我有一个用public access定义的s3 bucket，然而，当我上传一个文件到其中，并且访问url时，我遇到了一个拒绝访问错误：

{
    Region region = Region.EU_WEST_1;
        S3Client s3 = S3Client.builder()
                .credentialsProvider(EnvironmentVariableCredentialsProvider.create())
                .region(region)
                .build();

        String result = putS3Object(s3, "my-bucket", "pics/15/12345.jpg", "/opt/pics/15/12345.jpg");

        System.out.println(result);

    }

    // snippet-start:[s3.java2.s3_object_upload.main]
    public static String putS3Object(S3Client s3,
            String bucketName,
            String objectKey,
            String objectPath) {

        try {
            PutObjectResponse response = s3.putObject(PutObjectRequest.builder()
                            .bucket(bucketName)
                            .key(objectKey)
                            .build(),
                    RequestBody.fromBytes(getObjectFile(objectPath)));

            return response.eTag();

        } catch (S3Exception e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return "";
    }

    // Return a byte array
    private static byte[] getObjectFile(String filePath) {

        FileInputStream fileInputStream = null;
        byte[] bytesArray = null;

        try {
            File file = new File(filePath);
            bytesArray = new byte[(int) file.length()];
            fileInputStream = new FileInputStream(file);
            fileInputStream.read(bytesArray);

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fileInputStream != null) {
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return bytesArray;
    }

这是我在桶里看到的信息：

Objects are the fundamental entities that are stored in Amazon S3. In order for other people to gain access to objects, you will have to explicitly grant them permissions.

我还尝试了api的v2