相关疑难解决方法(0)

我正在使用Java将文件上传到S3 - 这是我到目前为止所得到的:

AmazonS3 s3 = new AmazonS3Client(new BasicAWSCredentials("XX","YY"));

List<Bucket> buckets = s3.listBuckets();

s3.putObject(new PutObjectRequest(buckets.get(0).getName(), fileName, stream, new ObjectMetadata()));

正在上传文件,但在我未设置内容长度时会引发警告:

com.amazonaws.services.s3.AmazonS3Client putObject: No content length specified for stream > data.  Stream contents will be buffered in memory and could result in out of memory errors.

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这是我上传的文件,stream变量是一个InputStream,我可以从中得到这样的字节数组:IOUtils.toByteArray(stream).

所以,当我尝试设置内容长度和MD5(从这里取得)像这样:

// get MD5 base64 hash
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
messageDigest.update(IOUtils.toByteArray(stream));
byte[] resultByte = messageDigest.digest();
String hashtext = new String(Hex.encodeHex(resultByte));

ObjectMetadata meta = new ObjectMetadata(); …

当我使用amazon s3 SDK从Nexus 6上传文件时,它会抛出com.amazonaws.AmazonClientException:更多数据读取(4567265)比预期(4561427)异常.

但是当我从Moto G4上传图像并使用相同的代码时,它每次都会上传.

请帮我解决这个问题.

这是我的代码供参考:

 private void uploadingScreenshot(String filePath) 
    {
        File file = new File(filePath);
        if (file.exists()) {
            final String serverPath = S3Util.getMediaPath(Utility.MediaType.SCREENSHOT, false, "");
            ObjectMetadata meta = new ObjectMetadata();
            meta.setContentLength(file.length());
            S3Util.uploadMedia(SharedFolderDetailActivity.this, file, serverPath, meta, new TransferListener() {
                @Override
                public void onStateChanged(int id, TransferState state) {
                    switch (state) {
                        case COMPLETED: {
                            String path = S3Constants.BUCKET_URL + serverPath;
                            callTookScreenshotNotifierWS(path);
                        }
                        break;
                    }
                }

                @Override
                public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {

                }

                @Override
                public void …

在 S3 存储桶中不存在密钥时获取消息。我检索该存储桶中的所有对象并将这些键与给定的搜索键匹配。如果可用，则返回 URL-String，否则返回消息“指定的键不存在”。

他们在访问密钥时是否还有其他提高性能的方法，这在 S3 存储桶中不可用。

这是我的代码：

public class S3Objects {
    static Properties props = new Properties();
    static InputStream resourceAsStream;
    static {
        ClassLoader classLoader = new S3Objects().getClass().getClassLoader();
        resourceAsStream = classLoader.getResourceAsStream("aws.properties");
        try {
            props.load(resourceAsStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException, AmazonServiceException, AmazonClientException, InterruptedException {
        AWSCredentials awsCreds = new 
                        BasicAWSCredentials(props.getProperty("accessKey"), props.getProperty("secretKey"));
                        // PropertiesCredentials(resourceAsStream);
        AmazonS3 s3Client = new AmazonS3Client( awsCreds );

        String s3_BucketName = props.getProperty("bucketname");
        String folderPath_fileName = props.getProperty("path");

        //uploadObject(s3Client, s3_BucketName, folderPath_fileName);
        //downloadObject(s3Client, …