qq album

此文章完全转自他人博客（用于个人学习记录）

这个功能的实现关键在于找到每张图片的链接地址，之前一直不知道怎么找到，后来发现用SmartSniff分析数据包，很容易就找到了

/**
 * core class
 * 
 * @author wensefu.jerry.Ling<br/>
 *         wrote on 2011-1-28
 */
public class PhotoDownLoad {
 /*
  * sample uri: album:
  * http://xalist.photo.qq.com/fcgi-bin/fcg_list_album?uin=
  * 419758768&outstyle=2&t=0.7253889227680141&g_tk=5381 photo:
  * http://xaplist.
  * photo.qq.com/fcgi-bin/fcg_list_photo?uin=419758768&albumid=
  * e3b63b1c-2dce-4f86-ad02-c0f81a878615
  * &outstyle=json&t=0.9962191131376609&g_tk=5381
  */
 private static final String albumbase = "http://xalist.photo.qq.com/fcgi-bin/fcg_list_album?uin=";
 private static final String photobase = "http://xaplist.photo.qq.com/fcgi-bin/fcg_list_photo?uin=";
 private static final String charset = "gb2312";
 private static List<Album> albums; // 获取的所有相册
 private static final String savePath = "e://qqPhoto//"; // 图片保存位置的父目录
 private int curIndex = 0; // 每个相册当前正在下载的图片指针
 /**
  * 获取用户相册
  * 
  * @param qq
  * @return
  */
 public List<Album> getAlbums(String qq) {
  List<Album> result = new ArrayList<Album>();
  HttpClient client = new HttpClient();
  String getUri = albumbase + qq + "&outstyle=2"; // outstyle!=2服务器将以xml的形式返回结果,
              // 这里只以简单文本解析提取相关信息,不做xml解析了.
  HttpMethod method = new GetMethod(getUri);
  method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,
    charset);
  int status = 0;
  try {
   status = client.executeMethod(method);
   if (status != HttpStatus.SC_OK) {
    System.err.println("发生网络错误!");
    return null;
   }
  } catch (HttpException e) {
   e.printStackTrace();
   return null;
  } catch (IOException e) {
   e.printStackTrace();
   return null;
  }
  InputStream is = null;
  BufferedReader br = null;
  InputStreamReader isr = null;
  List<String> ids = new ArrayList<String>();
  List<String> names = new ArrayList<String>();
  List<Integer> totals = new ArrayList<Integer>();
  try {
   is = method.getResponseBodyAsStream();
   isr = new InputStreamReader(is);
   br = new BufferedReader(isr);
   String temp = null;
   while ((temp = br.readLine()) != null) {
    if (temp.contains("/"id/" :")) {
     String id = temp.substring(temp.indexOf("/"id/" :") + 8,
       temp.length() - 2);
     ids.add(id);
    }
    if (temp.contains("/"name/" :")) {
     String name = temp.substring(
       temp.indexOf("/"name/" :") + 10, temp.length() - 3);
     names.add(name);
    }
    if (temp.contains("/"total/" :")) {
     String total = temp
       .substring(temp.indexOf("/"total/" :") + 10,
         temp.length() - 1);
     totals.add(Integer.parseInt(total));
    }
    if (temp.contains("/"left/" :")) {
     break;
    }
   }
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   method.releaseConnection();
   try {
    br.close();
    isr.close();
    is.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
  for (int i = 0; i < ids.size(); i++) {
   Album album = new Album(ids.get(i), names.get(i), totals.get(i));
   result.add(album);
  }
  return result;
 }
 /**
  * 获取一个相册的图片信息
  * 
  * @param pid
  * @return
  */
 public List<Photo> getPhotoByAlbum(Album album, String qq) {
  List<Photo> result = new ArrayList<Photo>();
  HttpClient client = new HttpClient();
  System.out.println(album.getId());
  String getUri = photobase + qq + "&albumid=" + album.getId()
    + "&outstyle=json";
  HttpMethod method = new GetMethod(getUri);
  method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,
    charset);
  int status = 0;
  try {
   status = client.executeMethod(method);
   if (status != HttpStatus.SC_OK) {
    System.err.println("发生网络错误!");
    return null;
   }
  } catch (HttpException e) {
   e.printStackTrace();
   return null;
  } catch (IOException e) {
   e.printStackTrace();
   return null;
  }
  InputStream is = null;
  BufferedReader br = null;
  InputStreamReader isr = null;
  List<String> names = new ArrayList<String>();
  List<String> urls = new ArrayList<String>();
  try {
   is = method.getResponseBodyAsStream();
   isr = new InputStreamReader(is);
   br = new BufferedReader(isr);
   String temp = null;
   boolean sign = false;
   while ((temp = br.readLine()) != null) {
    int len = temp.length();
    if (temp.contains("/"pic/" : [")) {
     sign = true;
    }
