Controller Service DAO Summary

Today, I studied Controller,service,dao's knowledge mainly.

I understand the main thing is, controller mainly deal with the front page

For example: The front page has a "Add user" submit button, click, you first process, and then instantiate

A controller class, you can invoke some of the methods under the controller.

Then, the controller does not do the actual AddUser method, it will only the data sent by the foreground

And then instantiate a service class under the Controller and continue to invoke the AddUser method under the service class.

The service then instantiates a DAO class and continues to invoke the AddUser method under the DAO class.

DAO uses the middleware of spring data to manipulate the database. Then the layers are returned.

Controller Service DAO Summary