摘要：
Intent （定义） Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions 阅读全文
摘要：
Intent （定义） Decouple an abstraction from its implementation so that the two can vary independently. （从实现中分离出抽象，使两者可以独立变化） Also Known As （别名） Handle/Bo 阅读全文