使用http PUT上传的文件在服务器上的大小不正确

Question

I am trying to upload files of different MIME types to AWS S3 using the presigned URL. I am able to see the document on S3 but the content is inappropriate. It is either 0 bytes or less than the expected size for every file that I am trying.

Here is the code, please let me know what is missing:

public static void main(String[] args) {

    URLConnection urlconnection = null;

    try {
        File file = new File(File_Path);

        if (isEncoded == "false") {
            URL obj = new URL(Upload_Url);
            urlconnection = obj.openConnection();
        } else {
            try {
                URI uri = new URI(Upload_Url);
                URL url = uri.toURL();
                urlconnection = url.openConnection();
            } catch (URISyntaxException e) {
                e.printStackTrace();
            }
        }
        urlconnection.setDoOutput(true);
        urlconnection.setDoInput(true);

        if (urlconnection instanceof HttpURLConnection) {
            ((HttpURLConnection) urlconnection).setRequestMethod("PUT");
            ((HttpURLConnection) urlconnection).setRequestProperty("Content-Type", Content_Type);
            ((HttpURLConnection) urlconnection).connect();
        }

        BufferedOutputStream bos = new BufferedOutputStream(urlconnection.getOutputStream());
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

        int i;
        // read byte by byte until end of stream
        while ((i = bis.read()) > 0) {
            bos.write(i);
        }
        bis.close();
        bos.close();

    } catch (Exception e) {
        e.printStackTrace();
    }

Answer 1

似乎您的流末检测是错误的，因此当您看到空字节时，您将被截断。