使用 aws- Java -sdk-s3 怎么 aws s3 上断点下载文件，那里有比较好的例子吗？

[fragrans23]

下载文件原先使用下面的代码：

S3Object object = s3.getObject(bucketName, fileKey);
        S3ObjectInputStream objectContent = object.getObjectContent();
        OutputStream out =null;
        try {
            response.setCharacterEncoding("utf-8");
            response.setContentType("multipart/form-data");
            response.setHeader("Content-Disposition",
                    "attachment;fileName=" + FileUtils.setFileDownloadHeader(request, downloadName));
            out = response.getOutputStream();
            byte[] buf = new byte[1024];
            int len;
            while ((len = objectContent.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            response.flushBuffer();

s3 内有这么一个方法可以获取文件某一断数据：

etObjectRequest rangeRequest = new GetObjectRequest(bucketName, fileKey)
                .withRange(start, end);
        S3Object object = s3.getObject(rangeRequest);
        S3ObjectInputStream objectContent = object.getObjectContent();

如果下载了某段数据，怎么整合起来形成一个完整文件？ 思路应该是下载各个分片合并，或在某个临时文件后面追加内容？哪里有比较完整的代码吗？希望各位朋友能够帮忙解答

[lmshl]

https://docs.oracle.com/javase/7/docs/api/java/nio/channels/SeekableByteChannel.html

SeekableByteChannel position(long newPosition)
// Sets this channel's position.