SpringBoot源码解析

2024-03-12 11:38:15   0  举报

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Spring Boot源码解析，这是一段深入探讨Spring Boot框架内部结构和工作原理的内容。Spring Boot作为Java开发者广泛使用的微服务框架，其源码解析对于理解Spring Boot的底层实现和优化应用具有重要价值。通过阅读此源码解析，您将了解Spring Boot的核心组件、启动过程、自动配置机制以及各种扩展点等，从而更好地使用Spring Boot进行应用程序开发。

java

SpringBoot

Spring

作者其他创作

大纲/内容

tomcat.setBaseDir(baseDir.getAbsolutePath())

DefaultPropertiesPropertySource.moveToEnd(environment)

doWithListeners(\"spring.boot.application.context-loaded\

ExistingWebApplicationScopes existingScopes = new ExistingWebApplicationScopes(getBeanFactory())

lifecycleProcessorLifecycleProcessor.classDefaultLifecycleProcessor()

beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this))

factory = getWebServerFactory()

bootstrapContext.close(context)

System.setProperty(SYSTEM_PROPERTY_JAVA_AWT_HEADLESS

initMessageSource()

this.log = log;this.listeners = new ArrayList<>(listeners);this.applicationStartup = applicationStartup

abstract class AbstractApplicationContext extends DefaultResourceLoader implements ConfigurableApplicationContext

getApplicationEventMulticaster().addApplicationListener(listener)

getApplicationEventMulticaster().addApplicationListenerBean(listenerBeanName)

postProcessApplicationContext(context)

class SpringApplicationRunListeners

this.bootstrappersinitializer.intitialize

ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory()

contextRefresh = this.applicationStartup.start(\"spring.context.refresh\")

step = this.applicationStartup.start(stepName)

createWebServer()

clearResourceCaches()

invokeBeanFactoryPostProcessors(beanFactory)

prepareRefresh()

listeners.started(context)

stopWatch.stop()

initPropertySources()

this.listeners.forEach(listenerAction)

stepAction.accept(step)

context = createApplicationContext()

WebApplicationContextUtils.registerWebApplicationScopes(getBeanFactory())

getTomcatWebServer(tomcat)

configureEngine(tomcat.getEngine())

class ServletWebServerApplicationContext extends GenericWebApplicationContext implements ConfigurableWebServerApplicationContext

initLifecycleProcessor()

CachedIntrospectionResults.clearClassLoader(getClassLoader())

environment = getOrCreateEnvironment()

createWebServer.end()

beanPostProcess = this.applicationStartup.start(\"spring.context.beans.post-process\")

registerBeanPostProcessors(beanFactory)

SpringBoot源码解析

beanFactory.setBeanExpressionResolver(new StandardBeanExpressionResolver(beanFactory.getBeanClassLoader()))

resetCommonCaches()

stopWatch.start()

new SpringApplication(primarySources)

baseDir = (this.baseDirectory != null) ? this.baseDirectory : createTempDir(\"tomcat\")

super.postProcessBeanFactory(beanFactory)

beanFactory.setConversionService

prepareBeanFactory(beanFactory)

beanPostProcess.end()

finishRefresh()

refresh((ApplicationContext) context)

contextRefresh.end()

this.bootstrappers = new ArrayList<>(getSpringFactoriesInstances(Bootstrapper.class));setInitializers((Collection) getSpringFactoriesInstances(ApplicationContextInitializer.class));setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class));this.mainApplicationClass = deduceMainApplicationClass()

ResolvableType.clearCache()

doWithListeners(\"spring.boot.application.starting\

existingScopes.restore()

this.webApplicationType = WebApplicationType.deduceFromClasspath()

tomcat = new Tomcat()

super.onRefresh()

connector = new Connector(this.protocol)

context.registerShutdownHook()

super.refresh()

getApplicationEventMulticaster().multicastEvent(earlyEvent)

SpringApplicationRunListeners listeners = getRunListeners(args)

publishEvent(new ContextRefreshedEvent(this))

Banner printedBanner = printBanner(environment)

listeners.contextPrepared(context)

run(args)

doWithListeners(\"spring.boot.application.started\

ConfigurationPropertySources.attach(environment)

class AnnotationConfigServletWebServerApplicationContext extends ServletWebServerApplicationContext implements AnnotationConfigRegistry

registerWebApplicationScopes()

this.resourceLoader = resourceLoader;this.primarySources = new LinkedHashSet<>(Arrays.asList(primarySources))

listeners.running(context)

DefaultBootstrapContext bootstrapContext = createBootstrapContext()

this.applicationContextFactory.create(this.webApplicationType)

doWithListeners(\"spring.boot.application.context-prepared\

getLifecycleProcessor().onRefresh()

switch (webApplicationType) {case SERVLET: return new AnnotationConfigServletWebServerApplicationContext();case REACTIVE: return new AnnotationConfigReactiveWebServerApplicationContext();default: return new AnnotationConfigApplicationContext();

context.setEnvironment(environment)

beanFactory.preInstantiateSingletons()

beanFactory.addEmbeddedValueResolver

customizeConnector(connector)

themeSourceHierarchicalThemeSource()DelegatingThemeSource()ResourceBundleThemeSource()

onRefresh()

Set<Object> sources = getAllSources()

configureAdditionalProfiles(environment)

refresh((ConfigurableApplicationContext) applicationContext)

listeners.contextLoaded(context)

beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this))

refreshContext(context)