"Spring source learning" Springmvc URL and bean mapping principle and source code parsing

Basic process of "one" mapping

(1) SPRINGMVC configuration map, need to configure <mvc:annotation-driven > </mvc:annotation-driven> in XML configuration file

(2) after configuration, The configuration will be processed by Org.springframework.web.servlet.config.MvcNamespaceHandler and the class will be forwarded to Org.springframework.web.servlet.config.Annotati Ondrivenbeandefinitionparser do the parsing.

(3) When Annotationdrivenbeandefinitionparser is parsed, multiple objects are registered to the IOC container. which has this object org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping

(4) The Requestmappinghandlermapping object invokes the object Afterpropertiesset () method to make a map of the URL and bean when the IOC instantiates the bean phase.

(5) The mapping is to find the bean labeled @controller, @RequestMapping annotations from the IOC, and then reflect all the methods mehod the object and the URL values configured in the annotations are mapped.

(6) The Init () method is called at Org.springframework.web.servlet.DispatcherServlet initialization, and after IOC parsing, AOP is prepared, the initstrategies ( ApplicationContext context) method called inithandlermappings (context). Injects all beans in the IOC that implement the Handlermapping interface into the Dispatcherservlet property list

"Two" <mvc:annotation-driven > </mvc:annotation-driven> configuration, The beans that are registered in the IOC by Annotationdrivenbeandefinitionparser parsing are roughly the following

"1" org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
Property:
Org.springframework.web.accept.ContentNegotiationManagerFactoryBean

"2" Org.springframework.web.bind.support.ConfigurableWebBindingInitializer
Property:
Org.springframework.format.support.FormattingConversionServiceFactoryBean
Org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean

"3" Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter
Property:
ContentNegotiationManager:org.springframework.web.accept.ContentNegotiationManagerFactoryBean
WebBindingInitializer:org.springframework.web.bind.support.ConfigurableWebBindingInitializer
Messageconverters: Below

"4" <mvc:message-converters register-defaults= "true" >
==>org.springframework.http.converter.bytearrayhttpmessageconverter (default load)
==>org.springframework.http.converter.stringhttpmessageconverter (default load)
==>com.alibaba.fastjson.support.spring.fastjsonhttpmessageconverter (config)

==>org.springframework.http.converter.resourcehttpmessageconverter (default load)
==>org.springframework.http.converter.xml.sourcehttpmessageconverter (default load)
==>org.springframework.http.converter.support.allencompassingformhttpmessageconverter (default load)

==> Org.springframework.http.converter.feed.AtomFeedHttpMessageConverter (not loaded)
==>org.springframework.http.converter.feed.rsschannelhttpmessageconverter (not loaded)

==>org.springframework.http.converter.xml.mappingjackson2xmlhttpmessageconverter (not loaded)
==>org.springframework.http.converter.xml.jaxb2rootelementhttpmessageconverter (default load)
==>org.springframework.http.converter.json.gsonhttpmessageconverter (not loaded)

"5" Org.springframework.web.servlet.config.CompositeUriComponentsContributorFactoryBean
Property:
HandlerAdapter:org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter
ConversionService:org.springframework.format.support.FormattingConversionServiceFactoryBean


"6" Org.springframework.web.servlet.handler.ConversionServiceExposingInterceptor
"7" Org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver
"8" Org.springframework.web.servlet.handler.MappedInterceptor
"9" Org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver
"10" Org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver
"11" org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping
"12" Org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter
"13" Org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter

"Spring source learning" Springmvc URL and bean mapping principle and source code parsing