WeChat java generic version download Java WeChat development upload download multimedia file

The reply picture, the audio, the video message all need media_id, this is needs to upload the multimedia file to the server only.

To upload multimedia files to the server and download files from the server, you can refer to: http://mp.weixin.qq.com/wiki/index.php?title= upload and download multimedia files

The way to upload and download multimedia files is to write to Weixinutil.java.

The code is as follows:

Import Java.io.bufferedoutputstream;import Java.io.bufferedreader;import Java.io.datainputstream;import Java.io.dataoutputstream;import Java.io.file;import Java.io.fileinputstream;import Java.io.FileOutputStream; Import Java.io.ioexception;import java.io.inputstream;import Java.io.inputstreamreader;import Java.io.OutputStream ; Import Java.net.httpurlconnection;import Java.net.malformedurlexception;import Java.net.url;import Java.security.keymanagementexception;import Java.security.nosuchalgorithmexception;import Java.security.nosuchproviderexception;import Java.security.securerandom;import Java.util.Calendar;import Java.util.date;import Java.util.hashmap;import Java.util.map;import Javax.net.ssl.httpsurlconnection;import Javax.net.ssl.sslcontext;import Javax.net.ssl.sslsocketfactory;import Javax.net.ssl.trustmanager;import Net.sf.json.jsonobject;import Org.apache.commons.lang.stringutils;import Org.apache.log4j.logger;import Com.company.project.model.menu.accesstoken;import COM.COMPANY.PRoject.model.menu.menu;public class Weixinutil {private static Logger log = Logger.getlogger (weixinutil.class); public f inal static String APPID = "wxb927d4280e6db674"; Public final static String App_secret = "21441e9f3226eee81e14380a768b6d1e"; Get Access_token interface Address (get) limited to 200 (times/day) public final static String Access_token_url = "https://api.weixin.qq.com/cgi-bin/ Token?grant_type=client_credential&appid=appid&secret=appsecret "; Create menu Public final static String Create_menu_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token= Access_token "; Storage: 1.token,2: Time to get token, 3. Expiration time public final static Map
 
