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SpringMVC深度解析

2020-03-16 14:04:34   0  举报

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springmvc源码深度解析

后端开发

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大纲/内容

MEAT-INF/service/

ServletContainerInitializer

SpringServletContainerInitializer

@HandlesTypes(WebApplicationInitializer.class)

onStartup

方法内容

webAppInitializerClasses != null

for (Class<?> waiClass : webAppInitializerClasses)

ReflectionUtils.accessibleConstructor(waiClass).newInstance()

initializers.add((WebApplicationInitializer)

AnnotationAwareOrderComparator.sort(initializers);

initializer.onStartup(servletContext);

super.onStartup(servletContext)

AbstractContextLoaderInitializer

registerContextLoaderListener(servletContext)

createRootApplicationContext()

getRootConfigClasses()

new AnnotationConfigWebApplicationContext()

context.register(configClasses);

return context

new ContextLoaderListener(rootAppContext)

listener.setContextInitializers(getRootApplicationContextInitializers())

getRootApplicationContextInitializers

servletContext.addListener(listener)

registerDispatcherServlet(servletContext)

createServletApplicationContext()

new AnnotationConfigWebApplicationContext()

getServletConfigClasses()

context.register(configClasses)

return context

createDispatcherServlet(servletAppContext)

new DispatcherServlet(servletAppContext)

super(webApplicationContext)

setDispatchOptionsRequest(true)

setContextInitializers(getServletApplicationContextInitializers())

servletContext.addServlet(servletName, dispatcherServlet)

registration.setLoadOnStartup(1)

registration.addMapping(getServletMappings())

setAsyncSupported(isAsyncSupported())

customizeRegistration

校验

!waiClass.isInterface()

!Modifier.isAbstract(waiClass.getModifiers()

WebApplicationInitializer.class.isAssignableFrom(waiClass)

参数

Set<Class<?>> webAppInitializerClasses

ServletContext servletContext

ContextLoader

initWebApplicationContext

this.context == null

ConfigurableWebApplicationContext

!cwac.isActive()

cwac.getParent() == null

loadParentContext(servletContext);

cwac.setParent(parent)

configureAndRefreshWebApplicationContext(cwac, servletContext);

sc.getInitParameter(CONTEXT_ID_PARAM)

idParam != null

wac.setServletContext(sc)

initPropertySources(sc, null);

wac.refresh()

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