    if (sign && temp.contains("/"name/" :")) {
     String name = temp.substring(
       temp.indexOf("/"name/" :") + 10, len - 2);
     names.add(name);
    }
    if (temp.contains("/"url/" :")) {
     String url = temp.substring(temp.indexOf("/"url/" :") + 9,
       len - 3);
     urls.add(url);
    }
    if (temp.contains(" ],")) {
     break;
    }
   }
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   method.releaseConnection();
   try {
    br.close();
    isr.close();
    is.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
  for (int i = 0; i < names.size(); i++) {
   Photo photo = new Photo();
   photo.setName(names.get(i));
   photo.setUrl(urls.get(i));
   photo.setAlbum(album);
   result.add(photo);
  }
  return result;
 }
 /**
  * 通过uri下载远程图片到本地
  * 
  * @param uri
  * @param name
  *            要保存的图片名(非路径)
  */
 public void saveImgFromUrl(Photo photo, String qq) {
  URL imgurl = null;
  BufferedInputStream bis = null;
  OutputStream os = null;
  try {
   imgurl = new URL(photo.getUrl());
   bis = new BufferedInputStream(imgurl.openStream());
   byte[] buffer = new byte[512];
   File path = new File(savePath + "//" + qq + "//"
     + photo.getAlbum().getName().trim());
   if (!path.exists()) {
    path.mkdirs();
   }
   os = new FileOutputStream(new File(path, photo.getName().trim()
     + ".jpeg"));
   int len = 0;
   while ((len = bis.read(buffer)) > 0) {
    os.write(buffer, 0, len);
   }
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   try {
    bis.close();
    os.flush();
    os.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
 }
 /**
  * 下载一个相册的图片
  * 
  * @param index
  *            相册序号
  */
 public void savePhoto(final int index, final String qq) {
  Album album = albums.get(index);
  final List<Photo> photos = this.getPhotoByAlbum(album, qq);
  if (photos == null || photos.size() == 0) {
   System.out.println("相册" + album.getName() + "为空.");
   return;
  }
  final int maxThreadCnt = 10; // 每个相册最多开启10个线程进行下载
  final int total = album.getCnt();
  int realThreadCnt = total >= maxThreadCnt ? maxThreadCnt : total; // 实际下载一个相册的线程数
  /**
   * 线程驱动下载任务
   * 
   * @author wensefu.jerry.Ling<br/>
   *         wrote on 2011-1-29
   */
  class DownLoadTask implements Runnable {
   int id; // 线程标识
   int pindex;// 下载的图片指针
   public DownLoadTask(int id, int pindex) {
    this.id = id;
    this.pindex = pindex;
   }
   @Override
   public void run() {
    while (curIndex <= total - 1) {
     int temp = pindex;
     pindex = curIndex;
     curIndex++;
     Photo photo = photos.get(temp);
     System.out.println("线程" + (index + 1) + "_" + id + "开始下载第"
       + (index + 1) + "个相册第" + (pindex + 1) + "张图片...");
     saveImgFromUrl(photo, qq);
     System.out.println("线程" + (index + 1) + "_" + id + "完成第"
       + (index + 1) + "个相册第" + (pindex + 1) + "张图片下载");
    }
   }
  }
  ExecutorService exec = Executors.newCachedThreadPool();
  /*
   * 初始化各线程状态 此处给每个线程分配一个下载起始点
   */
  for (int i = 0; i < realThreadCnt; i++) {
   DownLoadTask task = new DownLoadTask(i + 1, i);
   exec.execute(task);
  }
  exec.shutdown();
 }
 public static void main(String[] args) {
  PhotoDownLoad pdl = new PhotoDownLoad();
  String qq = "402493283";
  albums = pdl.getAlbums(qq);
  if (albums == null || albums.size() == 0) {
   System.err.println("相册信息获取失败,可能是用户没有开放权限.");
   return;
  }
  int len = albums.size();
  System.out.println("相册信息获取成功,用户共有" + len + "个相册.");
  for (int i = 0; i < len; i++) { // 考虑到相册数量不会很多,相册采用顺序下载，不使用异步下载
   System.out.println("开始下载第" + (i + 1) + "个相册...");
   pdl.savePhoto(i, qq);
   pdl.curIndex = 0;
   System.out.println("第" + (i + 1) + "个相册下载完成.");
  }
 }
}

 

/**
 * 图片实体类
 * 
 * @author wensefu.jerry.Ling<br/>
 *         wrote on 2011-1-28
 */
public class Photo {
	private Album album;
	private String url;
	private String name;
	//getter and setter
         ....
}

/**
 * 相册实体类
 * 
 * @author wensefu.jerry.Ling<br/>
 *         wrote on 2011-1-28
 */
public class Album {
	private String id;
	private String name;
	private int cnt; // 图片张数
	public Album() {
	}
	/**
	 * @param id
	 * @param name
	 * @param cnt
	 */
	public Album(String id, String name, int cnt) {
		super();
		this.id = id;
		this.name = name;
		this.cnt = cnt;
	}
	//getter and setter
         ....
}