  
 Accesstokenmap = new HashMap 
  
   
(); /** * Initiate HTTPS request and get results * * @param requesturl Request address * @param Requestmethod request (GET, POST) * @param outputstr submitted data * @return Jsonobject (key) to get the value of the JSON object's property (jsonobject.get) */public static jsonobject HandleRequest (String requesturl,string  Requestmethod,string outputstr) {jsonobject jsonobject = null;  try {URL url = new URL (requesturl);  Httpsurlconnection conn = (httpsurlconnection) url.openconnection ();  Sslcontext CTX = sslcontext.getinstance ("SSL", "Sunjsse");  Trustmanager[] TM = {new Myx509trustmanager ()};  Ctx.init (NULL, TM, New SecureRandom ());  Sslsocketfactory SF = Ctx.getsocketfactory ();  Conn.setsslsocketfactory (SF);  Conn.setdoinput (TRUE);  Conn.setdooutput (TRUE);  Conn.setrequestmethod (Requestmethod);    Conn.setusecaches (FALSE);  if ("GET". Equalsignorecase (Requestmethod)) {conn.connect ();  } if (Stringutils.isnotempty (OUTPUTSTR)) {OutputStream out = Conn.getoutputstream ();  Out.write (Outputstr.getbytes ("Utf-8"));  Out.close (); } InputStream in = Conn.geTinputstream ();  BufferedReader br = new BufferedReader (new InputStreamReader (in, "Utf-8"));  StringBuffer buffer = new StringBuffer ();    String line = null;  while (line = Br.readline ())! = null) {buffer.append (line);  } in.close ();    Conn.disconnect (); Jsonobject = Jsonobject.fromobject (buffer.tostring ());  } catch (Malformedurlexception e) {e.printstacktrace (); Log.error ("URL Error! "); } catch (IOException e) {e.printstacktrace ();} catch (NoSuchAlgorithmException e) {e.printstacktrace ();} catch (Nosuch ProviderException e) {e.printstacktrace ()} catch (Keymanagementexception e) {e.printstacktrace ();} return Jsonobjec T }/** * Get Access_token * * @author QINCD * @date Nov 6, 9:56:43 AM */public static Accesstoken Getaccesstoken (Strin The period is returned directly//from the token that is obtained is valid for 2 hours if (!accesstokenmap.isempty ()) {Date gettokentime = (date) accesstokenmap.get ("Gettokentime ");  Calendar C = calendar.getinstance ();  C.settime (Gettokentime);    C.add (Calendar.hour_of_day, 2);  Gettokentime = C.gettime ();  if (Gettokentime.after (new Date ())) {Log.info ("The token found in the cache has not expired, get Access_token directly from the cache");  Token does not expire and gets returned directly from the cache String token = (string) accesstokenmap.get ("token");  Integer expire = (integer) accesstokenmap.get ("expire");  At.settoken (token);  At.setexpiresin (expire);  return at;  }} String Requesturl = Access_token_url.replace ("APPID", APPID). Replace ("Appsecret", Appsecret); Jsonobject object = HandleRequest (Requesturl, "GET", null); String Access_token = object.getstring ("Access_token");  int expires_in = Object.getint ("expires_in"); Log.info ("\naccess_token:" + Access_token);  Log.info ("\nexpires_in:" + expires_in); At.settoken (Access_token);  At.setexpiresin (expires_in); After each acquisition of Access_token, deposit Accesstokenmap//Next fetch, if no expiration is taken directly from Accesstokenmap. Accesstokenmap.put ("Gettokentime", New Date ()); Accesstokenmap.put ("token", Access_token); AccesStokenmap.put ("expire", expires_in); return at; }/** * Create Menu * * @author QINCD * @date Nov 6, 9:56:36 AM */public static Boolean CreateMenu (menu menu,string Access Token) {String Requesturl = create_menu_url.replace ("Access_token", Accesstoken); String menujsonstring = Jsonobject.fromobject (menu). toString (); Jsonobject jsonobject = HandleRequest (Requesturl, "POST", menujsonstring); String ErrorCode = jsonobject.getstring ("Errcode"); if (! " 0 ". Equals (ErrorCode) {log.error (" String.Format ("menu creation failed!)  Errorcode:%d,errormsg:%s ", Jsonobject.getint (" Errcode "), Jsonobject.getstring (" errmsg ")); return false; } log.info ("Menu created successfully!  "); return true; }//Upload multimedia file to server public static final String Upload_media_url = "Http://file.api.weixin.qq.com/cgi-bin/media/upload?" Access_token=access_token&type=type "; /** * Uploading multimedia files to the server
   
 * @see http://www.oschina.net/code/snippet_1029535_23824 * @see http://mp.weixin.qq.com/wiki/index.php?title= Upload and download multimedia files * * @author QINCD * @date Nov 6, 4:11:22 PM */public static jsonobject uploadmediatowx (String filepath,str ing type,string accesstoken) throws ioexception{File File = new file (FilePath), if (!file.exists ()) {log.error ("file does not exist!)  "); return null; The String URL = upload_media_url.replace ("Access_token", Accesstoken). Replace ("type", type); URL urlobj = new URL (URL); HttpURLConnection conn = (httpurlconnection) urlobj.openconnection (); Conn.setdoinput (TRUE); Conn.setdooutput (TRUE);  Conn.setusecaches (FALSE);    Conn.setrequestproperty ("Connection", "keep-alive");     Conn.setrequestproperty ("Charset", "UTF-8");    Set the boundary String boundary = "----------" + system.currenttimemillis (); Conn.setrequestproperty ("Content-type", "multipart/form-data;     boundary= "+ boundary);    Request body information//First part: StringBuilder SB = new StringBuilder (); Sb.append ("--"); // Must be more than two lines sb.append (boundary);    Sb.append ("\ r \ n");    Sb.append ("content-disposition:form-data;name=\" file\ "filename=\" "+ file.getname () +" \ "\ \ r \ n");     Sb.append ("content-type:application/octet-stream\r\n\r\n");     Byte[] head = sb.tostring (). GetBytes ("Utf-8");    Get output stream OutputStream out = new DataOutputStream (Conn.getoutputstream ());     Out.write (head);    File body part DataInputStream in = new DataInputStream (new FileInputStream (file));    int bytes = 0;    byte[] Bufferout = new byte[1024];    while ((bytes = In.read (bufferout))! =-1) {out.write (bufferout, 0, bytes);     } in.close ();     End part byte[] foot = ("\r\n--" + boundary + "--\r\n"). GetBytes ("Utf-8");//define the last data separation line out.write (foot);    Out.flush ();     Out.close (); /** * Read server response, must read, otherwise commit unsuccessful */try {//define BufferedReader input stream to read URL response stringbuffer buffer = new Stringbu     Ffer (); BufferedReader reader = new BufferedReader (New InputStreamReader (Conn.getinpuTStream ()));     String line = null;     while (line = Reader.readline ())! = null) {buffer.append (line);     } reader.close ();          Conn.disconnect ();     Return Jsonobject.fromobject (Buffer.tostring ()); } catch (Exception e) {log.error ("send POST request exception!     "+ e);     E.printstacktrace (); } return null; public static final String Download_media_url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token= ACCESS_TOKEN&MEDIA_ID=MEDIA_ID "; /** * Download multimedia files from the server * * @author QINCD * @date Nov 6, 4:32:12 PM */public static string Downloadmediafromwx (String acce Sstoken,string mediaid,string Filesavepath) throws IOException {if (Stringutils.isempty (accesstoken) | |  Stringutils.isempty (mediaid)) return null; String Requesturl = Download_media_url.replace ("Access_token", Accesstoken). Replace ("media_id", MediaID); URL url = new URL (requesturl); HttpURLConnection conn = (httpurlconnection) url.openconnection (); Conn.setrequestmethod ("GET"); Conn.setdoinpUT (TRUE); Conn.setdooutput (TRUE);  InputStream in = Conn.getinputstream (); File dir = new file (Filesavepath);  if (!dir.exists ()) {dir.mkdirs ();} if (!filesavepath.endswith ("/")) {Filesavepath + = "/";} String contentdisposition = Conn.getheaderfield ("content-disposition"); String weixinserverfilename = contentdisposition.substring (contentdisposition.indexof ("filename") +10, Contentdisposition.length ()-1);  Filesavepath + = Weixinserverfilename; Bufferedoutputstream BOS = new Bufferedoutputstream (new FileOutputStream (Filesavepath)); byte[] data = new byte[1024];  int len =-1;  while (len = in.read (data))! =-1) {bos.write (Data,0,len);} Bos.close (); In.close ();  Conn.disconnect (); return filesavepath; }}
  
