使用TransferManager上传大量小对象

// 示例代码：使用 TransferManager 上传大量小对象
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.amazonaws.services.s3.transfer.Upload;

public class S3Uploader {
    public static void main(String[] args) {
        AmazonS3 s3Client = AmazonS3ClientBuilder.defaultClient();
        TransferManager transferManager = new TransferManager(s3Client);

        for (int i = 0; i < 1000; i++) {
            String keyName = "small-object-" + i;
            String filePath = "/path/to/local/file-" + i;
            Upload upload = transferManager.upload("my-bucket", keyName, new File(filePath));
            upload.addProgressListener(new ProgressListener() {
                @Override
                public void progressChanged(ProgressEvent progressEvent) {
                    System.out.println("Upload progress: " + progressEvent.getBytesTransferred());
                }
            });
        }

        transferManager.shutdownNow();
    }
}