实验五责任链模式

1、实验5：责任链模式一、实验目的本实验要求学生掌握责任链模式，要求学生理解责任链模式中的二种角色并完成类的定义及测试。二、实验任务1 计算整数的阶乘。要求在计算阶乘时综合考虑计算速度与内存占用多少，使用责任链模式分析有哪些类以及这些类的角色，完成这些类的定义并分别测试每一种处理情况。答：处理者（Handler）角色：类Handler 具体处理者（ConcreteHandler）角色：类UseInt、类UseLong、类UseBigInteger（1）处理者（Handler）Handler.javapublic interface Handler public void handleRequest

2、(String str); public void setNextHandler(Handler handler);（2）具体处理者（ConcreteHandler）UseInt.javapublic class UseInt implements Handlerprivate Handler handler;private int result = 1; public void handleRequest(String str) try int n=Integer.parseInt(str); int i=1; while(i<=n) result = result*i; if(res

3、ult<=0) System.out.println("超出我的能力范围，我计算不了"); handler.handleRequest(str); return ; i+; System.out.println(str+"的阶乘："+result+"n"); catch (NumberFormatException exp) System.out.println(exp.toString(); public void setNextHandler(Handler handler) this.handler=handler; Us

4、eLong.javapublic class UseLong implements Handler private Handler handler; long result=1; public void handleRequest(String str) try int i=1; long n=Long.parseLong(str); while(i<=n) result=result*i; if(result<=0) System.out.println("超出我的能力范围，我计算不了"); handler.handleRequest(str); return

5、 ; i+; System.out.println(str+"的阶乘："+result+"n"); catch(NumberFormatException exp) System.out.println(exp.toString(); public void setNextHandler(Handler handler) this.handler=handler; UseBigInteger.javapublic class UseBigInteger implements Handlerprivate Handler handler;private B

6、igInteger result = new BigInteger("1"); public void handleRequest(String str) BigInteger n = new BigInteger(str); BigInteger ONE = new BigInteger("1"); BigInteger i = ONE; while(pareTo(n)<=0) result=result.multiply(i); i=i.add(ONE); System.out.println(str+"的阶乘："+resu

7、lt+"n"); public void setNextHandler(Handler handler) this.handler=handler; （3）测试类：Test.java public class Test private Handler useInt,useLong,useBigInteger;public void createChain()useInt = new UseInt();useLong = new UseLong();useBigInteger = new UseBigInteger();useInt.setNextHandler(useLon

8、g);useLong.setNextHandler(useBigInteger);public void responseClient(String str)System.out.println("计算"+str+"的阶乘");useInt.handleRequest(str);public static void main(String args) Test test=new Test();test.createChain();test.responseClient("10");test.responseClient("2

9、0");test.responseClient("32");运行截图如下：2 采购审批往往是分级进行的，其常常根据采购金额的不同由不同层次的主管人员来审批。例如，主任可以审批5万元以下（不包括5万元）的采购单，副董事长可以审批5万元至10 万元（不包括10万元）的采购单，董事长可以审批10万元至50万元（不包括50 万元）的采购单，50 万元及以上的采购单就需要开董事会讨论决定。使用责任链模式分析有哪些类以及这些类的角色，完成这些类的定义并分别测试每一种处理情况。答：处理者（Handler）角色：类Handler 具体处理者（ConcreteHandler）角色：

10、类ChairMan.java、类Vice_president、类President 、类Meetting（1）处理者（Handler）Handler.javapublic interface Handler public void handleRequest(String str); public void setNextHandler(Handler handler);（2）具体处理者（ConcreteHandler）ChairMan.javapublic class ChairMan implements Handler Handler handler; public void reque

11、stHandle(String str) try long money = Long.parseLong(str); if(money<50000) System.out.println("主任审批"+money+"元"); System.out.println(); else System.out.println(money+"元"+"超出主任范畴"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(Han

12、dler handler) this.handler=handler; Vice_president.javaclass Vice_president implements Handler Handler handler; public void requestHandle(String str) try long money=Long.parseLong(str); if(money>=50000&&money<100000) System.out.println("副董事长审批"+money+"元"); System.ou

13、t.println(); else System.out.println(money+"元"+"超出副董事长范畴"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(Handler handler) this.handler=handler; President.javaclass President implements Handler Handler handler; public void requestHandle(String str) try

14、 long money=Long.parseLong(str); if(money>=100000&&money<500000) System.out.println("董事长审批"+money+"元"); System.out.println(); else System.out.println(money+"元"+"超出董事长范畴"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(

15、Handler handler) this.handler=handler; Meetting.javaclass Meetting implements Handler Handler handler; public void requestHandle(String str) try BigInteger money=new BigInteger(str); if(pareTo(new BigInteger("500000")>=0) System.out.println("会议审批"+money+"元"); System.

16、out.println(); catch(Exception e) public void setNextHandler(Handler handler) this.handler=handler; （3）测试类：Test.java public class Test ChairMan chairman; Vice_president vice_president; President president; Meetting meetting;public void createChine() chairman= new ChairMan(); vice_president = new Vic

17、e_president(); president = new President(); meetting = new Meetting (); chairman.setNextHandler(vice_president);vice_president.setNextHandler(president);president.setNextHandler(meetting);public void setClientRequest(String str)System.out.println("采购金额:"+str+"元");chairman.request

18、Handle(str); public static void main(String args) Test test = new Test();test.createChine();test.setClientRequest("6000");test.setClientRequest("60000");test.setClientRequest("110000");test.setClientRequest("6000000");运行截图如下：3 公司请假审批流程如下：如果请假小于3天只需要项目经理批复就行；如果

19、请假大于等于3天，小于7天需要人事经理批复；如果请假大于等于7天，小于15天需要总经理批复；如果申请请假大于等于15天，决绝批复。使用责任链模式分析有哪些类以及这些类的角色，完成这些类的定义并分别测试每一种处理情况。答：处理者（Handler）角色：类Handler 具体处理者（ConcreteHandler）角色：类Project_Manager、类Personel_Manager、类Top_Manager、类Meetting（1）处理者（Handler）Handler.javapublic interface Handler public void handleRequest(String

20、 str); public void setNextHandler(Handler handler);（2）具体处理者（ConcreteHandler）Project_Manager.javapublic class Project_Manager implements Handler Handler handler; public void requestHandle(String str) try int day=Integer.parseInt(str); if(day<3) System.out.println("项目经理批复n"); else System.

21、out.println("超出项目经理职权"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(Handler handler) this.handler=handler; Personel_Manager.javapublic class Personel_Manager implements Handler Handler handler; public void requestHandle(String str) try int day=Integer.parseIn

22、t(str); if(day>=3&&day<7) System.out.println("人事经理批复n"); else System.out.println("超出人事经理职权"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(Handler handler) this.handler=handler; Top_Manager.javapublic class Top_Manager implements Handler

23、 Handler handler; public void requestHandle(String str) try int day=Integer.parseInt(str); if(day>=7&&day<15) System.out.println("总经理批复n"); else System.out.println("总经理考虑"); handler.requestHandle(str); catch(Exception e) public void setNextHandler(Handler handler) t

24、his.handler=handler; Meetting.javapublic class Meetting implements Handler Handler handler; public void requestHandle(String str) try int day=Integer.parseInt(str); if(day>=15) System.out.println("决绝批复n"); catch(Exception e) public void setNextHandler(Handler handler) this.handler=handle