java - how to monitor progress of uploading file in servlet 3.1 -

i want monitor progress of file getting uploaded m using servlet 3.1

i know specs of servlet 3.1 , don't need apache common fileupload can part class

i did this

inputstream inputstream = null;          double s;        string size=null;        string contenttype=null;        string submittedname=null;        string tim=null;        string actuallocation=null;        system.out.println("getting here");        part filepart = request.getpart("file");        system.out.println("getting here");        if(description.equals(""))        {            system.out.println("please provide description file");        }        else{              if (filepart != null )               {                     s=(double)filepart.getsize();                      double mb=(s/1048576);                    if(mb != 0)                         {                              size=string.valueof((float)mb);                               contenttype=filepart.getcontenttype();                               submittedname=getformatted(filepart.getsubmittedfilename());                               tim=string.valueof(system.currenttimemillis());                               actuallocation=name+"-"+commun+"-"+tim+"-"+submittedname;                               system.out.println("getting there");                              inputstream = filepart.getinputstream();                               system.out.println("getting here & there");                                   try                                  {                                      file file=new file(x,actuallocation);                                      files.copy(inputstream, file.topath());                                   } 

i know can use listener monitor progress , but main question should set progress listener thought should set part filepart.before system.out.println("getting here")

this screenshot of project

u can see chrome displaying progress of uploading (in bottom)(but want more impressive progress bar)

when ran project thought in console i'll see "getting here " while uploading found control not coming part unless uploading completed.

i'm bit confuse @ segment uploading happening , should set progress listener

you don't need in server side upload progress bar. can using javascript, html , css.

if using jquery take @ pugin http://malsup.com/jquery/form/. here file upload progress bar demo link http://malsup.com/jquery/form/progress.html. there 2 more demos , plenty more examples in website.

and can take @ tutorial http://codular.com/javascript-ajax-file-upload-with-progress doing html5 , javascript. ignore php part.

you should not have change in java code, cause servlet method hit after file upload has been completed.