java迷你DVD管理器

package com.xxx.dvd;public class DVDSet {public String name;//dvd名称public int state;//dvd状态public String date;//借dvd日期public int count;//借DVD次数public String getName() {return name;}public void setName(String name) {this.name = name;}public int getState() {return state;}public void setState(int state) {this.state = state;}public String getDate() {return date;}public void setDate(String date) {this.date = date;}public int getCount() {return count;}public void setCount(int count) {this.count = count;}public DVDSet() {super();// TODO Auto-generated constructor stub}public DVDSet(String name, int state, String date,int count) {super();this.name = name;this.state = state;this.date = date;this.count = count;}}

package com.xxx.dvd;import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;public class DVDMgr {public DVDSet[] dvd = new DVDSet[100];public  void initial(){//初始化dvd[0] = new DVDSet("罗马假日",0,"2013-7-1",1);dvd[1] = new DVDSet("风声鹤唳",1,"",0);dvd[2] = new DVDSet("浪漫满屋",1,"",0);}//增加dvdpublic void addDvd(){Scanner sc = new Scanner(System.in);System.out.println("--->新增DVD");System.out.println("请输入DVD名称:");String name = sc.next();System.out.println("新增"+name+"成功！");int index;for (index = 0; index < dvd.length; index++) {if(dvd[index]==null){break;}}dvd[index]=new DVDSet(name,1,"",0);}//查看dvdpublic void ShowDvd(){System.out.println("--->查看书籍");System.out.println("序号"+"\t"+"名称"+"\t"+"状态"+"\t"+"借出日期");for (int i = 0; i < dvd.length; i++) {if(dvd[i] != null){if(dvd[i].getState()==1){System.out.println(i+"\t"+dvd[i].getName()+"\t"+"可借"+"\t"+dvd[i].getDate());}else{System.out.println(i+"\t"+dvd[i].getName()+"\t"+"已借出"+"\t"+dvd[i].getDate());}}}}//删除dvdpublic void deleteDvd(){System.out.println("--->删除DVD");Scanner sc = new Scanner(System.in);System.out.println("输入DVD名称");String dvdname = sc.nextLine();int index;//删除dvd的索引for (int i = 0; i < dvd.length; i++) {if(dvd[i].getName().equals(dvdname)){//找到要删除dvd的序列index = i;//序列赋值给indexif(dvd[index].getState()==1){//判断是否借出int j=0;for (int k = 0; k < dvd.length; k++) {if(k!=index){dvd[j]=dvd[k];j++;}}}else{System.out.println("改dvd已经借出！无法删除");}break;}}System.out.println(dvdname+"删除成功！");}//借DVDpublic void borrowDVD(){Scanner sc = new Scanner(System.in);System.out.println("--->借出DVD");System.out.println("输入DVD名称：");String dvdname = sc.nextLine();try {for (int i = 0; i < dvd.length; i++) {if(dvd[i].name.equals(dvdname)){if(dvd[i].getState()==1){System.out.println("请输入借DVD日期：");String date = sc.nextLine();dvd[i].setState(0);dvd[i].setDate(date);System.out.println("借出"+dvdname+"成功！");int count = dvd[i].getCount();dvd[i].setCount(++count);break;}if(dvd[i].getState()==0){System.out.println("该DVD以借出！");break;}}}} catch (NullPointerException e) {e.printStackTrace();}}//归还DVDpublic void returnDvd() throws ParseException{int money;//租金Scanner sc = new Scanner(System.in);System.out.println("--->归还DVD");System.out.println("输入DVD名称：");String dvdname = sc.nextLine();try {for (int i = 0; i < dvd.length; i++) {if(dvd[i].name.equals(dvdname)){if(dvd[i].getState()==0){System.out.println("输入归还日期：");String retuenDate = sc.nextLine();dvd[i].setState(1);System.out.println("归还"+dvdname+"成功！");System.out.println("借出日期："+retuenDate);System.out.println("归还日期："+dvd[i].getDate());SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date rdate = sdf.parse(retuenDate);//将输入的字符串转换为日期类型 还书日期Date bdate = sdf.parse(dvd[i].getDate());//借dvd日期long days=(rdate.getTime()-bdate.getTime())/(1000*3600*24);//计算借了多少天money = (int) (days*1);System.out.println("应付租金："+money+"元");dvd[i].setDate("");break;}if(dvd[i].getState()==1){System.out.println("该DVD以借出！");break;}}}} catch (NullPointerException e) {e.printStackTrace();}}//借dvd次数排行榜public void maxCount(){System.out.println("dvd借出排行榜");System.out.println("---------------------");for (int i=dvd.length-1;i>0;i--) {if(dvd[i]!=null){for (int j = 0; j < i; j++) {if(dvd[j]!=null){if(dvd[j].getCount()<dvd[j+1].getCount()){DVDSet[] temp = new DVDSet[100];temp[0] = dvd[j];dvd[j]=dvd[j+1];dvd[j+1]=temp[0];}}}}}System.out.println("dvd名"+"\t"+"次数");for (int i = 0; i < dvd.length; i++) {if(dvd[i]!=null){System.out.println(dvd[i].getName()+"\t"+dvd[i].getCount());}}}}

package com.xxx.dvd;import java.text.ParseException;
import java.util.Scanner;public class Menu {public static void starMenu(DVDMgr dm){System.out.println("欢迎使用迷你DVD管理器");System.out.println("----------------------");System.out.println("0.DVD排行榜");System.out.println("1.新增DVD");System.out.println("2.查看DVD");System.out.println("3.删除DVD");System.out.println("4.借出DVD");System.out.println("5.归还DVD");System.out.println("6.退出");System.out.println("----------------------");showMenu(dm);}public static void showMenu(DVDMgr dm){Scanner sc = new Scanner(System.in);System.out.println("请选择:");int a = sc.nextInt();switch (a) {case 0://dvd借出排行榜dm.maxCount();returnMenu(dm);break;case 1://新增dvddm.addDvd();returnMenu(dm);break;case 2://查看dvddm.ShowDvd();returnMenu(dm);break;case 3://删除dvddm.deleteDvd();returnMenu(dm);break;case 4://借出dvddm.borrowDVD();returnMenu(dm);break;case 5://归还dvdtry {dm.returnDvd();} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}returnMenu(dm);break;case 6://退出System.out.println("谢谢使用！");break;default:break;}}public static void returnMenu(DVDMgr dm){System.out.println("输入0返回");Scanner sc = new Scanner(System.in);int a = sc.nextInt();if(a==0){starMenu(dm);}else{System.out.println("系统退出！");}}}

package com.xxx.dvd;public class Test {public static void main(String[] args) {DVDMgr dm = new DVDMgr();dm.initial();Menu.starMenu(dm);}}

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