Java 文件下载/预览

文件下载/预览

文件下载

//告诉浏览器不要缓存
  response.setHeader("Pragma", "no-cache");
  response.setHeader("Cache-Control", "no-cache");
  response.setIntHeader("Expires", -1);
  response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode(fileEntity.getData().getFileName(),"UTF-8"));
  response.getOutputStream().write(fileEntity.getData().getBytes());

文件预览

//告诉浏览器不要缓存
  response.setHeader("Pragma", "no-cache");
  response.setHeader("Cache-Control", "no-cache");
  response.setIntHeader("Expires", -1);
  response.setHeader("Content-disposition", "inline; filename=" + URLEncoder.encode(fileEntity.getData().getFileName(),"UTF-8"));
  response.getOutputStream().write(fileEntity.getData().getBytes());

注意点：预览只能预览图片和pdf文件，word,excel以及ppt会以下载的形式。可以考虑把word,excel以及ppt转化成pdf