minio分片上传java

要进行minio分片上传，可以使用minio-java SDK。具体步骤如下：

1. 初始化minio客户端对象

MinioClient minioClient = new MinioClient("http://localhost:9000", "accessKey", "secretKey");

2. 设置分片大小和上传的文件对象

int partSize = 5 * 1024 * 1024; // 5MB

File file = new File("path/to/file");

3. 开始上传文件

String objectName = "object-name";
String uploadId = null;

try {
    // Initiate upload request
    uploadId = minioClient.initiateMultipartUpload("bucket-name", objectName);

    // Upload the first part
    FileInputStream fis = new FileInputStream(file);
    minioClient.uploadPart("bucket-name", objectName, uploadId, 1, fis, partSize);
    fis.close();

    // Upload the second part
    fis = new FileInputStream(file);
    fis.skip(partSize);
    minioClient.uploadPart("bucket-name", objectName, uploadId, 2, fis, partSize);
    fis.close();

    // ... Upload remaining parts

    // Complete the upload
    List<PartETag> partETags = new ArrayList<>();
    for (int i = 1; i <= partCount; i++) {
        partETags.add(new PartETag(i, getEtagForPart(i)));
    }
    minioClient.completeMultipartUpload("bucket-name", objectName, uploadId, partETags);
} catch (Exception e) {
    if (uploadId != null) {
        minioClient.abortMultipartUpload("bucket-name", objectName, uploadId);
    }
}

其中 `getEtagForPart` 方法用于计算每个分片的ETag值，可以使用公式 `Integer.toHexString(Arrays.hashCode(bytes))` 来实现。