使用http PUT上传的文件在服务器上的大小不正确

Question

我正尝试使用预先设置的URL将不同MIME类型的文件上传到AWS S3。我能够在S3上看到文档，但内容不恰当。它要么是0字节，要么小于我尝试的每个文件的预期大小。

下面是代码，请让我知道什么是缺少：

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

似乎结束流的检测是错误的，因此你当你看到一个空字节截断。