public   class  GetStatFile  extends  HttpServlet {
    String path;
    Logger logger;
     protected   void  doPost(HttpServletRequest request, HttpServletResponse response)  throws  ServletException, IOException {
       doGet(request,response);
    }

     protected   void  doGet(HttpServletRequest request, HttpServletResponse response)  throws  ServletException, IOException {
        String fileName=request.getParameter("file");
            try 
        {
          FileInputStream input=  new  FileInputStream(path+"/"+fileName);
           byte [] b = new   byte [ 1 ];
          response.setContentType("application/vnd.ms-excel");
          OutputStream out=response.getOutputStream();
           while  (input.read(b)>- 1 )
          {
              out.write(b);
          }
        }
         catch (Exception e)
        {
           response.setContentType("text/html");
           e.printStackTrace();
           PrintWriter pr =response.getWriter();
           pr.println("File not found");

        }
    }

     public   void  init()  throws  ServletException {
        path=(String)getInitParameter("filepath");
    }
}