameServiceFactoryBean@6715a6da
當然可以根據class獲取，如下：
System.out.println("============");
// 獲取工廠生成的對象
System.out.println(applcationContext.getBean(MyNameService.class));
// 獲取工廠自身bean
System.out.println(applcationContext.getBean(MyNameServiceFactoryBean.class));