minio分片上传代码

以下是使用Java SDK实现MinIO分片上传的示例代码：

import io.minio.MinioClient;
import io.minio.errors.InvalidResponseException;
import io.minio.errors.MinioException;
import io.minio.errors.XmlParserException;
import io.minio.messages.CompleteMultipartUpload;
import io.minio.messages.Part;
import io.minio.messages.Upload;
import java.io.IOException;
import java.io.InputStream;
import java.security.NoSuchAlgorithmException;
import java.util.LinkedList;
import java.util.List;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class MinioMultipartUploadExample {

  public static void main(String[] args)
      throws IOException, InvalidResponseException, NoSuchAlgorithmException, XmlParserException,
      MinioException {
    String bucketName = "my-bucket";
    String objectName = "my-object";
    String fileName = "/path/to/my/file";
    int partSize = 5 * 1024 * 1024; // 5 MB
    String endpoint = "https://play.min.io";
    String accessKey = "Q3AM3UQ867SPQQA43P2F";
    String secretKey = "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG";
    MinioClient minioClient =
        MinioClient.builder().endpoint(endpoint).credentials(accessKey, secretKey).build();

    // Step 1: Initialize a multipart upload session
    String uploadId = minioClient.initiateMultipartUpload(bucketName, objectName).uploadId();
    List<Part> partList = new LinkedList<>();
    try {
      // Step 2: Upload parts of the file
      long fileSize = 0;
      InputStream stream = new FileInputStream(fileName);
      byte[] buffer = new byte[partSize];
      int bytesRead = stream.read(buffer, 0, partSize);
      while (bytesRead != -1) {
        fileSize += bytesRead;
        SecretKey secretKey = generateSecretKey();
        byte[] encryptedData = encryptData(buffer, secretKey);
        InputStream encryptedStream = new ByteArrayInputStream(encryptedData);
        Part part =
            minioClient.uploadPart(
                UploadPartArgs.builder()
                    .bucket(bucketName)
                    .object(objectName)
                    .uploadId(uploadId)
                    .partNumber(partList.size() + 1)
                    .stream(encryptedStream, encryptedData.length, -1)
                    .build());
        partList.add(part);
        bytesRead = stream.read(buffer, 0, partSize);
      }

      // Step 3: Complete the multipart upload
      CompleteMultipartUpload completeMultipartUpload =
          CompleteMultipartUpload.builder()
              .parts(partList)
              .build();
      minioClient.completeMultipartUpload(
          CompleteMultipartUploadArgs.builder()
              .bucket(bucketName)
              .object(objectName)
              .uploadId(uploadId)
              .build());

      System.out.println("Multipart upload completed successfully.");
    } catch (Exception e) {
      System.out.println("Error occurred: " + e.getMessage());
      // Step 4: Abort the multipart upload in case of error
      minioClient.abortMultipartUpload(
          AbortMultipartUploadArgs.builder()
              .bucket(bucketName)
              .object(objectName)
              .uploadId(uploadId)
              .build());
    }
  }

  private static byte[] encryptData(byte[] data, SecretKey secretKey) {
    // TODO: Implement your own encryption logic here
    return data;
  }

  private static SecretKey generateSecretKey() throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(256);
    return new SecretKeySpec(keyGenerator.generateKey().getEncoded(), "AES");
  }
}

上述代码中使用了AES算法对分片进行加密，可以根据实际需求替换成其他加密算法。此外，需要注意的是，分片上传的每个分片大小应该保持一致，否则可能会导致上传失败。