@Autowired可以注入ApplicationContext

深藏阁楼爱情的钟 2023-07-22 03:44 3阅读 0赞

## 问题： ##

## **为何@Autowired可以注入ApplicationContext？** ##

## 获取applicationContext的方式(前提是注入applicationContext的一定是交给spring容器处理的bean)： ##

1：

@Autowired
      ApplicationContext applicationContext;

2：

@Component
    public class SpringContextUtils implements ApplicationContextAware { 
    	private static ApplicationContext applicationContext;
    
    	public void setApplicationContext(ApplicationContext context) { 
    		applicationContext = context;
    	}
    
    	public static ApplicationContext getApplicationContext() { 
    		if (applicationContext == null)
    			throw new IllegalStateException(
    					"applicaitonContext未注入,请在applicationContext.xml中定义SpringContextUtil");
    		return applicationContext;
    	}
    
    	public static Object getBean(String name) { 
    		return applicationContext.getBean(name);
    	}
    }

@Component
    public class NewSpringContextUtils extends WebApplicationObjectSupport { 
    	
    	public Object getBean(String name){ 
    		return this.getApplicationContext().getBean(name);
    	}
    	public <T> T  getBean(Class<T> className){ 
    		return this.getApplicationContext().getBean(className);
    	}
    	public WebApplicationContext getWebApplicationContexts(){ 
    		return this.getWebApplicationContext();
    	}
    }

import org.springframework.context.support.ApplicationObjectSupport;
    public class NewSpringContextUtils  extends ApplicationObjectSupport{ 
    	public Object getBean(String name){ 
    		return this.getApplicationContext().getBean(name);
    	}
    	public <T> T  getBean(Class<T> className){ 
    		return this.getApplicationContext().getBean(className);
    	}
    }

## 区别：一个耦合了接口一个耦合了注解 ##

## 为什么需要注入这个ApplicationContext对象呢？ ##

类A(单例的)需要注入一个类B（原型的）

比如你在A类当中的m()方法中返回b，那么无论你调用多少次a.m()；返回的都是同一个b对象；就违背b的原型规则，应该在m方法中每次都返回一个新的b；所以某些场景下b不能直接注入；

## 错误： ##

@Component
    public class A{ 
    	
    	//注意B是原型的 scope=prototype 	@Autowried;
    	B b;
    	public B m(){ 
    
    		//直接返回注入进来的b；肯定有问题 		//返回的永远是A实例化的时候注入的那个bean 		//违背的B设计成原型的初衷 		return b；
    	}
    }

## 正确： ##

@Component
    public class A{ 
    	@Autowired
    	ApplicationContext applicationContext;
    	public B m(){ 
    		//每次调用m都是通过spring容器去获取b 		//如果b是原型，每次拿到的都是原型b 		B b= applicationContext.getBean("b");
    		return b;
    	}
    }

## 如何查看ApplicationContext 这个对象是否存在spring容器当中？ ##

import lombok.extern.slf4j.Slf4j;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cache.annotation.EnableCaching;
    import org.springframework.context.ApplicationContext;
    
    /** * SprintBootApplication */
    @Slf4j
    @SpringBootApplication
    @EnableCaching
    public class BootApplication { 
    
        public static void main(String[] args) { 
            ApplicationContext context = SpringApplication.run(BootApplication.class, args);
            String serverPort = context.getEnvironment().getProperty("server.port");
            Home("mblog started at http://localhost:" + serverPort);
            String[] beanDefinitionNames = context.getBeanDefinitionNames();
            //打印spring容器当中所有bean的bd         for (String beanDefinitionName : beanDefinitionNames) { 
                System.out.println(beanDefinitionName);
            }
        }
    
