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Spring MVC源码实现

2025-08-11 15:37:30   1  举报

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Spring MVC源码实现

Spring MVC源码

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DispatcherServlet的工作大致可以分为两个部分

HttpServletBean#init

ServletConfigPropertyValues#ServletConfigPropertyValues

HttpServletBean#initBeanWrapper

HttpServletBean#initServletBean

FrameworkServlet#initServletBean

FrameworkServlet#initWebApplicationContext

WebApplicationContextUtils#getWebApplicationContext()

getWebApplicationContext(sc, WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE)

FrameworkServlet#configureAndRefreshWebApplicationContext

FrameworkServlet#postProcessWebApplicationContext

FrameworkServlet#applyInitializers

AbstractApplicationContext#refresh

FrameworkServlet#findWebApplicationContext

WebApplicationContextUtils#getWebApplicationContext()

FrameworkServlet#createWebApplicationContext()

BeanUtils#instantiateClass()

wac.setParent(parent);

FrameworkServlet#configureAndRefreshWebApplicationContext

DispatcherServlet#onRefresh

启动整个Spring MVC框架的初始化 Spring MVC 的九大组件的初始化

DispatcherServlet#initStrategies

DispatcherServlet#initMultipartResolver

DispatcherServlet#initLocaleResolver(context);

DispatcherServlet#initThemeResolver(context);

DispatcherServlet#initHandlerMappings(context);

BeanFactoryUtils#beansOfTypeIncludingAncestors()

context.getBean("handlerMapping", HandlerMapping.class)

DispatcherServlet#getDefaultStrategies

DispatcherServlet#initHandlerAdapters(context);

DispatcherServlet#initHandlerExceptionResolvers(context);

DispatcherServlet#initRequestToViewNameTranslator(context);

DispatcherServlet#initViewResolvers(context);

DispatcherServlet#initFlashMapManager(context);

this.getServletContext().setAttribute(attrName, wac);

HttpServlet#doPost

FrameworkServlet#doPost

FrameworkServlet#processRequest

DispatcherServlet#doService

对HTTP请求参数进行快照处理

DispatcherServlet#doDispatch

HandlerExecutionChain=DispatcherServlet#getHandler

使用HandlerMapping完成请求的映射处理

AbstractHandlerMapping#getHandler

AbstractUrlHandlerMapping#getHandlerInternal(request)

AbstractHandlerMapping#initLookupPath(request)

AbstractUrlHandlerMapping#lookupHandler(path,lookupPath, request)

AbstractHandlerMapping#getDefaultHandler()

ApplicationObjectSupport#obtainApplicationContext()

AbstractApplicationContext#getBean(handlerName)

AbstractHandlerMapping#getHandlerExecutionChain(handler, request)

DispatcherServlet#getHandlerAdapter

HandlerExecutionChain#applyPreHandle

for(int i = 0; i < this.interceptorList.size(); this.interceptorIndex = i++) {

interceptor.preHandle(request, response, this.handler)

AbstractHandlerMethodAdapter#handle

RequestMappingHandlerAdapter#handleInternal

RequestMappingHandlerAdapter#invokeHandlerMethod

ServletInvocableHandlerMethod#invokeAndHandle

DispatcherServlet#applyDefaultViewName

HandlerExecutionChain#applyPostHandle

for(int i = this.interceptorList.size() - 1; i >= 0; --i)

interceptor.postHandle(request, response, this.handler, mv)

DispatcherServlet#processDispatchResult

DispatcherServlet#processHandlerException

DispatcherServlet#render

AbstractLocaleContextResolver#resolveLocale

DispatcherServlet#resolveViewName

BeanNameViewResolver#resolveViewName

AbstractView#render

DispatcherServlet#triggerAfterCompletion

DispatcherServlet#cleanupMultipart

SimpleUrlHandlerMapping注册过程

SimpleUrlHandlerMapping#initApplicationContext

AbstractHandlerMapping#initApplicationContext

AbstractHandlerMapping#extendInterceptors

AbstractHandlerMapping#detectMappedInterceptors

AbstractHandlerMapping#initInterceptors

SimpleUrlHandlerMapping#registerHandlers

AbstractUrlHandlerMapping#registerHandler()

resolvedHandler = applicationContext.getBean(handlerName)

urlPath.equals("/")

AbstractUrlHandlerMapping#setRootHandler

urlPath.equals("/*")

AbstractHandlerMapping#setDefaultHandler

handlerMap.put(urlPath, resolvedHandler)

Spring Web容器中的上下文设计

XmlWebApplicationContext中IoC容器的具体启动过程

XmlWebApplicationContext#loadBeanDefinitions(beanFactory)

XmlBeanDefinitionReader#XmlBeanDefinitionReader(beanFactory)

beanDefinitionReader.setResourceLoader(this)

XmlWebApplicationContext#initBeanDefinitionReader(beanDefinitionReader)

XmlWebApplicationContext#loadBeanDefinitions(beanDefinitionReader)

AbstractRefreshableWebApplicationContext#getConfigLocations

XmlWebApplicationContext#getDefaultConfigLocations

new String[]{"/WEB-INF/applicationContext.xml"

AbstractBeanDefinitionReader#loadBeanDefinitions(configLocation)

在Web应用程序启动时载入IOC容器(或者称为WebApplicationContext)

ContextLoaderListener#contextInitialized(ServletContextEvent)

开始对WebApplicationContext进行初始化

ContextLoader#initWebApplicationContext(servletContext)

ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE = WebApplicationContext.class.getName() + ".ROOT"

ContextLoader#createWebApplicationContext(servletContext)

ContextLoader#determineContextClass

ApplicationContext#getInitParameter("contextClass")

defaultStrategies.getProperty(WebApplicationContext.class.getName())

BeanUtils#instantiateClass()

ContextLoader#loadParentContext(servletContext)

ContextLoader#configureAndRefreshWebApplicationContext

设置servletContext以及配置文件的位置参数

setServletContext

setConfigLocation

StandardServletEnvironment#initPropertySources

WebApplicationContextUtils#initServletPropertySources()

ContextLoader#customizeContext

AbstractApplicationContext#refresh

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