设计模式——命令模式
本文共 184 字，大约阅读时间需要 1 分钟。
意图：
- 将一个请求封装为一个对象，从而可以使用不同的请求对客户进行参数化；支持请求排队、记录请求日志，以及撤销操作
场景：
- 调用者不需要知道响应者具体做了什么，而只需要一个统一的接口时
- 需要用到队列执行、取消操作、日志恢复的时候
类图：
优点：
- Command易于通过继承拓展新功能，并且可以在单个子类中实现复合功能
缺点：
- 容易产生子类爆炸
转载地址：http://jzwm.baihongyu.com/
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