SPRINGMVC with Ajaxfileupload asynchronous multi-file upload to remote server

<input type= "File" id= "playeraddress" name= "playeraddress"/><input type= "file" id= "cover" name= "Cover"/> Here is the two file ID defined by itself

$.ajaxfileupload ({url:web_path+ ' upload/upload.do ', Secureuri:false, data:data,//the data JSON format to be passed Fileelem    Entid: [' playeraddress ', ' cover '], DataType: ' json ', ' success:function ' (data) {////////////post-upload callback. }, Error:function (data) {}});

/**     *     *      * @ param request     *  @param  response     *   @param  audioItem     *  @return      */      @RequestMapping (value =  "/upload.do", method = {  requestmethod.post })      @ResponseBody     public string  addmusic (httpservletrequest request,             httpservletresponse response, audioitem audioitem)  {         //There's no need to bother, it's just         string uploadfileurl  = globalutil .getvalue ("Upload_audioitem_audio_url");         string uploadiconurl =&nbsp Globalutil.getvalue ("Upload_audioitem_pic_url");         Commonsmultipartresolver resolver = new commonsmultipartresolver (                 request.getservletcontext ());         if  (Resolver.ismultipart (request))  {             multiparthttpservletrequest multirequest =   (multiparthttpservletrequest)  request;             //  get all the file names in the request              Iterator<string> iter = multirequest.getfilenames ();             while  (Iter.hasnext ())  {             &nbSp;   string filename = iter.next ();                 //  get uploaded files                  multipartfile file = multirequest.getfile (fileName);                 /**                  *  Get file name                  */                 String  Originalfilename = file.getoriginalfilename ();                                  if  ("Playeraddress". Equals (FileName) &&! "". Equals (originalfilename))  {                     try {                         //here the upload method is to use the HTTP  post the way to upload files   post them later                          String url =  Baseservice.upload (uploadfileurl,                                  file.getoriginalfilename (),                                  file.getinputstream ());                     } catch  (Ioexception e)  {                         // TODO Auto-generated catch block                          e.printstacktrace ();                     }                 }                 if  ("Cover". Equals (FileName) &&! "". Equals (OriginalFilename)) {&NBSP;&NBSP;&NBSP;&NBSP;&Nbsp;               try {                          string icon = baseservice.upload (uploadIconUrl,                                  file.getoriginalfilename (),                                  file.getinputstream ());                     }  catch  (ioexception e)  {                &Nbsp;        // todo auto-generated catch block                          e.printstacktrace ();                     }                 }             }            //need attention here   Using ajaxfileupload requires that you return results using the following methods   success  methods              response.setcontenttype ("text/html");               try {                 Response.getwriter (). Write ("OK");             }  catch  (ioexception e)  {                 e.printstacktrace ();             }        }         return null;    }

The last step is      public static string upload (string httpurl,  String filename, inputstream inputstream)  {         String result =  "";        try {             //here to see your network environment   set proxy on Demand    normal no need to ignore              if  (True)  {                 system.setproperty (" Http.proxyhost ",  baseservice.proxy_ip);                 system.setproperty ("Http.proxyport",  baseservice.proxy_port);             }             string boundary =  "---------7d4a6d158c9"; //  define data dividers              url url = new url (Httpurl);             HttpURLConnection conn =  (httpurlconnection)   Url.openconnection ();            //  The Send POST request must have the following two lines set             conn.setdooutput (True) ;             conn.setdoinput (True);             conn.setusecaches (False);             conn.setrequestmethod ("POST");             conn.setrequestproperty ("Connection",  "keep-alive");         &Nbsp;   conn.setrequestproperty ("User-agent",                      "mozilla/4.0  (compatible;  MSIE 6.0; WINDOWS NT 5.1; SV1) ");             conn.setrequestproperty ("Charsert",  "UTF-8");             conn.setrequestproperty ("Content-type",                      "Multipart/form-data ;  boundary= " + boundary);             outputstream out = new dataoutputstream (Conn.getoutputstream ());             byte[] end_data =  ("\r\n--"  +  boundary +  "--\r\n"). GetBytes ();//  define the final data divider line              Stringbuilder sb = new stringbuilder ();             sb.append ("---");             sb.append (boundary);             sb.append ("\ r\n ");             sb.append (" Content-Disposition:  form-data;name=\ "File"  + 1                     +  "\"; filename=\ ""  + filename +   "\" \ \ \ \ \ \ "            sb.append (" content-type:application/octet-stream\r\n\r\n ");             byte[] data = sb.tosTring (). GetBytes ();             out.write (data);             DataInputStream in =  New datainputstream (InputStream);             Int bytes = 0;            byte[]  bufferOut = new byte[1024];             while  ((Bytes = in.read (bufferout))  != -1)  {                 out.write (bufferOut, 0,  bytes);            }             out.write ("\ r \ n". GetBytes ()); //  multiple files, add this   between two files     &nbSp;      in.close ();             out.write (End_data);             Out.flush ();             out.close ();             //  define BufferedReader input stream to read the response of the URL              BufferedReader reader = new  BufferedReader (New inputstreamreader (                     conn.getinputstream ()));             String line = null;             while  ((Line = reader.readline ())  != null)  {                result+=line;             }        } catch   (exception e)  {             SYSTEM.OUT.PRINTLN ("Send POST request exception!") " + e);        }             return new jsonobject (Result). getString ("url");     }//  It's over! I hope I can help you.

SPRINGMVC with Ajaxfileupload asynchronous multi-file upload to remote server