关于导出歌单文本有乱码,主播列表名字设中文总出错只能设英文

关于导出歌单文本有乱码,主播列表名字设中文总出错只能设英文

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package com.imooc.musicplayer;
import java.io.Serializable;
public class Song implements Serializable{
    private String id;// 歌曲ID
    private String name;// 歌曲名称
    private String singer;// 歌曲演唱者
    // 构造方法
    public Song() {
 
    }
    public Song(String id, String name, String singer) {
        setId(id);
        setName(name);
        setSinger(singer);
    }
    // get、set方法
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSinger() {
        return singer;
    }
    public void setSinger(String singer) {
        this.singer = singer;
    }
    //hashCode和equals方法
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + ((singer == null) ? 0 : singer.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj.getClass() == this.getClass()) {
            Song song = (Song) obj;
            return (song.getId().equals(this.getId()))
                    && (song.getName().equals(this.getName()) 
                            && (song.getSinger().equals(this.getSinger())));
        }
        return false;
    }
 
    //toString方法
    @Override
    public String toString() {
        return "歌曲信息:歌曲id为:" + id + ", 歌曲名称为:" + name + ",歌曲演唱者为:" + singer ;
    }
 
     
}
package com.imooc.musicplayer;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
 
public class PlayList implements Serializable{
    private String playListName;//播放列表名称
    public List<Song> musicPlayList;//播放列表存储的集合
    //构造方法
    public PlayList() {
    }
    public PlayList(String playListName) {
        setPlayListName(playListName);
        musicPlayList=new ArrayList<Song>();
    }
    //getset方法
    public String getPlayListName() {
        return playListName;
    }
    public void setPlayListName(String playListName) {
        this.playListName = playListName;
    }
    public List<Song> getMusicPlayList() {
        return musicPlayList;
    }
    public void setMusicPlayList(List<Song> musicPlayList) {
        this.musicPlayList = musicPlayList;
    }
    /**
     * 添加歌曲到播放列表的方法
     * @param s Song类型对象
     */
    public void addToPlayList(Song s) {
        boolean flag=false;
        for(Song song:musicPlayList) {
            if(song.equals(s)) {
                flag=true;
                break;
            }
        }
        if(flag) {
            System.out.println("歌曲已存在,不需重复添加!");
        }else {
            musicPlayList.add(s);
        }
    }
    /**
     * 显示列表里所有歌曲信息
     */
    public void displayAllSong() {
        System.out.println(this.getPlayListName()+"列表里所有歌曲信息为:");
        for(Song s:musicPlayList) {
            System.out.println(s);
        }
    }
    /**
     * 通过Id查找歌曲
     * @param id歌曲id
     * @return Song类型对象
     */
    public Song searchById(String id) {
        Song s=null;
        for(Song song:musicPlayList) {
            if(song.getId().equals(id)) {
                s=song;
                break;
            }
        }
        return s;
    }
    /**
     * 通过名字查找歌曲
     * @param name歌曲名字
     * @return Song类型对象
     */
    public Song searchByName(String name) {
        Song s=null;
        for(Song song:musicPlayList) {
            if(song.getName().equals(name)) {
                s=song;
                break;
            }
        }
        return s;
    }
    /**
     * 修改歌曲信息
     * @param id歌曲id
     * @param song Song类型对象
     */
    public void updateSong(String id,Song song) {
        Song s=this.searchById(id);
        if(s==null) {
            System.out.println("id为"+id+"的歌曲不存在");
        }else {
            this.musicPlayList.remove(s);
            this.musicPlayList.add(song);
            System.out.println("修改成功!");
        }
    }
    /**
     * 删除歌曲
     * @param id 歌曲id
     */
    public void deleteSong(String id) {
        Song s=this.searchById(id);
        this.musicPlayList.remove(s);
        System.out.println("删除成功!");
    }
}
package com.imooc.musicplayer;
 
import java.io.Serializable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
 
/**
 * 播放列表集合
 * @author Administrator
 *
 */
public class PlayListCollection implements Serializable{
    Map<String,PlayList> playMap;//存放播放列表的集合<名字,PlayList对象>
    public PlayListCollection() {
        playMap=new HashMap<String,PlayList>();
    }
    public Map<String, PlayList> getPlayMap() {
        return playMap;
    }
    public void setPlayMap(Map<String, PlayList> playMap) {
        this.playMap = playMap;
    }
    /**
     * 添加播放列表
     */
    public void addPlayList(PlayList p) {
        playMap.put(p.getPlayListName(), p);
    }
    /**
     * 删除播放列表
     */
    public void deletePlayList(PlayList p) {
        playMap.remove(p.getPlayListName());
        System.out.println("删除成功!");
    }
    /**
     * 通过名字查找播放列表
     * @param p 列表的对象
     * @return 列表的对象
     */
    public PlayList searchByName(String name) {
        PlayList pl=null;
        Set<String> playListSet=playMap.keySet();
        for(String n:playListSet) {
            if(n.equals(name)) {
                pl=playMap.get(n);
                break;
            }
        }
        return pl;
    }
    /**
           * 显示所有列表的名称
     */
    public void displayListName() {
        Set<String> nameSet=playMap.keySet();
        System.out.println("所有的播放列表名称为:");
        for(String n:nameSet) {
            System.out.println(n);
        }
    }
}
package com.imooc.musicplayer;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.List;
import java.util.Scanner;
 
public class TestDemo {
    public void testSong() {
        Song s1 = new Song("s001""两只老虎""小太阳合唱团");
        Song s2 = new Song("s002""小燕子""彩虹合唱团");
        Song s3 = new Song("s003""读书郎""黑天鹅合唱团");
        Song s4 = new Song("s003""读书郎""黑天鹅合唱团");
        System.out.println(s1);
        System.out.println("s1==s2?" + s1.equals(s2));
        System.out.println("s3==s3?" + s3.equals(s3));
        System.out.println("s3==s4?" + s3.equals(s4));
    }
 
    public void testPlayList() {
        Song s1 = new Song("s001""两只老虎""小太阳合唱团");
        Song s2 = new Song("s002""小燕子""彩虹合唱团");
        Song s3 = new Song("s003""读书郎""黑天鹅合唱团");
        Song s4 = new Song("s004""读书郎""黑天鹅合唱团");
        // 创建PlayList对象
        PlayList p = new PlayList("主播放器");
        p.addToPlayList(s1);
        p.addToPlayList(s2);
        p.addToPlayList(s3);
        p.addToPlayList(s4);
        // 显示播放列表所有歌曲信息
        p.displayAllSong();
        // 通过id查找歌曲
        System.out.println("通过id查找歌曲");
        Song song1 = p.searchById("s001");
        if (song1 == null) {
            System.out.println("该歌曲不存在");
        else {
            System.out.println(song1);
        }
        // 通过名字查找歌曲
        System.out.println("通过名字查找歌曲");
        Song song2 = p.searchByName("两只老虎");
        if (song2 == null) {
            System.out.println("该歌曲不存在");
        else {
            System.out.println(song2);
        }
        // 修改歌曲信息
        Song s = new Song("s004""蜗牛与黄鹂鸟""水木年华组合");
        p.updateSong("s004", s);
        p.displayAllSong();
        // 删除歌曲
        p.deleteSong("s001");
        p.displayAllSong();
    }
 
    public void testPlayListCollection() {
        PlayListCollection plc = new PlayListCollection();
        Song s1 = new Song("s001""两只老虎""小太阳合唱团");
        Song s2 = new Song("s002""小燕子""彩虹合唱团");
        Song s3 = new Song("s003""读书郎""黑天鹅合唱团");
        Song s4 = new Song("s004""读书郎""黑天鹅合唱团");
        // 创建PlayList对象
        PlayList p = new PlayList("主播放器");
        p.addToPlayList(s1);
        p.addToPlayList(s2);
        p.addToPlayList(s3);
        p.addToPlayList(s4);
        // 创建PlayList对象
        PlayList p1 = new PlayList("最喜欢的歌曲");
        p1.addToPlayList(p.getMusicPlayList().get(0));
        p1.addToPlayList(p.getMusicPlayList().get(1));
        // 添加进集合
        plc.addPlayList(p);
        plc.addPlayList(p1);
        System.out.println("显示所有列表名称:");
        p.displayAllSong();
        p1.displayAllSong();
        plc.displayListName();
        plc.deletePlayList(p1);
        System.out.println("显示所有列表名称:");
        plc.displayListName();
        System.out.println(plc.searchByName("主播放器").getPlayListName());
    }
 
    // 主菜单
    public void mainMenu() {
        System.out.println("*******************************************");
        System.out.println("             **主菜单**");
        System.out.println("             1——播放列表管理");
        System.out.println("             2——播放器管理");
        System.out.println("             0——退出");
        System.out.println("*******************************************");
    }
// 播放列表管理菜单
    public void playListMenu() {
        System.out.println("*******************************************");
        System.out.println("             **播放列表管理**");
        System.out.println("             1——将歌曲添加到主播放列表");
        System.out.println("             2——将歌曲添加到普通播放列表");
        System.out.println("             3——通过歌曲id查询播放列表中的歌曲");
        System.out.println("             4——通过歌曲名称查询播放列表中的歌曲");
        System.out.println("             5——修改播放列表中的歌曲");
        System.out.println("             6——删除播放列表中的歌曲");
        System.out.println("             7——显示播放列表中的所有歌曲");
        System.out.println("             8——导出歌单");
        System.out.println("             9——返回上一级菜单");
        System.out.println("*******************************************");
    }
 
    // 播放器菜单
    public void playerMenu() {
        System.out.println("*******************************************");
        System.out.println("             **播放器管理**");
        System.out.println("             1——向播放器添加播放列表");
        System.out.println("             2——从播放器删除播放列表");
        System.out.println("             3——通过名字查询播放列表信息");
        System.out.println("             4——显示所有播放列表名称");
        System.out.println("             9——返回上一级菜单");
        System.out.println("*******************************************");
    }
    // 主流程
    public void test() {
        Scanner sc = new Scanner(System.in);
        PlayList mainPlay = new PlayList("mainPlayer");
        PlayListCollection plc=new PlayListCollection();
        plc.addPlayList(mainPlay);
        PlayList newPlayList;
        while (true) {
            this.mainMenu();
            System.out.println("请输入数字:");
            try {
                int n = sc.nextInt();
                if (n == 0) {
                    System.out.println("结束程序!");
                    break;
                else if (n == 1) {
                    while (true) {
                        this.playListMenu();
                        System.out.println("请输入数字:");
                        int no = sc.nextInt();
                        if (no == 9) {
                            System.out.println("返回上一级菜单");
                            break;
                        }
                        switch (no) {
                        case 1:
                            System.out.println("将歌曲添加到主播放列表");
                            System.out.println("要添加到主播放列表的歌曲数量:");
                            int num = sc.nextInt();
                            for (int i = 1; i <= num; i++) {
                                System.out.println("请输入第"+i+"首歌曲的信息:");
                                System.out.println("请输入歌曲id:");
                                String id = sc.next();
                                System.out.println("请输入歌曲名称:");
                                String name = sc.next();
                                System.out.println("请输入歌曲演唱者:");
                                String singer = sc.next();
                                Song s = new Song(id, name, singer);
                                mainPlay.addToPlayList(s);
                            }
                            System.out.println("添加成功");
                            break;
                        case 2:
                            System.out.println("将歌曲添加到普通播放列表");
                            System.out.println("请输入要添加进的播放列表名称:");
                            String name=sc.next();
                            newPlayList=plc.searchByName(name);
                            if(newPlayList==null) {
                                System.out.println("请先添加播放列表");
                            }else {
                                System.out.println("请输入要添加的歌曲的名称:");
                                String strName=sc.next();
                                Song song=newPlayList.searchByName(strName);
                                if(song==null) {
                                    System.out.println("主播放器中没有该歌曲,请输入歌曲的详细信息:");
                                    System.out.println("该歌曲的id为:");
                                    String strId=sc.next();
                                    System.out.println("该歌曲的演唱者为:");
                                    String strSinger=sc.next();
                                    Song s=new Song(strId,strName,strSinger);
                                    mainPlay.addToPlayList(s);
                                    newPlayList.addToPlayList(s);
                                    System.out.println("添加成功");
                                }else {
                                    newPlayList.addToPlayList(song);
                                    if(newPlayList.searchByName(strName)==null) {
                                    System.out.println("添加成功");
                                    }
                                    }
                            }
                            break;
                        case 3:
                            System.out.println("通过歌曲id查询播放列表中的歌曲");
                            System.out.println("请输入要查询的列表名称:");
                            String pn=sc.next();
                            PlayList pla=plc.searchByName(pn);
                            if(pla==null) {
                                System.out.println("该列表不存在,请先添加列表");
                                break;
                            }else {
                                System.out.println("请输入要查询的id:");
                                String id=sc.next();
                                Song s=pla.searchById(id);
                                if(s==null) {
                                    System.out.println("id为"+id+"的歌曲在名为"+pn+"的播放列表中不存在");
                                    break;
                                }else {
                                    System.out.println("找到了");
                                    System.out.println(s);
                                }
                            }
                            break;
                        case 4:
                            System.out.println("通过歌曲名称查询播放列表中的歌曲");
                            System.out.println("请输入要查询的列表名称:");
                            String pln=sc.next();
                            PlayList ply=plc.searchByName(pln);
                            if(ply==null) {
                                System.out.println("该列表不存在,请先添加列表");
                                break;
                            }else {
                                System.out.println("请输入要查询的歌曲名称:");
                                String sn=sc.next();
                                Song s=ply.searchByName(sn);
                                if(s==null) {
                                    System.out.println("名称为"+sn+"的歌曲在名为"+pln+"的播放列表中不存在");
                                    break;
                                }else {
                                    System.out.println("找到了");
                                    System.out.println(s);
                                }
                            }
                            break;
                        case 5:
                            System.out.println("修改播放列表中的歌曲");
                            System.out.println("请输入要修改的列表名称:");
                            String playn=sc.next();
                            PlayList plyl=plc.searchByName(playn);
                            if(plyl==null) {
                                System.out.println("该列表不存在,请先添加列表");
                                break;
                            }else {
                                System.out.println("请输入要修改的歌曲id:");
                                String sId=sc.next();
                                Song so=plyl.searchById(sId);
                                if(so==null) {
                                    System.out.println("该歌曲不存在,请重新输入");
                                    break;
                                }else {
                                    System.out.println("请输入修改歌曲的详细信息:");
                                    System.out.println("请输入歌曲id:");
                                    String newId=sc.next();
                                    System.out.println("请输入歌曲名称:");
                                    String newName=sc.next();
                                    System.out.println("请输入歌曲演唱者:");
                                    String newSinger=sc.next();
                                    Song newSong=new Song(newId,newName,newSinger);
                                    if(plyl.equals(mainPlay)) {
                                    plyl.updateSong(sId, newSong);
                                    }else {
                                        plyl.updateSong(sId, newSong);
                                        mainPlay.updateSong(sId, newSong);
                                    }
                                }
                            }
                            break;
                        case 6:
                            System.out.println("删除播放列表中的歌曲");
                            System.out.println("请输入要删除的歌曲所在列表名称:");
                            String plin=sc.next();
                            PlayList pliy=plc.searchByName(plin);
                            if(pliy==null) {
                                System.out.println("该列表不存在,请先添加列表");
                                break;
                            }else {
                                System.out.println("请输入要删除歌曲的id:");
                                String deleId=sc.next();
                                Song deleSong=pliy.searchById(deleId);
                                if(deleSong==null) {
                                    System.out.println("该歌曲不存在,请重新输入");
                                    break;
                                }else {
                                    pliy.deleteSong(deleId);
                                }
                            }
                            break;
                        case 7:
                            System.out.println("显示播放列表中的所有歌曲");
                            System.out.println("请输入要删除的歌曲所在列表名称:");
                            String plisn=sc.next();
                            PlayList plisy=plc.searchByName(plisn);
                            if(plisy==null) {
                                System.out.println("该列表不存在,请先添加列表");
                                break;
                            }else {
                                plisy.displayAllSong();
                            }
                            break;
                        case 8:
                            System.out.println("导出歌单");
                            System.out.println("请输入要导出歌单的列表名称:");
                            String tn=sc.next();
                            PlayList tpl=plc.searchByName(tn);
                            if(tpl==null) {
                                System.out.println("该列表不存在,请重新输入");
                                break;
                            }else {
                            try {
                                FileOutputStream fos=new FileOutputStream(tn+".txt");
                                ObjectOutputStream oos=new ObjectOutputStream(fos);
                                FileInputStream fis=new FileInputStream(tn+".txt");
                                ObjectInputStream ois=new ObjectInputStream(fis);
                                for(Song sg:tpl.getMusicPlayList()) {
                                    oos.writeObject(sg);
                                    oos.flush();
                                    System.out.println(((Song)ois.readObject()));
                            }
                                fos.close();
                                oos.close();
                                fis.close();
                                ois.close();
                        catch (FileNotFoundException e) {
                                // TODO Auto-generated catch block
                                //e.printStackTrace();
                            }catch (ClassNotFoundException e) {
                                // TODO Auto-generated catch block
                                //e.printStackTrace();
                            }catch (IOException e) {
                                // TODO Auto-generated catch block
                                //e.printStackTrace();
                            }
                            }
                            break;
                        default:
                            System.out.println("没有该数字对应的操作");
                            break;
                        }
                    }
                else if (n == 2) {
                    while(true) {
                    this.playerMenu();
                    System.out.println("请输入数字:");
                    int nu = sc.nextInt();
                    if (nu == 9) {
                        System.out.println("返回上一级菜单");
                        break;
                    }
                    switch (nu) {
                    case 1:
                        System.out.println("向播放器添加播放列表");
                        System.out.println("请输入播放列表的名称:");
                        String name=sc.next();
                        newPlayList=new PlayList(name);
                        plc.addPlayList(newPlayList);
                        System.out.println("添加成功");
                        break;
                    case 2:
                        System.out.println("从播放器删除播放列表");
                        System.out.println("请输入要删除列表的名字:");
                        String cpn=sc.next();
                        PlayList pl1=plc.searchByName(cpn);
                        if(pl1==null) {
                            System.out.println("该列表不存在,请重新输入");
                            break;
                        }else {
                            plc.deletePlayList(pl1);
                            System.out.println("删除成功");
                        }
                        break;
                    case 3:
                        System.out.println("通过名字查询播放列表信息");
                        System.out.println("请输入要查询列表的名字:");
                        String pcn=sc.next();
                        PlayList pl2=plc.searchByName(pcn);
                        if(pl2==null) {
                            System.out.println("该列表不存在,请重新输入");
                            break;
                        }else {
                            System.out.println("删除成功");
                            plc.getPlayMap().get(pcn).displayAllSong();
                        }
                        break;
                    case 4:
                        System.out.println("显示所有播放列表名称");
                        plc.displayListName();
                        break;
                    default:
                        System.out.println("没有该数字对应的操作");
                        break;
                    }
                    }
                else {
                    System.out.println("输入的数字有误,请重新输入");
                }
            catch (java.util.InputMismatchException e) {
                String s = sc.next();
                System.out.println("输入的不是整数型数字,请重新输入");
            }
        }
    }
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        TestDemo td = new TestDemo();
        // td.testSong();
        // td.testPlayList();
        // td.testPlayListCollection();
        td.test();
    }
}

为什么我导出的歌单文本是乱码?设置主播放列表名字用中文,写主流程的searchById的方法时发现有时候就找不到播放列表,后来我把主播放列表名字用英文,一切都正常了,这是怎么回事呢?

正在回答

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2回答

同学你好,主播列表名字设中文的问题我在以下链接中回答了同学哦~

http://class.imooc.com/course/qadetail/125389

导出歌单文件,是输出对象到txt,就是会乱码。

乱码没问题的,如果能读取就是正确的。

如果我的回答解决了你的疑惑,请采纳。祝:学习愉快~

好帮手慕柯南 2019-06-14 12:09:44

同学你好!可能是由于同学eclipse工作空间的编码,和java文件的编码格式不同导致的。同学可以按照以下步骤来更改测试一下

  1. 更改eclipse工作空间的编码

    window -> preferences ->  General -> Workspace

    http://img1.sycdn.imooc.com//climg/5d031ccc0001963408270710.jpg

  2. 修改java文件的编码

    window -> preferences ->  General -> Content Types

    右边找到要修改的文件的类型,我这边以*.java为例

    在下面的Default encoding,输入框中输入UTF-8->Update->OK 

    http://img1.sycdn.imooc.com//climg/5d031dc70001143606790561.jpg

如果我的回答结局解决了你的疑惑,请采纳,祝学习愉快~

  • 提问者 慕娘0924178 #1
    还是没有解决主播列表名字设中文总出错只能设英文的问题,还有歌单文本有乱码这个问题又该怎么解决呢
    2019-06-15 00:29:07
  • 好帮手慕柯南 回复 提问者 慕娘0924178 #2
    建议同学重新创建一个项目测试一下呢。祝学习愉快~
    2019-06-15 11:22:00
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