By dividing the crosscutting concern, Aspect-Oriented Programming (AOP) techniques makes programmer write contracts and business logics independently.

• 基于面向方面编程(Aspect-Oriented Programming,AOP)技术实现契约式设计,可以通过将横切关注点(crosscutting concern)分离的方式,令编程人员独立的编写组件的契约和业务逻辑。