spring mvc dispatcherservlet处理request流程

1.dispatcherservlet接收到请求后，doDispatch(request,response)

2.doDispatch()里进行handlermapping，handlermapping根据入参httprequest,返回结果是HandlerExecutionChain，HandlerExecutionChain里包含handlerAdaptor(controller)

//HandlerExecutionChain有个gethandler()方法，可以直接拿到handler

spring mvc源码

// Determine handler for the current request.
HandlerExecutionChain mappedHandler = getHandler(processedRequest);

if (mappedHandler == null || mappedHandler.getHandler() == null) {
noHandlerFound(processedRequest, response);
return;
}

//HandlerExecutionChain有个gethandler()方法，可以直接拿到handler

// Determine handler adapter for the current request.
HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());