关于导出歌单的问题

老师我这样写可以吗?有没有需要改进的地方，还有就是为什么for(int i=0;i<list.size();i++)
         {
         Song song = (Song)ois.readObject();
         System.out.println(song);
         }

能够读取到所有的歌曲类信息呢？

case 8:
      System.out.println("请输入要导出的播放列表名称:");
      String strPlayListName6=sc.next();
      PlayList pl6=plc.searchPlayListByName(strPlayListName6);
      
      if(pl6==null)
      {
       System.out.println("该播放列表不存在!");
       break;
      }else {
       try {
        FileOutputStream fos = new FileOutputStream(strPlayListName6+".txt");
        ObjectOutputStream oos=new ObjectOutputStream(fos);
        FileInputStream fis=new FileInputStream(strPlayListName6+".txt");
        ObjectInputStream ois=new ObjectInputStream(fis);
        
        List<Song> list=pl6.getMusicList();
        for(int i=0;i<list.size();i++)
        {
         oos.writeObject(list.get(i));
         oos.flush();
        }
        try {
         for(int i=0;i<list.size();i++)
         {
         Song song = (Song)ois.readObject();
         System.out.println(song);
         }
        } catch (ClassNotFoundException e) {
         e.printStackTrace();
        }
        
        fos.close();
        oos.close();
        fis.close();
        ois.close();
        
       } catch (FileNotFoundException e) {
        e.printStackTrace();
       } catch (IOException e) {
        e.printStackTrace();
       }
       
      }
      break;