java歌曲管理系统

歌曲

编号、歌名、语言（中文/英文）、类别（流行/通俗）、歌手

Song.java

 1  package ex8;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 import java.util.Scanner;
 6 import java.util.Set;
 7 
 8 public class Song {
 9 
10 
11     private int sid;
12     private String sname;
13     private String category;
14     private String singer;
15 
16     public Song() {
17         
18     }
19 
20     public Song(int sid, String sname, String category, String singer) {
21         super();
22         this.sid = sid;
23         this.sname = sname;
24         this.category = category;
25         this.singer = singer;
26     }
27 
28     public int getSid() {
29         return sid;
30     }
31 
32     public void setSid(int sid) {
33         this.sid = sid;
34     }
35 
36     public String getSname() {
37         return sname;
38     }
39 
40     public void setSname(String sname) {
41         this.sname = sname;
42     }
43 
44     public String getCategory() {
45         return category;
46     }
47 
48     public void setCategory(String category) {
49         this.category = category;
50     }
51 
52     public String getSinger() {
53         return singer;
54     }
55 
56     public void setSinger(String singer) {
57         this.singer = singer;
58     }
59     
60     
61 }

SongDao.java

 1 package ex8;
 2 
 3 import java.util.List;
 4 
 5 public class SongDao {
 6     
 7     private List<Song> songList;
 8     
 9     public SongDao() {
10         
11     }
12 
13     public SongDao(List<Song> songList) {
14         super();
15         this.songList = songList;
16     }
17 
18 //    新增歌曲 
19     public void add(Song song) {
20         songList.add(song);
21     }
22     
23 //    查询歌曲
24 //    按id查找
25     public Song search(int sid) {
26         for(Song song : songList) {
27             if(song.getSid()==sid){
28                 return song;
29             }
30         }
31         return null;
32     }
33 //    按对象查找
34     public Song search(Song song) {
35         if(song==null) {
36             return null;
37         }
38         return search(song.getSid());
39     }
40     
41 //    删除歌曲
42 //按id删除歌曲
43     public void delete(int sid) {
44         Song song=search(sid);
45         if(song!=null) {
46             songList.remove(song);
47         }
48     }
49 //按对象删除歌曲
50     public void delete(Song song) {
51         if(song!=null) {
52             delete(song.getSid());
53         }
54     }
55     
56     public List<Song> getSongList() {
57         return songList;
58     }
59 
60     public void setSongList(List<Song> songList) {
61         this.songList = songList;
62     }
63 }

SongService.java

 1 package ex8;
 2 
 3 import java.util.List;
 4 
 5 import javax.swing.Spring;
 6 
 7 public class SongService {
 8     private SongDao dao;
 9 
10     public SongService() {
11         super();
12         // TODO Auto-generated constructor stub
13     }
14 
15     public SongService(SongDao dao) {
16         super();
17         this.dao = dao;
18     }
19 
20     public void add(Song song) {
21         dao.add(song);
22     }
23     
24     public Song search(int sid) {
25         return dao.search(sid);
26     }
27     
28     public Song search(Song song) {
29         return dao.search(song);
30     }
31 
32     public void delete(Song song) {
33         dao.delete(song);
34     }
35     
36     public void delete(int id) {
37         dao.delete(id);
38     }
39     
40 
41     
42 
43     public List<Song> trace(){
44         return dao.getSongList();
45     }    
46 
47     public void alter(Song song) {
48         
49     }
50     
51     public SongDao getDao() {
52         return dao;
53     }
54 
55     public void setDao(SongDao dao) {
56         this.dao = dao;
57     }
58     
59 
60 }

