• DVD管理系统的修改版


    import java.sql.Date;
      2 import java.text.SimpleDateFormat;
      3 import java.util.ArrayList;
      4 import java.util.Iterator;
      5 import java.util.Scanner;
      6 import java.util.Set;
      7 import java.util.TreeSet;
      8 
      9 import javax.net.ssl.TrustManagerFactorySpi;
     10 import javax.print.DocFlavor.STRING;
     11 
     12 
     13     //------DVD数据集合
     14 class DVDSet{
     15     
     16     //--DVD名称
     17     ArrayList<String> nameList = new ArrayList<String>();
     18     //--DVD状态
     19     ArrayList<Integer> stateList = new ArrayList<Integer>();
     20     //--DVD借出日期
     21     ArrayList<String> dateList = new ArrayList<String>();
     22     //--DVD借出次数
     23     ArrayList<Integer> countList = new ArrayList<Integer>();
     24 
     25 }
     26 
     27 class Rank implements Comparable<Rank>{
     28     
     29     String DVDName;
     30     Integer DVDState;
     31     String  DVDDate;
     32     Integer DVDCount;
     33     
     34     public Rank(String DVDName,Integer DVDState,String DVDDate,Integer DVDCount){
     35         
     36         this.DVDName = DVDName;
     37         this.DVDState = DVDState;
     38         this.DVDDate = DVDDate;
     39         this.DVDCount = DVDCount;
     40     }
     41 
     42     @Override
     43     public String toString() {
     44         // TODO Auto-generated method stub
     45         return "
    [DVD:《" + this.DVDName + "》	状态:" + this.DVDState + "	日期:" + this.DVDDate + "	次数:" + this.DVDCount + "]";
     46     }
     47     @Override
     48     public int compareTo(Rank o) {
     49         // TODO Auto-generated method stub
     50         if(o.DVDCount == o.DVDCount)
     51             return -1;
     52         return o.DVDCount - o.DVDCount;
     53     }
     54 }
     55 
     56 class DVDMagr{
     57     
     58     //------构造DVD集合对象
     59     DVDSet DVD = new DVDSet();
     60     
     61     //------DVD数据的初始化
     62     public void initial(){
     63         
     64         DVD.nameList.add("罗马假日");
     65         DVD.nameList.add("风声鹤唳");
     66         DVD.nameList.add("浪漫满屋");
     67         
     68         DVD.stateList.add(0);
     69         DVD.stateList.add(1);
     70         DVD.stateList.add(1);
     71         
     72         DVD.dateList.add("2016-12-1");
     73         DVD.dateList.add("无");
     74         DVD.dateList.add("无");
     75         
     76         DVD.countList.add(1);
     77         DVD.countList.add(0);
     78         DVD.countList.add(0);
     79     }
     80     
     81     //------菜单切换方法
     82     public void startMenu(){
     83         
     84         System.out.println("1.  新增 DVD");
     85         System.out.println("2.  查看 DVD");
     86         System.out.println("3.  删除 DVD");
     87         System.out.println("4.  借出 DVD");
     88         System.out.println("5.  归还 DVD");
     89         System.out.println("6.  退    出");
     90         System.out.println("7.  借出排行榜");
     91         System.out.println("*******************************");   
     92         System.out.println("请选择你要操作的栏目:");   
     93         Scanner keyNum = new Scanner(System.in);
     94         switch (keyNum.nextInt()) {
     95         case 1:
     96             System.out.println("----------->新增DVD~~~");
     97             System.out.println("*******************************");   
     98             addDVD();
     99             break;
    100         case 2:
    101             System.out.println("----------->查看DVD~~~");
    102             System.out.println("*******************************");  
    103             searchDVD();
    104             break;
    105         case 3:
    106             System.out.println("----------->删除DVD~~~");
    107             System.out.println("*******************************");   
    108             deleteDVD();
    109             break;
    110         case 4:
    111             System.out.println("----------->借出DVD~~~");
    112             System.out.println("*******************************");   
    113             lendDVD();
    114             break;
    115         case 5:
    116             System.out.println("----------->归还DVD~~~");
    117             System.out.println("*******************************");   
    118             returnDVD();
    119             break;
    120         case 6:
    121             System.out.println("----------->退出DVD~~~");
    122             System.out.println("*******************************");  
    123             returnSystem();
    124             break;
    125         case 7:
    126             System.out.println("----------->DVD借出排行榜~~~");
    127             System.out.println("*******************************");  
    128             listDVD();
    129             break;
    130         default :
    131             System.out.println("操作异常,程序重载中........");
    132             break;
    133         }
    134     }
    135     
    136     //------------新增DVD的方法
    137     public void addDVD(){
    138         
    139         Scanner keyInput = new Scanner(System.in);
    140         for (int i = 0; i < DVD.nameList.size(); i++) {
    141             
    142             if (DVD.nameList.get(i).equals(DVD.nameList.get(DVD.nameList.size()-1))) {
    143                 
    144                 System.out.println("请输入你要添加的 DVD名称:");
    145                 DVD.nameList.add(keyInput.next());
    146                 DVD.stateList.add(1);
    147                 DVD.dateList.add("无");
    148                 DVD.countList.add(0);
    149                 System.out.println("新的DVD添加成功~~~~~");
    150                 System.out.println("继续添加请按“1”,返回请按“0”:");
    151                 Scanner keyNum = new Scanner(System.in);
    152                 int num = keyNum.nextInt();
    153                 if (num == 1) {
    154                     
    155                     addDVD();
    156                 }else if (num == 0) {
    157                     
    158                     startMenu();
    159                 }
    160             }
    161         }
    162     }
    163     
    164     //------------查看DVD的方法
    165     public void searchDVD(){
    166         
    167         System.out.println("序号	" + "状态	" + "名称		" + "借出日期");
    168         for (int i = 0; i < DVD.nameList.size(); i++) {
    169             
    170             if (DVD.nameList.get(i) != null) {
    171                 
    172                 if (DVD.stateList.get(i) == 0) {
    173                     
    174                     System.out.println(( i + 1) + "	已    借出	" +"<<" + DVD.nameList.get(i) + ">>	" + DVD.dateList.get(i));
    175                 }else if (DVD.stateList.get(i) == 1) {
    176                     
    177                     System.out.println(( i + 1) + "	可以借阅	" + "<<" + DVD.nameList.get(i) + ">>	" + DVD.dateList.get(i));
    178                 }
    179             }
    180         }
    181         returnMain();
    182     }
    183     
    184     //------------删除DVD的方法
    185     public void deleteDVD(){
    186         
    187         System.out.println("请输入你要删除的DVD:");
    188         Scanner keyInput = new Scanner(System.in);
    189         String deleteDVD = keyInput.next();
    190         Iterator<String> it = DVD.nameList.iterator();
    191         
    192         while (it.hasNext()) {
    193             
    194             if (deleteDVD.equalsIgnoreCase(it.next())) {
    195                 
    196                 int index = DVD.nameList.indexOf(deleteDVD);
    197                 if (DVD.stateList.get(index) == 1) {
    198                     
    199                     DVD.nameList.remove(deleteDVD);
    200                     DVD.stateList.remove(index);
    201                     DVD.dateList.remove(index);
    202                     System.out.println("《" + deleteDVD + "》" + "删除成功!!!");
    203                     break;
    204                 }else if (DVD.stateList.get(index) == 0) {
    205                     
    206                     System.out.println("《" + deleteDVD + "》" +"已借出,无法删除");
    207                     break;
    208                 }
    209             }
    210             
    211             if(it.hasNext() == false){
    212                 
    213                 System.out.println("对不起,无法获取此DVD信息,请确认信息后重试!!!");
    214             }
    215         }
    216         returnMain();
    217     }
    218     
    219     //------------借出DVD的方法
    220     public void lendDVD(){
    221         
    222         System.out.println("请输入你要借出的DVD:");
    223         Scanner keyInput = new Scanner(System.in);
    224         String lendDVD = keyInput.next();
    225         Iterator<String> it = DVD.nameList.iterator();
    226         while (it.hasNext()) {
    227             
    228             if(lendDVD.equalsIgnoreCase(it.next())){
    229                 
    230                 int index = DVD.nameList.indexOf(lendDVD);
    231                 if(DVD.stateList.get(index) == 1){
    232                     
    233                     System.out.println("《" + lendDVD + "》" +"已找到,可以借阅!!!");
    234                     System.out.println("请输入你的借阅时间(年-月-日):");
    235                     Scanner keyDate = new Scanner(System.in);
    236                     DVD.dateList.set(index, keyDate.next());
    237                     DVD.stateList.set(index, 0);
    238                     int num = DVD.countList.get(index);
    239                     num++;
    240                     System.out.println("《" + lendDVD + "》" + "借阅成功!!!");
    241                     break;
    242                 }else if (DVD.stateList.get(index) == 0) {
    243                     
    244                     System.out.println("《" + lendDVD + "》" +"已借出,无法借阅!!!");
    245                     break;
    246                 }
    247             }
    248             
    249             if (it.hasNext() == false) {
    250                 
    251                 System.out.println("对不起,无法获取此DVD信息,请确认信息后重试!!!");
    252             }
    253         }
    254         returnMain();
    255     }
    256     
    257     //------------归还DVD的方法
    258     public void returnDVD(){
    259         
    260         String lendDate;
    261         String returnDate;
    262         System.out.println("请输入你要归还的DVD:");
    263         Scanner keyInput = new Scanner(System.in);
    264         String returnDVD = keyInput.next();
    265         int index = DVD.nameList.indexOf(returnDVD);
    266         if (index >= 0 && DVD.stateList.get(index) == 0) {
    267             
    268             lendDate = DVD.dateList.get(index);
    269             System.out.println("请输入你的归还日期(年-月-日):");
    270             returnDate = keyInput.next();
    271             DVD.stateList.set(index, 1);
    272             DVD.dateList.set(index, "无");
    273             System.out.println("《" + returnDVD + "》归还成功!!!");
    274             System.out.println("借DVD期间你所要支付的租金为(Charge):" + charge(lendDate,returnDate) + "$");
    275         }else{
    276         
    277             System.out.println("你归还的DVD没有借阅信息,请重新确认信息!!!");
    278         }
    279         returnMain();
    280     }
    281     
    282                 //-------------租金计算系统
    283     public long charge(String lendDate,String returnDate){
    284         
    285         long charge = 0;
    286         SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd");
    287         try {
    288             java.util.Date lDate = SDF.parse(lendDate);
    289             java.util.Date reDate = SDF.parse(returnDate);
    290             charge = (reDate.getTime() - lDate.getTime()) / (24*60*62*1000);
    291         } catch (Exception e) {
    292             // TODO: handle exception
    293             e.printStackTrace();
    294         }
    295         return charge + 2;
    296     }
    297     
    298     //------------DVD排行榜
    299     public void listDVD(){
    300         
    301         
    302         TreeSet set = new TreeSet();
    303 
    304         for (int i = 0; i < DVD.nameList.size(); i++) {
    305 
    306             set.add(new Rank(DVD.nameList.get(i), DVD.stateList.get(i), DVD.dateList.get(i), DVD.countList.get(i)));
    307         }
    308         
    309         Iterator it = set.descendingIterator();
    310         
    311         while(it.hasNext()){
    312             
    313             System.out.println(it.next());
    314         }
    315     }
    316     
    317     //------------返回主菜单方法
    318     public void returnMain(){
    319         
    320         System.out.println("*******************************"); 
    321         Scanner keyInput = new Scanner(System.in);
    322         System.out.println("系统操作:返回(*)  退出(#):");
    323         if (keyInput.next().equals("*")) {
    324             
    325             startMenu();
    326         }else if (keyInput.next().equals("#")) {
    327             
    328             returnDVD();
    329         }else {
    330             
    331             System.out.println("输入错误,异常终止!!!");
    332             return;
    333         }
    334     }
    335     
    336     //------------退出DVD的方法
    337     public void returnSystem(){
    338         
    339         Scanner keyInput = new Scanner(System.in);
    340         System.out.println("确认退出请输入-0-:");
    341         if (keyInput.nextInt() == 0) {
    342             
    343             System.out.println("DVD退出成功......");
    344             return;
    345         }else{
    346             
    347             System.out.println("输入错误,异常终止!!!");
    348             return;
    349         }
    350     }
    351 }
    352 
    353 public class MiniDVD {
    354 
    355     /**
    356      * @param args
    357      */
    358     public static void main(String[] args) {
    359         // TODO Auto-generated method stub
    360         
    361         //----构造管理员对象
    362         DVDMagr manger = new DVDMagr();
    363         
    364         System.out.println("
    ");  
    365         System.out.println("*******************************");  
    366         System.out.println("欢迎使用迷你DVD管理器");
    367         System.out.println("*******************************");
    368         
    369         //----DVD数据的初始化
    370         manger.initial();
    371         
    372         //----DVD的主菜单
    373         manger.startMenu();
    374     }
    375 
    376 }
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  • 原文地址:https://www.cnblogs.com/2016yjl/p/6137666.html
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