使用AmazonS3Client在S3上上傳文件java

Question

我正在使用第三方服務器，它會返回以下內容。 1）網址 2）ACL 3）政策 4）awsAccesskeyID 5）簽名 6）鍵 我可以使用下面的代碼

final File localFile = new File(localFilePath); 

final Part[] parts = { new StringPart("acl", acl), 
    new StringPart("policy", policy), 
    new StringPart("AWSAccessKeyId", awsAccessKeyId), 
    new StringPart("signature", signature), 
    new StringPart("key", key, HTTP.UTF_8), 
    new FilePart("file", localFile) }; 

    final MultipartRequestEntity mpRequestEntity = new MultipartRequestEntity(parts, filePost.getParams()); 

    filePost.setRequestEntity(mpRequestEntity); 
    final HttpClient client = new HttpClient(); 
    try 
    { 

     status = client.executeMethod(filePost); 
    } 

上傳文件，但現在我想用AmazonS3Client使用下面的代碼，但其拋出異常

10-31 16：21：36.070：INFO/com.amazonaws.request（13882）：接收到錯誤響應 ：狀態代碼：403，AWS請求ID：51F7CB27E58F88FD，AWS 錯誤代碼：SignatureDoesNotMatch，AWS錯誤消息：請求 我們計算的簽名與您提供的簽名不匹配。 檢查你的密鑰和簽名方法，S3擴展請求ID： YwNNsWOXg71vXY1VS0apHnHpHp4YVWRJ63xm8C7w36SYg1MNuIykw75YhQco5Lk7

 final AmazonS3Client s3Client = new AmazonS3Client(new BasicAWSCredentials(awsAccessKeyId, key)); 


     // Create a list of UploadPartResponse objects. You get one of these 
     // for each part upload. 
     final List<PartETag> partETags = new ArrayList<PartETag>(); 

     // Step 1: Initialize. 
     final InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(targetURL, key); 
     final InitiateMultipartUploadResult initResponse = s3Client.initiateMultipartUpload(initRequest); 

     final File file = new File(localFilePath); 
     final long contentLength = file.length(); 
     long partSize = 5242880; // Set part size to 5 MB. 

     try 
     { 
      // Step 2: Upload parts. 
      long filePosition = 0; 
      for (int i = 1; filePosition < contentLength; i++) 
      { 
       // Last part can be less than 5 MB. Adjust part size. 
       partSize = Math.min(partSize, (contentLength - filePosition)); 

       // Create request to upload a part. 
       final UploadPartRequest uploadRequest = new UploadPartRequest().withBucketName(targetURL).withKey(key) 
         .withUploadId(initResponse.getUploadId()).withPartNumber(i).withFileOffset(filePosition) 
         .withFile(file).withPartSize(partSize); 

       // Upload part and add response to our list. 
       partETags.add(s3Client.uploadPart(uploadRequest).getPartETag()); 

       filePosition += partSize; 
      } 

      // Step 3: complete. 
      final CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(targetURL, key, 
        initResponse.getUploadId(), partETags); 

      s3Client.completeMultipartUpload(compRequest); 
     } 
     catch (final Exception e) 
     { 
      s3Client.abortMultipartUpload(new AbortMultipartUploadRequest(targetURL, key, initResponse.getUploadId())); 
      return false; 
     } 
     return true; 

我失去了一些東西在這裏？

Answer 1

我發現服務器一次性發送簽名上傳文件。在需要多上傳多個簽名，並且將在各個步驟所需的情況下.. 有沒有辦法上傳在多個部分文件，直到服務器共享的密鑰:(。

http://dextercoder.blogspot.in/2012/02/multipart-upload-to-amazon-s3-in-three.html