package com.strategy;
/**
* 现金收取类
* @author Administrator
*
*/
public interface CashSuper {
/**
*
* @param money 收取现金，参数为原价，返回当前价
* @return
*/
public double acceptCash (double money);
}
package com.strategy;
/**
* 正常收费 ,不参加任何活动。
* @author Administrator
*
*/
public class CashNormal implements CashSuper {
@Override
public double acceptCash(double money) {
return money;
}
}
package com.strategy;
/**
* 打折收费
* @author Administrator
*
*/
public class CashRebate implements CashSuper {
private double moneyRebate = 1;
public CashRebate (String rebate ){
this.moneyRebate =Double.parseDouble(rebate) ;
}
@Override
public double acceptCash(double money) {
return this.moneyRebate * money;
}
}
package com.strategy;
/**
* 返利收费 ，满多少返多少
* @author Administrator
*
*/
public class CashReturn implements CashSuper {
private double moneyCondition;
private double moneyReturn;
public CashReturn (String moneyCondition ,String moneyReturn){
this.moneyCondition = Double.parseDouble(moneyCondition);
this.moneyReturn = Double.parseDouble(moneyReturn);
}
@Override
public double acceptCash(double money) {
double result = 0 ;
if (money >= this.moneyCondition){
result = money - Math.floor(money/this.moneyCondition) * this.moneyReturn;
}
return result;
}
}
package com.strategy;
/**
* 策略 类
* @author Administrator
*
*/
public class ContentStrategy {
private CashSuper cashSuper;
//初始化，传入具体策略对象
public ContentStrategy (String type){
if ("normal".equalsIgnoreCase(type)) {
this.cashSuper = new CashNormal();
}
else if ("rebate".equalsIgnoreCase(type)){
this.cashSuper = new CashRebate("0.8");
}
else if ("return".equalsIgnoreCase(type)){
this.cashSuper = new CashReturn("300", "100");
}
}
//调用算法方法
public double getResult (double money){
return cashSuper.acceptCash(money);
}
}
package com.strategy;
/**
* 策略模式是一种定义一系列算法的方法，从概念上来看，所有的这些算法都完成相同的工作
* 只是实现不一样，它可以以相同的方式调用所有的算法，减少了各种算法类与使用算法类之间
* 的耦合，只要在分析过程中听到需要在不同时间应用不同的业务规则，就可以考虑使用策略模式
* 处理这种变化的可能性。
* @author Administrator
*
*/
public class MainRun {
public static void main(String[] args) {
ContentStrategy strategy = new ContentStrategy("rebate");
double returnVal = strategy.getResult(100);
System.out.println("reuturnVal = "+returnVal);
}
}