playlistreader.java

用Java编写的一个可下载MP3

/*
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 * and open the template in the editor.
 */

package org.serain.shmily.player;

import org.serain.shmily.vo.Track;
import java.io.*;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Administrator
 */
public class PlayListReader {
    public static List<Track> getPlayList() {
        FileReader fr = null;
        List<Track> list=null;
        try {
             list= new ArrayList<Track>();
            fr = new FileReader("./data/playlist.txt");
            BufferedReader isr = new BufferedReader(fr);
            String line;         
            while ((line = isr.readLine()) != null) {
                String[] s=line.split(",");
                Track track=new Track();
                track.setName(s[0]);
                track.setPath(s[1]);
                list.add(track);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                fr.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return list;
       /* List<Track> list=new ArrayList<Track>();
        List pathList=new ArrayList();
        pathList=getPathList();
        Iterator i=  pathList.iterator();
        while(i.hasNext()){
            String path=(String)i.next();
            String[] names=path.split("/");
            String name=names[names.length-1];
            Track track=new Track();
            track.setName(name);
            track.setPath(path);
            list.add(track);
        }
        return list;*/
 
    }
    public static List<String> getPathList(){ 
       List<Track> list= getPlayList();
       List<String> pathList= new ArrayList<String>();
       Iterator ite=list.iterator();
       while(ite.hasNext()){
           Track vo=(Track)ite.next();
           pathList.add(vo.getPath());
       }
       return pathList;
    }
    public static void savePlayList(List<Track> list){
        FileWriter fw=null;
        try{
            fw=new FileWriter("./data/playlist.txt");
            BufferedWriter bw=new BufferedWriter(fw);
            for(Track track:list){
               bw.write(track.getName());
               bw.write(",");
               bw.write(track.getPath());
               bw.write("\r\n");
               bw.flush();
            }
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            try {
                fw.close();
            } catch (IOException ex) {
                Logger.getLogger(PlayListReader.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
/*    public static void savePlayList(List<Track> list) {
        RandomAccessFile fr=null;
        try{
            fr=new RandomAccessFile(new File("./data/playlist.txt"),"rw");
            for(Track track:list){
               fr.writeUTF(track.getName());
               fr.writeBytes(",");
               fr.writeUTF(track.getPath());
               fr.writeBytes("\r\n");
            }
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            try {
                fr.close();
            } catch (IOException ex) {
                Logger.getLogger(PlayListReader.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
  public static void savePath(Track track) {
        RandomAccessFile fr=null;
        try{
            fr=new RandomAccessFile(new File("./data/playlist.txt"),"rw");
               fr.seek(fr.length());
               fr.writeUTF(track.getPath());
               fr.writeBytes("\r\n");
           
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            try {
                fr.close();
            } catch (IOException ex) {
                Logger.getLogger(PlayListReader.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
*/
}