策略模式

listnumber

主要特点
1.定义一系列算法，这些算法都完成相同的工作，只是实现不同
2.strategy 层次的context 主要实现具体算法方法的实现
3.客户层次的调用，由客户层决定调用具体的算法
4.封装算法的变化，定义算法家族，算法之间可以相互替换，而不影响使用的客户
interface Ioperate{public void operate();}class design_mode_Strategy_A implements Ioperate{public void operate(){      System.out.println("this is design_mode_Strategy_A method ");}}class design_mode_Strategy_B implements Ioperate{public void operate(){      System.out.println("this is design_mode_Strategy_B method ");}}class design_mode_Strategy_C implements Ioperate{public void operate(){      System.out.println("this is design_mode_Strategy_C method ");}}class design_mode_Strategy_Context{ private Ioperate _Ioperate; public design_mode_Strategy_Context(Ioperate ope){ _Ioperate = ope; } public void operate(){ this._Ioperate.operate(); }}   design_mode_Strategy_Context tx;   tx = new design_mode_Strategy_Context( new design_mode_Strategy_B());   tx.operate();