文件下载

/**
	 * 下载文件
	 * 
	 * @param basePath
	 * @throws IOException
	 */
	private void downLoadFile(String basePath) throws IOException {
		HttpServletResponse response = ServletActionContext.getResponse();
		File zipFile = new File(basePath + ".zip");
		try {
			// 以流的形式下载文件。
			InputStream fis = new BufferedInputStream(new FileInputStream(
					zipFile.getPath()));
			byte[] buffer = new byte[fis.available()];
			fis.read(buffer);
			fis.close();
			// 清空response
			response.reset();
			// 设置response的Header
			response.addHeader("Content-Disposition", "attachment;filename="
					+ new String(zipFile.getName().getBytes("utf-8")));
			response.addHeader("Content-Length", "" + zipFile.length());
			OutputStream toClient = new BufferedOutputStream(
					response.getOutputStream());
			response.setContentType("application/octet-stream");
			toClient.write(buffer);
			toClient.flush();
			toClient.close();
		} catch (Exception e) {
			PrintWriter out = response.getWriter();
			out.print("<script>alert('down file err');</script>");
			out.close();
		}
	}