设计模式学习之策略模式
1.名词解释：
策略模式：它定义了算法家族，分别封装起来，让它们之间可以互相替换，此模式让算法的变化，不会影响到使用算法的用户。在不同的时间或条件应用不同的业务规则时，可以考虑使用策略模式；
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2.代码示例：
策略抽象类package DesignPattern.StrategyPattern;public abstract class Strategy {public abstract void Execute();}?
具体策略类Apackage DesignPattern.StrategyPattern;public class ConcreateStrategyA extends Strategy{@Overridepublic void Execute() {//代码逻辑System.out.println("ConcreateStrategyA.execute is process...");}}?
具体策略类Bpackage DesignPattern.StrategyPattern;public class ConcreateStrategyB extends Strategy{@Overridepublic void Execute() {// TODO Auto-generated method stubSystem.out.println("ConcreateStratetyB.execute is process...");}}?
package DesignPattern.StrategyPattern;public class Context {private Strategy strategy = null;public Context(Strategy strategy) {this.strategy = strategy;}public void ContextInterface() {strategy.Execute();}}?
主控程序类：package DesignPattern.StrategyPattern;public class Client {public static void main(String[] args) {Strategy a = new ConcreateStrategyA();Strategy b = new ConcreateStrategyB();Context c1 = new Context(a);Context c2 = new Context(b);c1.ContextInterface(); c2.ContextInterface();} }?