本地通知
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Spring MVC 架构
整体结构
servlet
Httpservlet -- java
FrameworkServlet
DispatcherServlet
--初始化九大组件
doDispatcher
--
mappedHandler = getHandler(processedRequest, false);
HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());
if (!mappedHandler.applyPreHandle(processedRequest, response)) {
return;
}
// Actually invoke the handler.
mv = ha.handle(processedRequest, response, mappedHandler.getHandler());
mappedHandler.applyPostHandle(processedRequest, response, mv);
processDispatchResult(processedRequest, response, mappedHandler, mv, dispatchException);
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Spring MVC-HandlerMapping
HandlerMapping 继承关系
**HandlerMapping**
只有一个方法：通过request获取handler
HandlerExecutionChain getHandler(HttpServletRequest request)
AbstractHandlerMapping----HandlerMapping的抽象实现
--getHandler方法实现
通过getHandlerInternal获取handler，该方法是子类实现的
具体不同的子类实现方法不一样。
若没有获取到则使用默认的handler
handler转String，来获取bean
AbstractHandlerMapping
–AbstractUrlHandlerMapping
–AbstractHanlderMethodMapping
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