tell me the distribution of individuals currently in use
Controller: accepts Web requests, distributes and invokes different logic or services to complete a task, returns data
service: does some service Api interface related code
dao: deals with database (adds, deletes and modifies tables)
logic: 's own business logic
PC
1:,controller,controler,
2:,Controllercontollersql,,,,Controller,,,,dao
3:,,,,PC->->,logic(logicdao),RegisterLogic,,, new RegisterLogic()->register();
4:,,,,,,,service
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