java获取优酷视频地址示例

import java.io.bufferedreader;
import java.io.inputstreamreader;
import java.net.url;
import java.util.regex.matcher;
import java.util.regex.pattern;

import net.sf.json.jsonarray;
import net.sf.json.jsonexception;
import net.sf.json.jsonobject;

public class videotools
{
 public static void main(string[] args) throws exception
 {
  videotools manager = new videotools();
  string jsonurl = manager.getvideourl("http://v.youku.com/v_show/id_xmtgznda5otmy.html");
  system.out.println(jsonurl.split("#").length);
 }

 public string getvideourl(string htmlurl) throws jsonexception{
  //正则表达式解析地址，取id
  pattern p = pattern.compile(".*id_(\\w+)\\.html");
  string u = htmlurl;
  matcher m = p.matcher(u);
  string id = "";
  if (m.find()) {
   id = m.group(1);
  }
  system.out.println(id);

//  string id="xmtgznda5otmy";
  string s = getcontent("http://v.youku.com/player/getplaylist/videoids/"+id);
  jsonobject jsobj = new jsonobject();
  jsobj =jsobj.fromobject(s);
  jsonarray jsonarr = jsobj.getjsonarray("data");
  system.out.println(jsobj);
  jsonobject obj1 = jsonarr.getjsonobject(0);
  string title= obj1.getstring("title");
  double seed = obj1.getdouble("seed");
  jsonobject obj2 = obj1.getjsonobject("streamfileids");
  string mp4id = null;
  string flvid = null;
  string format = null;
  try
  {
   mp4id = obj2.getstring("mp4");
   format = "mp4";
  } catch (jsonexception e)
  {
   system.out.println("没有mp4格式");
   try
   {
    flvid = obj2.getstring("flv");
    format = "flv";
   } catch (jsonexception e1)
   {
    system.out.println("没有flv格式");
    return "";
   }
  }
  string realfileid = null;
  if (format.equals("mp4"))
  {
   realfileid = getfileid(mp4id, seed);
  } else
  {
   realfileid = getfileid(flvid, seed);
  }

  string idleft = realfileid.substring(0, 8);
  string idright = realfileid.substring(10);

  string sid = gensid();
  jsonobject obj3 = obj1.getjsonobject("segs");
  jsonarray mp4arr = obj3.getjsonarray(format);
  string videourl="";
  for (int i = 0; i < mp4arr.size(); i++)
  {
   jsonobject o = mp4arr.getjsonobject(i);
   string k = o.getstring("k");
   string url = "http://f.youku.com/player/getflvpath/sid/" + sid + "_" + string.format("%1$02x", i) + "/st/" + format
     + "/fileid/" + idleft + string.format("%1$02x", i) + idright + "?k=" + k;
   system.out.println(url);
   videourl+=url+"#";
  }
  return videourl;
 }

 private static 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();
 }

 public static string gensid()
 {
  int i1 = (int) (1000 + math.floor(math.random() * 999));
  int i2 = (int) (1000 + math.floor(math.random() * 9000));
  return system.currenttimemillis() + "" + i1 + "" + i2;
 }

 private static 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();
 }

 public static string getcontent(string strurl) {
  try {

   url url = new url(strurl);
   bufferedreader br = new bufferedreader(new inputstreamreader(
     url.openstream()));
   string s = "";
   stringbuffer sb = new stringbuffer("");
   while ((s = br.readline()) != null) {
    sb.append(s);
   }
   br.close();
   return sb.tostring();
  } catch (exception e) {
   return "error open url:" + strurl;
  }

 }
}