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());