Spring mvc 启动 和 请求分发

Spring mvc 启动 和 请求分发
启动加载：
    abstract class HttpServletBean extends HttpServlet
    void init()
    initServletBean();

        abstract class FrameworkServlet extends HttpServletBean
        void initServletBean()
        WebApplicationContext initWebApplicationContext()
        onRefresh(wac);

            class DispatcherServlet extends FrameworkServlet
            void onRefresh(ApplicationContext context)
            void initStrategies(ApplicationContext context)

            initMultipartResolver(context);
            initLocaleResolver(context);
            initThemeResolver(context);
            initHandlerMappings(context);
            initHandlerAdapters(context);
            initHandlerExceptionResolvers(context);
            initRequestToViewNameTranslator(context);
            initViewResolvers(context);
            initFlashMapManager(context);

请求分发：
      HTTP request-->httpServlet
        --->class FrameworkServlet ---->doPost() or doGet()

        processRequest(HttpServletRequest request, HttpServletResponse response)
        doService(request, response);

           class DispatcherServlet extends FrameworkServlet
           void doService(HttpServletRequest request, HttpServletResponse response)
           doDispatch(request, response);

           // Actually invoke the handler.
            mv = ha.handle(processedRequest, response, mappedHandler.getHandler());

             SimpleControllerHandlerAdapter implements HandlerAdapter

             ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler)
                   ((Controller) handler).handleRequest(request, response);

                用户在使用时，实现了 AbstractController.handleRequestInternal（）
                或者    重写 Controller handleRequest（）             

             ha 使用哪个Adapter ？ 一般需要在配置文件中写明
             <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
             <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

             <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
             <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

             下面这个文件中会自动加载
             /org/springframework/web/servlet/DispatcherServlet.properties

    org.springframework.web.servlet.HandlerMapping=org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,\
    org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping

    org.springframework.web.servlet.HandlerAdapter=org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,\
    org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,\
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter