SPRINGMVC processing Process

About SPRINGMVC Workflow I cite one of its official documents: 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M01/59/FA/ Wkiom1txfvlacgtxaajhu9bsd3a690.jpg "title=" 2015-02-28_163900.png "alt=" Wkiom1txfvlacgtxaajhu9bsd3a690.jpg "/>

The above picture from the macro-rough introduction of SPRINGMVC's entire work flow, concise and clear.

Let me take a look at the code from the point of view:

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Because we declared a Dispatcherservlet in Web. XML, the Tomcat initializes it when it is started.

We know that the servlet initialization method is init (), just start here and see what it's doing with initialization.

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First, initialize

There is an Init method in Httpservletbean

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The Initservletbean () method is overridden in the Frameworkservlet class

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The Initwebapplicationcontext () method in Frameworkservlet

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Overriding the Onrefresh () method in the Dispatcher class

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At this point, we see Dispatcherservlet initializing a bunch of components, what the view parser, the processor mapping, and so on.

Ii. Processing of requests

Because Dispatcherservlet is inherited HttpServlet, the Doget or Dopost method is called when processing the request

Doget and Dopost methods are overridden in the Frameworkservlet class

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The ProcessRequest method in Frameworkservlet is like this

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It calls the Doservice method, and then the fun begins.

Dispatcherservlet rewrite the Doservice () method

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At this point, request processing is complete

Summarize the process:

1. Bind a resource to a request

2. Check if File upload

3. Find handlermappping Get Handlerexecutionchain

4. Call the Prehandle method of all interceptors associated with the processor in turn

5. Calling the Processor method

6. Call the Posthandle method of all interceptors associated with the processor in turn

7. Render View

8. Call the Aftercompleting method of all interceptors associated with the processor in turn
   

This article is from the "ten-li Rice flower" blog, please be sure to keep this source http://5880861.blog.51cto.com/5870861/1616032

SPRINGMVC processing Process