 

Test code:

public class Weixinutiltest {/** * * @author QINCD * @date Nov 6, 9:57:54 AM */public static void Main (string[] Arg s) {//1). Get access_token Accesstoken Accesstoken = Weixinutil.getaccesstoken (Weixinutil.appid, WeixinUtil.APP_SECRET) ; String FilePath = "c:\\users\\qince\\pictures\\ wallpaper 20141029091612.jpg"; Jsonobject uploadjsonobj = Testuploadmedia (FilePath, "image", Accesstoken.gettoken ());  if (uploadjsonobj = = null) {System.out.println ("Upload image failed"); Return } int errcode = 0; if (Uploadjsonobj.containskey ("Errcode")) {Errcode = Uploadjsonobj.getint ("Errcode");} if (Errcode = = 0) {System.out.    println ("Image upload success");  String MediaID = uploadjsonobj.getstring ("media_id");  Long createat = Uploadjsonobj.getlong ("Created_at");  System.out.println ("--details:");  System.out.println ("media_id:" + mediaid); System.out.println ("Created_at:" + createat);} else {System.out.println ("Picture upload failed!    ");  String errmsg = uploadjsonobj.getstring ("errmsg");  System.out.println ("--details:"); SysteM.out.println ("Errcode:" + errcode);  System.out.println ("ErrMsg:" + errmsg);} String MediaID = "6w-uvsrq2hkdsdvqjjxshwtfdplfbgi1qnbnfy8wezyb9jac2xxxcauwt8p4syph"; String filepath = Testdownloadmedia (Accesstoken.gettoken (), MediaID, "d:/test"); SYSTEM.OUT.PRINTLN (filepath); /** * Upload multimedia files to * * @author QINCD * @date 6, 4:15:14 PM */public static jsonobject Testuploadmedia (String filep Ath,string type,string Accesstoken) {try {return weixinutil.uploadmediatowx (FilePath, type, accesstoken);} catch (Ioex  Ception e) {e.printstacktrace ();} return null; /** * from downloading multimedia files * * @author QINCD * @date Nov 6, 4:56:25 PM */public static string Testdownloadmedia (String access Token,string mediaid,string Filesavedir) {try {return weixinutil.downloadmediafromwx (Accesstoken, MediaId, FILESAVEDIR);  } catch (IOException e) {e.printstacktrace ();} return null; }}

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