SongView.java

  1  package ex8;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.InputStreamReader;
  5 import java.net.DatagramPacket;
  6 import java.util.ArrayList;
  7 import java.util.List;
  8 import javax.swing.text.AbstractDocument.BranchElement;
  9 
 10 public class SongView {
 11 
 12     private SongService service;
 13 
 14     public SongView() {
 15         super();
 16         // TODO Auto-generated constructor stub
 17     }
 18 
 19     public SongView(SongService service) {
 20         super();
 21         this.service = service;
 22     }
 23     
 24     public void show() throws Exception{
 25         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
 26         boolean stop=false;
 27         while(!stop){
 28             System.out.println("****************************************************
"
 29                     +"                                       **歌曲管理** 
"
 30                     +"    1-----------------------------------查找歌曲
"
 31                     +"    2-----------------------------------增加歌曲
"
 32                     +"    3-----------------------------------删除歌曲
"
 33                     +"    4-----------------------------------显示所有歌曲
"
 34                     +"    5-----------------------------------退出系统
"
 35                     +"****************************************************
"
 36                     +"                                       **input [1-5]:");
 37                     String line = br.readLine();
 38                     int command=Integer.parseInt(line);
 39                     switch (command) {
 40                     case 1:
 41                         System.out.println("According to id or complete info?Input[1or2]");
 42                         line = br.readLine();
 43                         command=Integer.parseInt(line);
 44                         if(command==2) {
 45                             System.out.println("Input song's id");
 46                             String sid=br.readLine();
 47                             int id=Integer.parseInt(sid);
 48                             System.out.println("Input song's name");
 49                             String sname=br.readLine();
 50                             System.out.println("Input singer's name");
 51                             String singerName=br.readLine();
 52                             System.out.println("Input song's category");
 53                             String category=br.readLine();
 54                             Song song=new Song(id,sname,category,singerName);
 55                             print(service.search(song));
 56                         }
 57                         else {
 58                             System.out.println("Input song's id");
 59                             String sid=br.readLine();
 60                             int id=Integer.parseInt(sid);
 61                             print(service.search(id));
 62                         }
 63                         break;
 64                     case 2:
 65                         System.out.println("Input new song's id");
 66                         String sid=br.readLine();
 67                         int id=Integer.parseInt(sid);
 68                         System.out.println("Input new song's name");
 69                         String sname=br.readLine();
 70                         System.out.println("Input new singer's name");
 71                         String singerName=br.readLine();
 72                         System.out.println("Input song's category");
 73                         String category=br.readLine();
 74                         Song song=new Song(id,sname,category,singerName);
 75                         service.add(song);            
 76                         break;
 77                     case 3:
 78                         System.out.println("请输入待删除歌曲的编号");
 79                         sid=br.readLine();
 80                         id=Integer.parseInt(sid);
 81                         service.delete(id);
 82                         System.out.println("Delete seccessfully");
 83                         break;
 84                     case 4:
 85                         List<Song>list=service.trace();
 86                         print(list);
 87                         break;
 88                     case 5:
 89                         stop=true;
 90                         System.out.println("Byebye");
 91                         break;
 92                     default:
 93                         System.out.println("Error in input,try again");
 94                         break;
 95                     }
 96                 }
 97         }
 98         
 99     
100     
101     
102     
103     
104     public void print(Song song) {
105         System.out.printf("%-10s%-15s%-15s%-15s
","ID","NAME","SINGER","CATEGORY");
106         System.out.println("----------------------------------------------------------------------");
107         System.out.printf("%-15d%-20s%-25s%-20s
",
108                 song.getSid(),song.getSname(),song.getSinger(),song.getCategory());
109     }
110         
111     public void print(List<Song>list) {
112         System.out.printf("%-10s%-15s%-15s%-15s
","ID","NAME","SINGER","CATEGORY");
113         System.out.println("----------------------------------------------------------------------");
114         for(Song song: list)
115         System.out.printf("%-15d%-20s%-25s%-20s
",
116                 song.getSid(),song.getSname(),song.getSinger(),song.getCategory());    
117     }
118     
119     public static void main(String[] args) {
120         SongView view=new SongView();
121         SongService service=new SongService();
122         SongDao dao=new SongDao();
123         List<Song>list=new ArrayList<>();
124         dao.setSongList(list);
125         service.setDao(dao);
126         view.setSongService(service);
127         try {
128             view.show();
129         } catch (Exception e) {
130             // TODO: handle exception
131             System.out.println(e);
132         }
133     }
134     
135     public SongService getSongService() {
136         return service;
137     }
138 
139     public void setSongService(SongService songService) {
140         this.service = songService;
141     }
142 
143 }