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Anonymous users2024-02-11MVC mode:
MVC is short for Model-View-Control. Present on the server.
Expressing the high degree of coupling between applications in the model of the application that is applied separately.
MVC is a software design pattern invented in the 80s of the 20th century and has been widely used to this day in recent years.
Recommended as a design pattern for Sun's J2EE platform.
MVC schema structure.
The MVC mode application is divided into three parts: model, view, and controller
1.View: Presentation of data.
A view is the interface that the user sees and interacts with. The view displays relevant data to the user and can receive input data from the user, but it does not do any actual business processing. A view can query the business status to the model, but it cannot change the model.
The view can also accept data update events from the model, allowing the user interface to be updated synchronously.
2.Model: Applies objects.
The model is the main part of the application. Models represent business data and business logic; When the data changes, it is responsible for notifying the view section; A single model can provide data for multiple views. Since the same model can be reused by multiple views, the reusability of the application is improved.
3.Controller: Logically processes and controls the display of entity data on the view, and invokes the model to process business requests.
When a web user clicks the submit button in a web page to send an HTML form, the controller receives the request and calls the appropriate model component to process the request, and then invokes the appropriate view to display the data returned by the model.
How MVC mode works.
In the MVC model, all requests submitted by web users to the server are taken over by the controller. When the request is received, the controller is responsible for deciding which model to invoke for processing; The model processes the corresponding business logic according to the user request and returns the data. Finally, the controller invokes the corresponding view to format the data returned by the model and present it to the user through the view.
Frame. Software development is increasingly relying on the use of frameworks. The framework can shorten the development cycle of application software systems and improve software productivity and quality.
Development is greatly simplified. The choice of which framework and how each framework is applied in the system architecture is an important part of software architecture design.
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Anonymous users2024-02-10Young man, you're a ba, right? This is the latest addition to the Honey Excel5000 series and can be attached to the XCL8010A.
It can also fly with bombs, and hang the IO modules of XF, XFR series and IO830A.
The one you wrote doesn't have a display.
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You will still grow, the average child will grow to about 20 years old, and some will suddenly grow a lot taller in what year, you don't have to worry.
It's hard to say, it's more than 190.
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It's not fat, it's standard. If you play center, the chassis is too light to dominate the basket. And basketball has certain physical requirements, which can be reduced, but it will not be too ideal, it will only make you stronger. It would be nice to be able to reduce it to 130.