java - Progress bar for File Uploading? -

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i using servlets upload files in web application. want show progress bar while uploading. have went through ajax+progresslistener examples, 1 here.

in dopost() method creates session object , sets new attribute listener. apart previous code , tutorials code dopost() method same.

my question setting listener attribute 1 time, @ beginning. how update bytesread frequently(i new this, so, questions maybe unreasonable)

in doget() method retrieve listener attribute , extracts needed information it.

this part also, not able understand. not implementing progresslistener class(searches, led me class).

i know dwr. so, can use data transfer information server, if understood server side process update data transfer.

shall 1 explain me server side process?

or links or suggestions appreciative @ moment!!!

thanks!

similar thread, file upload java progress bar.


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