BufferedOutputStream binout= new  BufferedOutputStream(response.getOutputStream());  
    ps = conn.prepareStatement("select pict from tr_scandoc where id=? and nnak=? and side=? and typedoc=?"); 
    ps.setInt( 1 , id);
    ps.setInt( 2 , nnak);
    ps.setInt( 3 , side);
    ps.setInt( 4 , tDoc);
    rs = ps.executeQuery();
     while  ( rs.next()) {
       Blob blob = rs.getBlob("pict");
       InputStream is = blob.getBinaryStream();
        int  bufSize = ((oracle.sql.BLOB) blob).getBufferSize();
        byte  buffer[] =  new   byte [bufSize];
        int   length;
        while  ((length = is.read(buffer,  0 , bufSize)) != - 1 ) {
         binout.write(buffer,  0 , length);
       }  

       is.close();
  
}