怎么在hdfs上下载文件传给前端

Question

我现在想从hdfs上获取文件直接将获取到的文件返回给前端，请问要怎么实现？ 文件不能存放到本地路径
java环境

Answer 1

String fileName = "xxx";
response.reset();
        response.setContentType("application/x-msdownload");
        try {
            response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes(), "ISO-8859-1"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        try (
                BufferedInputStream bis = new BufferedInputStream("xxx");
                // 输出流
                BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream())
        ) {
            byte[] buff = new byte[1024];
            int len = 0;
            while ((len = bis.read(buff)) > 0) {
                bos.write(buff, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }