/**	 * 下载方法	 * @param request	 * @param response	 * @param storeName 文件在存在位置的名字(需要带着后缀)	 * @param contentType 下载文件的类型(如果文件类型比较多直接用"multipart/form-data"会自己判断文件类型)	 * @param realName 用户下载文件的名称	 * @throws Exception	 */	public void download(HttpServletRequest request,			HttpServletResponse response, String storeName, String contentType,			String realName) throws Exception {		response.setContentType("text/html;charset=UTF-8");		request.setCharacterEncoding("UTF-8");		BufferedInputStream bis = null;		BufferedOutputStream bos = null;                //fileUploadPath文件的路径                //UpFileRoute.itemFile是保存的目录名称		String ctxPath = fileUploadPath+				"\\"+UpFileRoute.itemFile+"\\";		String downLoadPath = ctxPath + storeName;		long fileLength = new File(downLoadPath).length();		response.setContentType(contentType);		response.setHeader("Content-disposition", "attachment; filename="				+ new String(realName.getBytes("utf-8"), "ISO8859-1"));		response.setHeader("Content-Length", String.valueOf(fileLength));		bis = new BufferedInputStream(new FileInputStream(downLoadPath));		bos = new BufferedOutputStream(response.getOutputStream());		byte[] buff = new byte[2048];		int bytesRead;		while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {			bos.write(buff, 0, bytesRead);		}		bis.close();		bos.close();	}