Generate multiple files and package them in a zipped package and download them on the Web page.

Web page:

<href= "${ctx}/tactivity/redpacketdetailszip?activityid=${activityid}"  Target= "_blank"> export yesterday OpenID</a>

Java code:

    /*** Export zip file. A TXT file is in the zip. TXT file is a 500 OpenID.     OpenID a line. * @authorXuyong * @date 2014-09-26*/@RequestMapping (Value= "/redpacketdetailszip")     PublicString Redpacketdetailszip (modelmap model, ttakepartquery query, httpservletrequest request, Ht Tpservletresponse response)throwsException {logger.info ("Redpacketdetailszip Red envelopes export Zip file start ..."); //query criteria Activity ID is Activityid,and 10,000 not sent record for participation time less than dateutil.getcurrentdate (DATEUTIL.DATE_FMT)String activityidstr = Request.getparameter ("ActivityID");//Activity IDTactivity tactivity =Tactivitymanager.getbyid (long.valueof (ACTIVITYIDSTR)); Long ActivityID=NewLong (ACTIVITYIDSTR); Query.setsendtimezip (Dateutil.getcurrentdate (DATEUTIL.DATE_FMT)); //month and day, time is less than the participation of this timeQuery.setactivityid (ActivityID);//EventsQuery.setsortcolumns ("T.createtime desc");//SortQuery.setpagesize (10000);//article numberPage page =ttakepartmanager.findpage (query); Logger.info ("Generate File File ...."); String Zipfilename= This. SaveFile (Request, Tactivity.getshopid (), Page.getresult ()); Logger.info ("Generate file ...."); OutputStream o=Response.getoutputstream (); byteB[] =New byte[1024]; File Fileload=NewFile (zipfilename); Response.setheader ("Content-disposition", "attachment;filename=" + Urlencoder.encode (Fileload.getname (), "Utf-8")); Response.setcontenttype ("Application/zip");//set the MIME type. Response.setheader ("Content_length", String.valueof (Fileload.length ()));//get the file length.FileInputStream in =NewFileInputStream (Fileload);//Download the file.         intn = 0;  while((n = in.read (b))! =-1) {O.write (b,0, N); } logger.info ("Redpacketdetailszip Red envelopes export Zip file end."); return NULL; }

/**Save the file and claim to compress the package, return the package address * * @date Nov, 20142:06:25 PM *@paramResultlist *@returnZip Package Address *@throwsIOException*/    PrivateString SaveFile (httpservletrequest request, Long Shopid, List resultlist)throwsioexception{Logger.info ("Generate File Start ..."); String Zippath= Dateutil.getcurrentdatestr (DATEUTIL.DATE_FMT) +resultlist.size () + "OpenID compression pack. zip";//Upload file path        intPageSize = 3;//each file storage sizeString txtfullpath = "file name"; StringBuffer Openidbuffer=NewStringBuffer (100);//OpenID ContentList<file> allfileslist =NewArraylist<file> ();//File Collection//Save the export file. Maximum of 20 txtLogger.info ("Generate file TXT file start ...");  for(intI=0;i<resultlist.size (); i++) {Ttakepart Ttakepart=(Ttakepart) resultlist.get (i); if(I%pagesize==0 && i>0) {Txtfullpath= Fileutil.getfilepath (Request, Constant.carddown_path, Shopid, i+ ". txt"); Logger.info ("Generate file TXT file txtfullpath=" +Txtfullpath); //Create a Save filefileutil.saveonefile (Txtfullpath, openidbuffer.tostring ()); Allfileslist.add (NewFile (Txtfullpath)); //Reset ContentOpenidbuffer =NewStringBuffer (100); } openidbuffer.append (Ttakepart.getwxno ()). Append ("\ n");//OpenID Content        }        if(Openidbuffer.length () > 0) {//the remaining contents of the file exist, save the fileTxtfullpath = Fileutil.getfilepath (Request, Constant.carddown_path, Shopid, "Last.txt"); Logger.info ("Generate file TXT file txtfullpath=" +Txtfullpath); //Create a Save filefileutil.saveonefile (Txtfullpath, openidbuffer.tostring ()); Allfileslist.add (NewFile (Txtfullpath)); //Reset ContentOpenidbuffer =NewStringBuffer (100); } logger.info ("Generate file TXT file end ..."); Logger.info ("Compress txt file start ..."); //Delete an existing fileFile ZipFile =NewFile (Zippath); if(Zipfile.exists ()) {zipfile.delete (); } Zippath=Fileutil.getfilepath (Request, Constant.carddown_path, Shopid, Zippath); //Compress file Packaging        byte[] buffer =New byte[1024]; Zipoutputstream out=NewZipoutputstream (NewFileOutputStream (Zippath)); //encapsulate your list with the appropriate business. FileInputStream FIS =NULL;  for(File eachfile:allfileslist) {FIS=NewFileInputStream (Eachfile); Out.putnextentry (NewZipEntry (Eachfile.getname ())); intLen;  while(len = fis.read (buffer)) > 0) {out.write (buffer,0, Len);            } out.closeentry ();            Fis.close (); Logger.info ("Delete file txt file txtfullpath=" +Eachfile.getcanonicalpath ());        Eachfile.delete ();        } out.close (); Logger.info ("Compress txt file end."); Logger.info ("Generate file End....zippath=" +Zippath); returnZippath; }

/**Save File ** @date, 20144:27:49 PM *@paramTxtfullpath File Full path *@paramfilecontent File Contents *@throwsIOException*/     Public Static voidSaveonefile (String FullPath, String filecontent)throwsIOException {File file=NewFile (FullPath); //Create a file        if(!file.exists ()) {            if(!File.getparentfile (). exists ()) {File.getparentfile (). Mkdirs ();//Create a directory} file.createnewfile (); }        //Save FileBufferedoutputstream Bufferedoutputstream =NewBufferedoutputstream (Newfileoutputstream (file));         Bufferedoutputstream.write (Filecontent.tostring (). GetBytes ()); Bufferedoutputstream.close ();//Write Content}

Generate multiple files and package them in a zipped package and download them on the Web page.