在本项目“设计模式期末大作业 ToFu”中,开发者运用了多种设计模式来构建一个豆腐商店的应用。这个应用展示了如何在实际编程中灵活运用设计模式来提高代码的可读性、可维护性和可扩展性。以下是每个设计模式的详细说明: 1. **建造者模式(Builder Pattern)** 建造者模式是一种创建型设计模式,它将复杂对象的构建过程与表示分离,使得同样的构建过程可以创建不同的表示。在这个豆腐商店中,可能用建造者模式来创建不同类型的豆腐产品,如红烧豆腐、麻婆豆腐等。通过建造者类,我们可以一步步构建豆腐产品的各个部分,最后组合成一个完整的豆腐实例。 2. **工厂模式(Factory Pattern)** 工厂模式是一种常用的创建型设计模式,用于提供一个接口,用于创建相关或相互依赖的对象,而无需指定它们的具体类。在豆腐商店中,可能会有一个豆腐工厂类,负责根据用户需求动态地创建不同种类的豆腐产品,比如用户需要甜的豆腐,工厂就会返回一个甜豆腐的实例。 3. **代理模式(Proxy Pattern)** 代理模式为其他对象提供一种代理以控制对这个对象的访问。在豆腐商店中,可能有代理类来处理豆腐的购买过程,如验证用户权限、记录购买行为、计算总价等,这样可以保护真实的豆腐对象不被直接访问,同时增加额外的功能。 4. **策略者模式(Strategy Pattern)** 策略模式定义了一系列算法,并将每一个算法封装起来,使它们可以互相替换,让算法的变化独立于使用它的客户。在豆腐商店中,可以用来处理不同的促销策略,例如满减、打折等。根据用户的订单情况,系统会选择合适的策略来计算最终价格。 这些设计模式的运用,使得豆腐商店系统具备良好的模块化和灵活性,方便后期添加新的豆腐类型、修改促销策略或增加其他功能。通过分包管理,代码结构清晰,易于理解和维护。然而,项目的不足之处可能包括:未充分考虑异常处理、测试覆盖率不够高、没有完全遵循单一职责原则等。持续改进和完善这些方面,将有助于提升整个豆腐商店系统的质量和稳定性。
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