Web Technology What is loc loc (Inversion of control) Also called DI (Dependency Injection) Hollywood Principle: Don't call me, I'lI call you A way of sorting out dependencies between objects and automatically "injecting"references to collaborating objects on demand The loc framework, usually via XML configuration files determines injection ■控制:对象的生命周期和对象间的关系Web Technology 7 What is IoC ▪ IoC (Inversion of control) Also called DI (Dependency Injection) Hollywood Principle: "Don't call me, I'll call you.“ ▪ A way of sorting out dependencies between objects and automatically “injecting” references to collaborating objects on demand ▪ The IoC framework, usually via XML configuration files determines injection ◼ 控制: 对象的生命周期和对象间的关系