File Dialog Box

Question

Hi
I am using struts framework for my web application, and i am working on reports section,
i want File Dialog box like open,save when i click generate report button , so user can save generated report in his local system.how can we do this..currently i am able to generae the data bygiving the local file path.(String filename = "c:\\csv\\billreport.csv"; FileWriter fw = new FileWriter(filename);)
my action will call my dao mthod that it will get the qry data.so when i click generate report button i am calling java script mthod its calling my action.
so how can we get the File dialog box when i click buton.i have to write some code in my java script method?
plz help me.

Answer 1

Just let the link point to some servlet which takes the file identifier as request parameter or pathinfo, then gets an InputStream of the file contents somehow, then writes it to the OutputStream of the response. That's basically all. If you want a 'Save As' dialogue all the time, then you need to set content-disposition header to "attachment" as well. Else you're dependent on the browser default configuration.
You can find here a (basic) example to get the idea [http://balusc.blogspot.com/2007/07/fileservlet.html].