java实现优酷视频地址解析示例代码分享

List<Video> videos = new ArrayList<Video>();JSONObject data;//json就是刚获得的响应，类型为String。data = JSONObject.fromObject(json).getJSONArray("data").getJSONObject(0);double seed = Double.valueOf(data.getString("seed"));String title = data.getString("title");String fileid = data.getJSONObject("streamfileids").getString("flv");//如果要下的是mp4格式的话String realFileid = getFileID(fileid, seed);            //把flv改成mp4（前提是这个节点存在）String fileid1 = realFileid.substring(0, 8);//解码出来的id分成两部分，中间要插入视频分段String fileid2 = realFileid.substring(10);JSONArray segs = data.getJSONObject("segs").getJSONArray("flv");//segs部分解析for (Iterator iterator = segs.iterator(); iterator.hasNext();) {    JSONObject object = (JSONObject) iterator.next();    int order = object.getInt("no");    String size = object.getString("size");    int seconds = object.getInt("seconds");    String key = object.getString("k");    String no = String.format("%1$02x", order);    String youUrl = "http://f.youku.com/player/getFlvPath/sid/" + "00_"        + no + "/st/flv/fileid/" + fileid1 + no + fileid2 + "?K="        + key;              videos.add(new Video(order, seconds, youUrl, size, key, title));}

private String getFileID(String fileid, double seed) {    String mixed = getFileIDMixString(seed);    String[] ids = fileid.split("\\*");    StringBuilder realId = new StringBuilder();    int idx;    for (int i = 0; i < ids.length; i++) {        idx = Integer.parseInt(ids[i]);        realId.append(mixed.charAt(idx));    }    return realId.toString();}private String getFileIDMixString(double seed) {    StringBuilder mixed = new StringBuilder();    StringBuilder source = new StringBuilder(        "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\\:._-1234567890");    int index, len = source.length();    for (int i = 0; i < len; ++i) {        seed = (seed * 211 + 30031) % 65536;        index = (int) Math.floor(seed / 65536 * source.length());        mixed.append(source.charAt(index));        source.deleteCharAt(index);    }    return mixed.toString();}