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

 package ex8;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

public class Song {


    private int sid;
    private String sname;
    private String category;
    private String singer;

    public Song() {
        
    }

    public Song(int sid, String sname, String category, String singer) {
        super();
        this.sid = sid;
        this.sname = sname;
        this.category = category;
        this.singer = singer;
    }

    public int getSid() {
        return sid;
    }

    public void setSid(int sid) {
        this.sid = sid;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getSinger() {
        return singer;
    }

    public void setSinger(String singer) {
        this.singer = singer;
    }
    
    
}

SongDao.java

package ex8;

import java.util.List;

public class SongDao {
    
    private List<Song> songList;
    
    public SongDao() {
        
    }

    public SongDao(List<Song> songList) {
        super();
        this.songList = songList;
    }

//    新增歌曲 
    public void add(Song song) {
        songList.add(song);
    }
    
//    查询歌曲
//    按id查找
    public Song search(int sid) {
        for(Song song : songList) {
            if(song.getSid()==sid){
                return song;
            }
        }
        return null;
    }
//    按对象查找
    public Song search(Song song) {
        if(song==null) {
            return null;
        }
        return search(song.getSid());
    }
    
//    删除歌曲
//按id删除歌曲
    public void delete(int sid) {
        Song song=search(sid);
        if(song!=null) {
            songList.remove(song);
        }
    }
//按对象删除歌曲
    public void delete(Song song) {
        if(song!=null) {
            delete(song.getSid());
        }
    }
    
    public List<Song> getSongList() {
        return songList;
    }

    public void setSongList(List<Song> songList) {
        this.songList = songList;
    }
}

SongService.java

package ex8;

import java.util.List;

import javax.swing.Spring;

public class SongService {
    private SongDao dao;

    public SongService() {
        super();
        // TODO Auto-generated constructor stub
    }

    public SongService(SongDao dao) {
        super();
        this.dao = dao;
    }

    public void add(Song song) {
        dao.add(song);
    }
    
    public Song search(int sid) {
        return dao.search(sid);
    }
    
    public Song search(Song song) {
        return dao.search(song);
    }

    public void delete(Song song) {
        dao.delete(song);
    }
    
    public void delete(int id) {
        dao.delete(id);
    }
    

    

    public List<Song> trace(){
        return dao.getSongList();
    }    

    public void alter(Song song) {
        
    }
    
    public SongDao getDao() {
        return dao;
    }

    public void setDao(SongDao dao) {
        this.dao = dao;
    }
    

}

SongView.java

 package ex8;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.util.ArrayList;
import java.util.List;
import javax.swing.text.AbstractDocument.BranchElement;

public class SongView {

    private SongService service;

    public SongView() {
        super();
        // TODO Auto-generated constructor stub
    }

    public SongView(SongService service) {
        super();
        this.service = service;
    }
    
    public void show() throws Exception{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        boolean stop=false;
        while(!stop){
            System.out.println("****************************************************
"
                    +"                                       **歌曲管理** 
"
                    +"    1-----------------------------------查找歌曲
"
                    +"    2-----------------------------------增加歌曲
"
                    +"    3-----------------------------------删除歌曲
"
                    +"    4-----------------------------------显示所有歌曲
"
                    +"    5-----------------------------------退出系统
"
                    +"****************************************************
"
                    +"                                       **input [1-5]:");
                    String line = br.readLine();
                    int command=Integer.parseInt(line);
                    switch (command) {
                    case 1:
                        System.out.println("According to id or complete info?Input[1or2]");
                        line = br.readLine();
                        command=Integer.parseInt(line);
                        if(command==2) {
                            System.out.println("Input song's id");
                            String sid=br.readLine();
                            int id=Integer.parseInt(sid);
                            System.out.println("Input song's name");
                            String sname=br.readLine();
                            System.out.println("Input singer's name");
                            String singerName=br.readLine();
                            System.out.println("Input song's category");
                            String category=br.readLine();
                            Song song=new Song(id,sname,category,singerName);
                            print(service.search(song));
                        }
                        else {
                            System.out.println("Input song's id");
                            String sid=br.readLine();
                            int id=Integer.parseInt(sid);
                            print(service.search(id));
                        }
                        break;
                    case 2:
                        System.out.println("Input new song's id");
                        String sid=br.readLine();
                        int id=Integer.parseInt(sid);
                        System.out.println("Input new song's name");
                        String sname=br.readLine();
                        System.out.println("Input new singer's name");
                        String singerName=br.readLine();
                        System.out.println("Input song's category");
                        String category=br.readLine();
                        Song song=new Song(id,sname,category,singerName);
                        service.add(song);            
                        break;
                    case 3:
                        System.out.println("请输入待删除歌曲的编号");
                        sid=br.readLine();
                        id=Integer.parseInt(sid);
                        service.delete(id);
                        System.out.println("Delete seccessfully");
                        break;
                    case 4:
                        List<Song>list=service.trace();
                        print(list);
                        break;
                    case 5:
                        stop=true;
                        System.out.println("Byebye");
                        break;
                    default:
                        System.out.println("Error in input,try again");
                        break;
                    }
                }
        }
        
    
    
    
    
    
    public void print(Song song) {
        System.out.printf("%-10s%-15s%-15s%-15s
","ID","NAME","SINGER","CATEGORY");
        System.out.println("----------------------------------------------------------------------");
        System.out.printf("%-15d%-20s%-25s%-20s
",
                song.getSid(),song.getSname(),song.getSinger(),song.getCategory());
    }
        
    public void print(List<Song>list) {
        System.out.printf("%-10s%-15s%-15s%-15s
","ID","NAME","SINGER","CATEGORY");
        System.out.println("----------------------------------------------------------------------");
        for(Song song: list)
        System.out.printf("%-15d%-20s%-25s%-20s
",
                song.getSid(),song.getSname(),song.getSinger(),song.getCategory());    
    }
    
    public static void main(String[] args) {
        SongView view=new SongView();
        SongService service=new SongService();
        SongDao dao=new SongDao();
        List<Song>list=new ArrayList<>();
        dao.setSongList(list);
        service.setDao(dao);
        view.setSongService(service);
        try {
            view.show();
        } catch (Exception e) {
            // TODO: handle exception
            System.out.println(e);
        }
    }
    
    public SongService getSongService() {
        return service;
    }

    public void setSongService(SongService songService) {
        this.service = songService;
    }

}