策略模式Java代码实现.docx

/blog/631241/blog/631241Java代码 /** ??*?h1策略模式/h1??*?QS:做个商场收银软件，营销员根据客户所购买的商品和数量向客户收费?第一次程序 ??*?@author?xangqun ??*?*/??public?class?Program?{??/** ??*PS: ??*?pre如果商场搞活动，商品打8折，打5折怎么办？？/pre??*?@param?args ??*?@throws?IOException ??*/???public?static?void?main(String[]?args)?throws?IOException?{?System.out.println(单价：);?String?strA?=?new?BufferedReader(new?InputStreamReader(System.in))?.readLine();?System.out.println(数量：);?String?strB?=?new?BufferedReader(new?InputStreamReader(System.in))?.readLine();?double?numberd?=?Double.valueOf(strA)?+?Double.valueOf(strB);?System.out.println(价格为：?+?numberd);??}?}??Java代码 /** ??*?h1策略模式/h1??*?QS:做个商场收银软件，营销员根据客户所购买的商品和数量向客户收费?第一次程序 ??*?@author?xangqun ??*?改进的程序1 ??*/??public?class?ProgramTwo?{??/** ??*?PS:3个分支执行的语句除了打折不一样外几乎没什么不同应该考虑重构下 ??*?@param?args ??*?@throws?IOException?*?*/???public?static?void?main(String[]?args)?throws?IOException?{??System.out.println(单价：);?String?strA?=?new?BufferedReader(new?InputStreamReader(System.in))?.readLine();?System.out.println(数量：);?String?strB?=?new?BufferedReader(new?InputStreamReader(System.in))?.readLine();?System.out.println(折扣：);?String?strC?=?new?BufferedReader(new?InputStreamReader(System.in))?.readLine();?int?numc=?Integer.valueOf(strC);?double?result?=?0;?switch(numc){?case?1:result=Double.valueOf(strA)?+?Double.valueOf(strB);break;?case?2:result=(Double.valueOf(strA)?+?Double.valueOf(strB))*0.8;break;?case?3:result=(Double.valueOf(strA)?+?Double.valueOf(strB))*0.5;break;?}?System.out.println(result);?}??Java代码 public?abstract?class?CashSuper?{??public?abstract?double?acceptCash(double?money);}??Java代码 public?class?CashNormal?extends?CashSuper?{??@Override??public?double?acceptCash(double?money)?{??return?money;?}?}??Java代码 public?class?CashRebate?extends?CashSuper?{??private?double?moneyRebate=1d;?public?CashRebate(){}?public?CashRebate(String?moneyRebate){?this.moneyRebate=Double.valueOf(moneyRebate);?}?@Override??public?double?acceptCash(double?money)?{?return?money*moneyRebate;?