设计形式-策略模式

设计模式----策略模式

策略模式定义了一系列的算法，并将每一个算法封装起来，而且使它们还可以相互替换。策略模式让算法独立于使用它的客户而独立变化。（原文：The Strategy Pattern defines a family of algorithms,encapsulates each one,and makes them interchangeable. Strategy lets the algorithm vary independently from clients that use it.）

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实例

算法接口：Strategy.java

package strategy;public class Main {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubContext context;//算法Acontext = new Context(new ConcreteStrategyA());context.contextInterface();//算法Bcontext = new Context(new ConcreteStrategyB());context.contextInterface();}}