SpringBoot中MVC的调用流程

当初始化到RequestMappinghandlerMapping时

HandlerMethod handlerMethod = lookupHandlerMethod

refreshContext

DEFAULT_CONTEXT_CLASS = \"org.springframework.context.annotation.AnnotationConfigApplicationContext\";

HandlerMethod handler =super.getHandlerInternal

initHandlerMethods

HandlerExecutionChain mappedHandler=getHandler(processedRequest)

BootstrapApplicationListener.AncestorInitializer在此时，将父容器注入到子容器中

获取拦截器链，以责任链的方式调用拦截器的preHandle方法

createWithResolvedBean把这个handler的bean（Controller）创建了

DEFAULT_SERVLET_WEB_CONTEXT_CLASS = \"org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext\"

invocableMethod.setHandlerMethodReturnValueHandlers(this.returnValueHandlers);

根据 isHandler(beanType)

BootstrapApplicationListener.onApplicationEvent

detectHandlerMethods(beanName)

浏览器发出请求

applyInitializers

SpringApplicationBuilder.web(WebApplicationType.NONE)

设置WebDataBinderFactory binderFactory 

DispatcherServlet

finishBeanFactoryInitialization

matches.sort(comparator);   Match bestMatch = matches.get(0);找到最合适的

注册你启动时传入的那个Application类的Bean定义

SpringApplication.run

获取WebAsyncManager

SpringApplication.createApplicationContext

invocableMethod.setParameterNameDiscoverer(this.parameterNameDiscoverer);

根据@RequestMapping获取该类的method和path的包装的映射表

根据CorsUtils.isCorsRequest(request)进行Cors处理

开始调父类AbstractHandlerMethodMapping

afterPropertiesSet

处理完注册后，MappingRegistry根据@CrossOrigin处理跨域initCorsConfiguration

以持有实例化的Controller的HandlerMethod作为handler进行创建HandlerExecutionChain

设置参数解析器HandlerMethodArgumentResolverComposite

注册一个ApplicationConversionService

从三种适配器（RequestMappingHandlerAdapter，HttpRequestHandlerAdapter，SimpleControllerHandlerAdapter）中选择一种适配器，注解@Controller形式默认是RequestMappingHandlerAdapter

addAncestorInitializer

SpringApplication.createApplicationContext();

prepareContext

设置返回值解析器HandlerMethodReturnValueHandlerComposite

postProcessApplicationContext

doDispatch

对所有的Bean进行映射处理

把初始化好的上下文放入始祖初始监听器里，用于将父容器注入到子容器

Spring加载bean的那一套，暂时忽略

创建父容器

refreshContext()

找到所有匹配的RequestMappingInfo

SimpleApplicationEventMulticaste.invokeListener

handlerMethodsInitialized(getHandlerMethods())

load

invocableMethod.setHandlerMethodArgumentResolvers(this.argumentResolvers);

prepareEnvironment

HandlerExecutionChain handler = RequestMappingHandlerMappin.getHandler(request)

HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());

ForEach：processCandidateBean

创建子容器

把上一步得到的映射表，遍历包装注册到mappingRegistry里，供使用时返回chain

直到