OSS无法下载到本地？为什么

程序没有写文件到C:\Test权限，试试把Test的文件属性-〉安全里访问权限改改。

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楼主那个是分块下载大文件的代码？没有试过上述代码。一般对于下载来说，只需要提供一个URL即可，如果要分块的话，现在的下载工具都会分块下载。你可以先试试下载一个小文件看是否OK。
   参考代码：

public void downloadNet(HttpServletResponse response) throws MalformedURLException {
        // 下载网络文件
        int bytesum = 0;
        int byteread = 0;

        URL url = new URL("http://aliyunbbs.oss.aliyuncs.com/attachment/upload/middle/84/1480587189050384.png");

        try {
            URLConnection conn = url.openConnection();
            InputStream inStream = conn.getInputStream();
            FileOutputStream fs = new FileOutputStream("c:/abc.png");

            byte[] buffer = new byte[1204];
            int length;
            while ((byteread = inStream.read(buffer)) != -1) {
                bytesum += byteread;
                System.out.println(bytesum);
                fs.write(buffer, 0, byteread);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

有代码分享一下么 这个看不出原因的

各位   这是什么原因啊？是没有权限访问C:\test吗？

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    public static void main(String[] args) throws IOException,
            InterruptedException {
        final String localFilePath = "C:\\test";
        final String bucketName = "user-1";
        final String fileKey = "public-bg9";

        ObjectMetadata objectMetadata = client.getObjectMetadata(bucketName,
                fileKey);
        long partSize = 1024 * 1024 * 5;
        long fileLength = objectMetadata.getContentLength();
        //随机流可以读也可以写，rw代表“可读写”
        RandomAccessFile file = new RandomAccessFile(localFilePath, "rw");
        file.setLength(fileLength);
        file.close();

        int partCount = calPartCount(fileLength, partSize);
        System.out.println("需要下载的文件分块数：" + partCount);
        executorService = Executors.newFixedThreadPool(5);
        List<String> eTags = Collections
                .synchronizedList(new ArrayList<String>());

        for (int i = 0; i < partCount; i++) {
            final long startPos = partSize * i;
            final long endPos = partSize
                    * i
                    + (partSize < (fileLength - startPos) ? partSize
                            : (fileLength - startPos)) - 1;

            executorService.execute(new BlockDownloadThread(startPos, endPos,
                    localFilePath, bucketName, fileKey, eTags));
        }
        executorService.shutdown();
        while (!executorService.isTerminated()) {
            executorService.awaitTermination(5, TimeUnit.SECONDS);
        }

        if (eTags.size() != partCount) {
            throw new IllegalStateException("下载失败，有Part未下载成功。");
        }
    }

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权限应该没问题吧   你看看