批量下载baidu音乐主页的歌曲

[代码] 华语 package com;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Input http://www.fpzhuhai.com/linked/20130207.do; Stream;
import java.util.Date;

import net.sf.json.JSONObject;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

/**
 * 批量下载baidu音乐主页的歌曲.
 * @author gehouse
 *
 */
public class MusicSpider {
	
	public static final String BAI_DU_MUSIC = "http://music.baidu.com";
	
	private String saveDestinationPath;//下载保管途径
	
	public MusicSpider(String saveDestinationPath){
		
		if(!saveDestinationPath.endsWith("/")){
			saveDestinationPath  = "/"; 
		}
		this.saveDestinationPath = saveDestinationPath;
	}

	private Document initDocument(String url) {
		try {
			Document doc = Jsoup
					.connect(url)
					.header("User-Agent",
							"Mozilla/5.0 (Windows; U; Windows NT 5.2) Gecko/2008070208 Firefox/3.0.1")
					.header("Accept", "text ml,application/xhtml xml")
					.header("Accept-Language", "zh-cn,zh;q=0.5")
					.header("Accept-Charset", "GB2312,utf-8;q=0.7,*;q=0.7")
					.get();
			return doc;
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 取到下载连接.
	 * @param url
	 * @return
	 */
	private String getDownLoadLink(String url) {

		if(url.contains("artist")){
			return null;
		}
		url = BAI_DU_MUSIC   url;

		Document doc = initDocument(url);
		
		Element form = doc.getElementById("form");
		if(form == null){
			return null;
		}
		Elements linkLi = form.getElementsByTag("li");

		JSONObject json = JSONObject.fromObject(linkLi.get(0).attr("data-data"));
		String link = (String) json.get("link");
		if(link != null){
			link = link.substring(link.indexOf("?")   6, link.length());
		}

		return link;

	}
	
	/**
	 * 下载.
	 * @param downLoadlink
	 * @param saveName
	 * @param saveDestinationPath
	 */
	private void saveMusic(String downLoadlink, String saveName, String saveDestinationPath){
		
		System.out.print(saveName "---->  下载中......");
		Date d1 = new Date();
		try {
			HttpClient client = new HttpClient();
			GetMethod get = new GetMethod(downLoadlink);
			client.executeMethod(get);
			
			
			File file = new File(saveDestinationPath);
			if(!file.exists()){
				file.mkdirs();
			}
			file = new File(saveDestinationPath   saveName   ".mp3");
			
			FileOutputStream outputStream = new FileOutputStream(file);
			InputStream is = get.getResponseBodyAsStream();
			ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
			byte[] buff = new byte[1024]; // buff用于寄存循环读取的暂时数据
			int rc = 0;
			while ((rc = is.read(buff)) > 0) {
				swapStream.write(buff, 0, rc);
			}
			byte[] in_b = swapStream.toByteArray();
			outputStream.write(in_b);
			outputStream.close();
		} catch (HttpException e) {
			e.printStackTrace();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		Date d2 = new Date();
		System.out.println("	下载耗时：" ((d2.getTime()-d1.getTime()) / 1000) "秒");
	}

	public void catchMusic(){
		Document doc = initDocument(BAI_DU_MUSIC);
		
		Elements songList = doc.getElementsByClass("song-list");//取到歌曲列表
		for(int i = 0;i < songList.size();i  ){
			Elements labelLi = songList.get(i).getElementsByTag("li");
			
			for(int j = 0;j < labelLi.size();j  ){
				Elements labelA = labelLi.get(j).getElementsByTag("a");
				String musicName = labelA.get(0).attr("title");
				File file = new File(saveDestinationPath   musicName   ".mp3");
				if(!file.exists()){
					String href = labelA.get(0).attr("href");
					String downLoadlink = getDownLoadLink(href   "/download?__o=/song/"
							  href.substring(href.lastIndexOf("/")   1, href.length()));
					if(downLoadlink == null){
						continue;
					}
					saveMusic(downLoadlink, musicName, saveDestinationPath);
					
				}
			}
		}
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		MusicSpider ms = new MusicSpider("e:/baidu_music");
		ms.catchMusic();

	}

} http://www.szhaoexport.com/linked/20130207.do;