小编Bre*_*ter的帖子

所以我从一个数据库(各种mimetypes)抓取一个blob集合,并试图将它们压缩起来,由用户通过http响应下载.我可以进行下载,但是当我尝试打开下载的zip文件时,它说"存档格式未知或已损坏".我已经尝试了以下代码与application/zip,application/octet-stream和application/x-zip-compressed,但我开始假设问题在于我如何添加文件.我也使用Java 7和Grails 2.2.4.

任何有关这方面的帮助将不胜感激.谢谢!

  final ZipOutputStream out = new ZipOutputStream(new FileOutputStream("test.zip"));


        for (Long id : ids){

            Object[] stream = inlineSamplesDataProvider.getAttachmentStream(id);


            if (stream) {

                String fileName = stream[0]
                String mimeType = (String) stream[1];
                InputStream inputStream = stream[2]
                byte[] byteStream = inputStream.getBytes();

                ZipEntry zipEntry = new ZipEntry(fileName)
                out.putNextEntry(zipEntry);
                out.write(byteStream, 0, byteStream.length);
                out.closeEntry();
            }
        }

        out.close();
        response.setHeader("Content-Disposition", "attachment; filename=\"" + "test.zip" + "\"");
        response.setHeader("Content-Type", "application/zip");
        response.outputStream << out;
        response.outputstream.flush();