    }

## spring当中所有的bean输出（结果是不在）： ##

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
    bootApplication
    org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory
    storageFactory
    aliyunStorageImpl
    nativeStorageImpl
    qiniuStorageImpl
    upYunStorageImpl
    springUtils
    contextStartup
    shiroConfiguration
    siteConfiguration
    siteOptions
    webMvcConfiguration
    hibernateFilterAspect
    messageEventHandler
    postUpdateEventHandler
    interceptorHookManager
    hidenContentPugin
    viewCopyrightPugin
    channelServiceImpl
    commentServiceImpl
    favoriteServiceImpl
    linksServiceImpl
    mailServiceImpl
    messageServiceImpl
    openOauthServiceImpl
    optionsServiceImpl
    permissionServiceImpl
    postSearchServiceImpl
    postServiceImpl
    rolePermissionServiceImpl
    roleServiceImpl
    securityCodeServiceImpl
    tagServiceImpl
    userEventServiceImpl
    userRoleServiceImpl
    userServiceImpl
    channelDirective
    contentsDirective
    controlsDirective
    linksDirective
    numberDirective
    resourceDirective
    sidebarDirective
    userCommentsDirective
    userContentsDirective
    userFavoritesDirective
    userMessagesDirective
    adminController
    adminChannelController
    adminCommentController
    optionsController
    permissionController
    adminPostController
    roleController
    themeController
    adminUserController
    apiController
    channelController
    indexController
    searchController
    tagController
    callbackController
    emailController
    forgotController
    loginController
    logoutController
    registerController
    commentController
    postController
    uploadController
    favorController
    settingsController
    usersController
    defaultExceptionHandler
    jsonUtils
    baseInterceptor
    menusDirective
    subjectFactory
    accountRealm
    shiroCacheManager
    shiroFilterFactoryBean
    org.springframework.scheduling.annotation.ProxyAsyncConfiguration
    org.springframework.context.annotation.internalAsyncAnnotationProcessor
    taskExecutor
    fastJsonHttpMessageConverter
    org.springframework.cache.annotation.ProxyCachingConfiguration
    org.springframework.cache.config.internalCacheAdvisor
    cacheOperationSource
    cacheInterceptor
    org.springframework.boot.autoconfigure.AutoConfigurationPackages
    org.springframework.aop.config.internalAutoProxyCreator
    org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration
    org.springframework.boot.autoconfigure.condition.BeanTypeRegistry
    propertySourcesPlaceholderConfigurer
    org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$UndertowWebSocketConfiguration
    websocketServletWebServerCustomizer
    org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration
    org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedUndertow
    undertowServletWebServerFactory
    org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration
    servletWebServerFactoryCustomizer
    server-org.springframework.boot.autoconfigure.web.ServerProperties
    org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor
    org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
    webServerFactoryCustomizerBeanPostProcessor
    errorPageRegistrarBeanPostProcessor
    org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration
    dispatcherServlet
    spring.http-org.springframework.boot.autoconfigure.http.HttpProperties
    spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties
    org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration
    dispatcherServletRegistration
    org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration
    org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration
    taskExecutorBuilder
    spring.task.execution-org.springframework.boot.autoconfigure.task.TaskExecutionProperties
    org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration
    defaultValidator
    methodValidationPostProcessor
    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$WebMvcAutoConfigurationAdapter$FaviconConfiguration
    faviconHandlerMapping
    faviconRequestHandler
    org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration
    requestMappingHandlerAdapter
    requestMappingHandlerMapping
    mvcConversionService
    mvcValidator
    mvcContentNegotiationManager
    mvcPathMatcher
    mvcUrlPathHelper
    viewControllerHandlerMapping
    beanNameHandlerMapping
    resourceHandlerMapping
    mvcResourceUrlProvider
    defaultServletHandlerMapping
    mvcUriComponentsContributor
    httpRequestHandlerAdapter
    simpleControllerHandlerAdapter
    handlerExceptionResolver
    mvcViewResolver
    mvcHandlerMappingIntrospector
    org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter
    defaultViewResolver
    viewResolver
    welcomePageHandlerMapping
    requestContextFilter
    org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration
    hiddenHttpMethodFilter
    formContentFilter
    org.apache.shiro.spring.config.web.autoconfigure.ShiroWebAutoConfiguration
    authenticationStrategy
    authenticator
    authorizer
    subjectDAO
    sessionStorageEvaluator
    sessionFactory
    sessionDAO
    sessionManager
    securityManager
    sessionCookieTemplate
    rememberMeManager
    rememberMeCookieTemplate
    shiroFilterChainDefinition
    org.apache.shiro.spring.boot.autoconfigure.ShiroAutoConfiguration
    org.apache.shiro.spring.boot.autoconfigure.ShiroBeanAutoConfiguration
    lifecycleBeanPostProcessor
    eventBus
    shiroEventBusAwareBeanPostProcessor
    org.apache.shiro.spring.config.web.autoconfigure.ShiroWebFilterConfiguration
    filterShiroFilterRegistrationBean
    org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration
    mbeanExporter
    objectNamingStrategy
    mbeanServer
    org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration
    springApplicationAdminRegistrar
    org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$CglibAutoProxyConfiguration
    org.springframework.boot.autoconfigure.aop.AopAutoConfiguration
    org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration
    org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari
    dataSource
    org.springframework.boot.autoconfigure.jdbc.DataSourceJmxConfiguration$Hikari
    org.springframework.boot.autoconfigure.jdbc.DataSourceJmxConfiguration
    org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$PooledDataSourceConfiguration
    org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration$HikariPoolDataSourceMetadataProviderConfiguration
    hikariPoolDataSourceMetadataProvider
    org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration
    org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker
    org.springframework.boot.autoconfigure.jdbc.DataSourceInitializationConfiguration
    dataSourceInitializerPostProcessor
    org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
    spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties
    org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration$JpaWebMvcConfiguration
    openEntityManagerInViewInterceptor
    org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration
    org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration
    transactionManager
    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.cache.CacheAutoConfiguration$CacheManagerJpaDependencyConfiguration
    org.springframework.boot.autoconfigure.cache.EhCacheCacheConfiguration
    cacheManager
    ehCacheCacheManager
    org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration
    cacheManagerCustomizers
    cacheAutoConfigurationValidator
    spring.cache-org.springframework.boot.autoconfigure.cache.CacheProperties
    org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration
    org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration
    persistenceExceptionTranslationPostProcessor
    org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration
    emBeanDefinitionRegistrarPostProcessor
    jpaMappingContext
    jpaContext
    org.springframework.data.jpa.util.JpaMetamodelCacheCleanup
    linksRepository
    rolePermissionRepository
    postResourceRepository
    channelRepository
    postRepository
    favoriteRepository
    postAttributeRepository
    securityCodeRepository
    roleRepository
    userOauthRepository
    permissionRepository
    commentRepository
    optionsRepository
    resourceRepository
    userRepository
    messageRepository
    tagRepository
    postTagRepository
    userRoleRepository
    org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration
    gsonBuilder
    gson
    standardGsonBuilderCustomizer
    spring.gson-org.springframework.boot.autoconfigure.gson.GsonProperties
    org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$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$MappingJackson2HttpMessageConverterConfiguration
    mappingJackson2HttpMessageConverter
    org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration
    org.springframework.boot.autoconfigure.http.GsonHttpMessageConvertersConfiguration
    org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration
    messageConverters
    org.springframework.data.web.config.ProjectingArgumentResolverRegistrar
    projectingArgumentResolverBeanPostProcessor
    org.springframework.data.web.config.SpringDataWebConfiguration
    pageableResolver
    sortResolver
    org.springframework.data.web.config.SpringDataJacksonConfiguration
    jacksonGeoModule
    org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration
    pageableCustomizer
    sortCustomizer
    spring.data.web-org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties
    org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration$JdbcTemplateConfiguration
    jdbcTemplate
    org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration$NamedParameterJdbcTemplateConfiguration
    namedParameterJdbcTemplate
    org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration
    spring.jdbc-org.springframework.boot.autoconfigure.jdbc.JdbcProperties
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration$FlywayJdbcOperationsDependencyConfiguration
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration$FlywayJpaDependencyConfiguration
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration$FlywayConfiguration$FlywayInitializerJdbcOperationsDependencyConfiguration
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration$FlywayConfiguration$FlywayInitializerJpaDependencyConfiguration
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration$FlywayConfiguration
    flyway
    flywayInitializer
    spring.flyway-org.springframework.boot.autoconfigure.flyway.FlywayProperties
    org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration
    stringOrNumberMigrationVersionConverter
    flywayDefaultDdlModeProvider
    org.springframework.boot.autoconfigure.freemarker.FreeMarkerServletWebConfiguration
    freeMarkerConfigurer
    freeMarkerConfiguration
    freeMarkerViewResolver
    org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration
    spring.freemarker-org.springframework.boot.autoconfigure.freemarker.FreeMarkerProperties
    org.springframework.boot.autoconfigure.h2.H2ConsoleAutoConfiguration
    h2Console
    spring.h2.console-org.springframework.boot.autoconfigure.h2.H2ConsoleProperties
    org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration$LoggingCodecConfiguration
    loggingCodecCustomizer
    org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration$JacksonCodecConfiguration
    jacksonCodecCustomizer
    org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration
    org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration
    spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties
    org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration
    taskSchedulerBuilder
    spring.task.scheduling-org.springframework.boot.autoconfigure.task.TaskSchedulingProperties
    org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration$DataSourceTransactionManagerConfiguration
    org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration
    org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration
    org.springframework.transaction.config.internalTransactionAdvisor
    transactionAttributeSource
    transactionInterceptor
    org.springframework.transaction.config.internalTransactionalEventListenerFactory
    org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$EnableTransactionManagementConfiguration$CglibAutoProxyConfiguration
    org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$EnableTransactionManagementConfiguration
    org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$TransactionTemplateConfiguration
    transactionTemplate
    org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration
    platformTransactionManagerCustomizers
    spring.transaction-org.springframework.boot.autoconfigure.transaction.TransactionProperties
    org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration
    restTemplateBuilder
    org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$UndertowWebServerFactoryCustomizerConfiguration
    org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$UndertowWebServerFactoryCustomizerConfiguration
    undertowWebServerFactoryCustomizer
    org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration
    org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration
    characterEncodingFilter
    localeCharsetMappingsCustomizer
    org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration
    multipartConfigElement
    multipartResolver
    spring.servlet.multipart-org.springframework.boot.autoconfigure.web.servlet.MultipartProperties
    org.springframework.boot.devtools.autoconfigure.DevToolsDataSourceAutoConfiguration$DatabaseShutdownExecutorJpaDependencyConfiguration
    org.springframework.boot.devtools.autoconfigure.DevToolsDataSourceAutoConfiguration
    inMemoryDatabaseShutdownExecutor
    org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration$RestartConfiguration
    classPathFileSystemWatcher
    classPathRestartStrategy
    hateoasObjenesisCacheDisabler
    fileSystemWatcherFactory
    conditionEvaluationDeltaLoggingListener
    org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration$LiveReloadConfiguration
    liveReloadServer
    optionalLiveReloadServer
    liveReloadServerEventListener
    org.springframework.boot.devtools.autoconfigure.LocalDevToolsAutoConfiguration
    spring.devtools-org.springframework.boot.devtools.autoconfigure.DevToolsProperties
    org.springframework.orm.jpa.SharedEntityManagerCreator#0

