java获取百度网盘真实下载链接的方法

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.RandomAccessFile;import java.lang.reflect.Method;import java.net.HttpURLConnection;import java.net.URL;public class HttpRequest { public static String getData(String u) throws Exception {  String re="";    URL url = new URL(u);  HttpURLConnection httpURLConnection = (HttpURLConnection) url    .openConnection();  httpURLConnection.setRequestMethod("GET");  httpURLConnection.setDoInput(true);  httpURLConnection.setDoOutput(true);  InputStream is = httpURLConnection.getInputStream();  InputStreamReader isr = new InputStreamReader(is);  BufferedReader bufferedReader = new BufferedReader(isr);  String iL = "";  while ((iL = bufferedReader.readLine()) != null) {   re += iL + "/n";  }  return re; }}

import java.net.URLEncoder;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.json.JSONArray;import org.json.JSONObject;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;public class BaiduNetDisk { public static List<Map<String, Object>> getUrl(String url) throws Exception {  List<String> fs_id = new ArrayList<String>();  List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  Document doc = Jsoup.connect(url).get();  String html = doc.toString();  int a = html.indexOf("{/"typicalPath");  int b = html.indexOf("yunData.getCon");  int sign_head = html.indexOf("yunData.SIGN = /"");  int sign_foot = html.indexOf("yunData.TIMESTAMP");  int time_head = html.indexOf("yunData.TIMESTAMP = /"");  int time_foot = html.indexOf("yunData.SHARE_UK");  int share_id_head = html.indexOf("yunData.SHARE_ID = /"");  int share_id_foot = html.indexOf("yunData.SIGN ");  String sign = html.substring(sign_head, sign_foot);  sign = sign.substring(sign.indexOf("/"") + 1, sign.indexOf("/";"));  String time = html.substring(time_head, time_foot);  time = time.substring(time.indexOf("/"") + 1, time.indexOf("/";"));  String share_id = html.substring(share_id_head, share_id_foot);  share_id = share_id.substring(share_id.indexOf("/"") + 1,    share_id.indexOf("/";"));  System.out.println(share_id);  html = html.substring(a, b);  a = html.indexOf("{/"typicalPath");  b = html.indexOf("};");  JSONArray jsonArray = new JSONArray("[" + html.substring(a, b + 1)    + "]");  JSONObject jsonObject = jsonArray.getJSONObject(0);  String uk = jsonObject.getString("uk");  String shareid = jsonObject.getString("shareid");  String path = URLEncoder.encode(jsonObject.getString("typicalPath"),    "utf-8");  jsonArray = new JSONArray("[" + jsonObject.getString("file_list") + "]");  jsonObject = jsonArray.getJSONObject(0);  jsonArray = new JSONArray(jsonObject.getString("list"));  jsonObject = jsonArray.getJSONObject(0);  String app_id = jsonObject.getString("app_id");  if (jsonObject.getString("isdir").equals("1")) {   String url1 = "http://pan.baidu.com/share/list?uk="     + uk     + "&shareid="     + shareid     + "&page=1&num=100&dir="     + path     + "&order=time&desc=1&_="     + time     + "&bdstoken=c51077ce0e0e313a16066612a13fbcd4&channel=chunlei&clienttype=0&web=1&app_id="     + app_id;   String fileListJson = HttpRequest.getData(url1);   System.out.println(fileListJson);   jsonArray = new JSONArray("[" + fileListJson + "]");   jsonObject = jsonArray.getJSONObject(0);   jsonArray = new JSONArray(jsonObject.getString("list"));  }  final int size = jsonArray.length();  for (int i = 0; i < size; i++) {   Map<String, Object> map = new HashMap<String, Object>();   jsonObject = jsonArray.getJSONObject(i);   String fileName = jsonObject.getString("server_filename");   map.put("fileName", fileName);   fs_id.add(jsonObject.getString("fs_id"));   String fileInfo = HttpRequest     .getData("http://pan.baidu.com/api/sharedownload?sign="       + sign       + "×tamp="       + time       + "&bdstoken=c51077ce0e0e313a16066612a13fbcd4&channel=chunlei&clienttype=0&web=1&app_id=250528&encrypt=0&product=share&uk="       + uk + "&primaryid=" + share_id + "&fid_list=%5B"       + fs_id.get(i) + "%5D");   JSONArray jsonArray2 = new JSONArray("[" + fileInfo + "]");   JSONObject json_data = jsonArray2.getJSONObject(0);   if (json_data.getString("errno").equals("0")) {    jsonArray2 = new JSONArray(json_data.getString("list"));    json_data = jsonArray2.getJSONObject(0);    map.put("url", json_data.getString("dlink"));   } else if (json_data.getString("errno").equals("-20")) {    return null;    // String getVerCode();   } else {    return null;   }   list.add(map);  }  return list; }}