@RequestMapping("/attachImage.do")
public void attachImage(RMap rmap, ModelMap model, HttpServletRequest request, HttpServletResponse response) throws IOException {		
	UMap umap = fileService.selectAttachFile(rmap, model);
	byte[] imageData = (byte[]) umap.get("file");
	response.setContentType("image/jpeg");
	response.getOutputStream().write(imageData);
}