## 如何查看单例池中是否有这个ApplicationContext对象？ ##

debug
    DefaultSingletonBeanRegistry  addSingleton

![v2-6c816f89cbb3c8f23318729b3e9a10da\_b.jpg][v2-6c816f89cbb3c8f23318729b3e9a10da_b.jpg]

## 在单例池中就可autowired装配： ##

@Autowried这个注解功能的类是 AutowiredAnnotationBeanPostProcessor
    postProcessProperties()方法用来处理属性注入
    metadata.inject(bean, beanName, pvs);属性注入
    
    spring源码有一个ReflectionUtils反射工具类
    他喵的
    是spring新版本支持的嘛？我看源码metadata.inject(bean, beanName, pvs)方法实现里没看见这个
    beanFactory.resolveDependency，我在springboot2.1.2这里看的，没看见实现

说白了没啥区别,都是在后置处理器里注入了ApplicationContext,实现ApplicationContextAware接口是Appli
    cationContextAwareProcessor这个后置处理器里显式的调用setApplication方法注入的,
    而@Autoware也是后置处理器注入,只不过是AutowiredAnnotationBeanPostProcessor这个后置处理器在属性填充
    的时候注入,其实spring百分之80工作都是后置处理器完成的

## 调式项目修改端口号： ##

server:
        port: 8088
        use-forward-headers: true
        undertow:
            io-threads: 2
            worker-threads: 32
            buffer-size: 1024
            directBuffers: true

[v2-6c816f89cbb3c8f23318729b3e9a10da_b.jpg]: https://ss.csdn.net/p?https://pic3.zhimg.com/v2-6c816f89cbb3c8f23318729b3e9a10da_b.jpg