Design mode 1

Static Factory mode, factory method mode, abstract Factory mode

The factory method improves the open-close principle that static plants do not meet when adding new products, while the abstract factory satisfies the situation when the product is a product family.

Bridging mode, Command mode

Bridging mode separates the abstraction from the implementation, so that they can be independent of each other

The execution of a command in command mode is performed by the command performer as the Command property, and does not have to be returned, as long as the command is executed.

The function of a class of bridging mode requires the properties of this class to be completed, some are a property to be completed, and some require multiple attributes to be completed together.

Design mode 1