设计模式实验，包括：策略模式、观察者模式、装饰者模式、抽象工厂模式、单件模式、命令模式、适配器模式、外观模式，共8个。-Experimental design patterns, including: strategy pattern, observer pattern, the Decorator Pattern, the abstract factory pattern, the singleton pattern, command pattern, adapter pattern, appearance model, a total of 8.