InputStream bis = null;		BufferedOutputStream bos = null;				try {			response.setContentType("UTF-8");			response.setCharacterEncoding("UTF-8");			//			if (uploadFile.getExtend().equals("text")) {//				response.setContentType("text/plain;");//			} else if (uploadFile.getExtend().equals("doc")) {//				response.setContentType("application/msword;");//			} else if (uploadFile.getExtend().equals("xls")) {//				response.setContentType("application/ms-excel;");//			} else if (uploadFile.getExtend().equals("pdf")) {//				response.setContentType("application/pdf;");//			} else if (uploadFile.getExtend().equals("jpg") || uploadFile.getExtend().equals("jpeg")) {//				response.setContentType("image/jpeg;");//			} else {//				response.setContentType("application/x-msdownload;");//			}			response.setContentType("text/plain;");						response.setHeader("Content-disposition", "attachment; filename=menu.json");			response.setHeader("Content-Length", ""+(new File(fileName)).length());						bos = new BufferedOutputStream(response.getOutputStream());			bis = new BufferedInputStream(new FileInputStream(fileName));			byte[] buff = new byte[2048];			int bytesRead;			while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {				bos.write(buff, 0, bytesRead);			}					} catch (UnsupportedEncodingException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}finally{			try {				if (bis != null) {					bis.close();				}				if (bos != null) {					bos.close();				}			} catch (IOException e) {				e.printStackTrace();			}		}