MinIO Java Client API

MinioClient

// 创建MinioClient
MinioClient minioClient = new MinioClient(endPoint, accessKey, secretAccessKey);

Object operations

statObject

// 获取对象的元数据, 如果对象不存在则抛出异常
public ObjectStat statObject(String bucketName, String objectName)

try {
	ObjectStat objectStat = minioClient.statObject("mybucket", "myobject");
} catch(MinioException e) {
	log.error(e.getMessage());
}

public ObjectStat statObject(String bucketName, String objectName, ServerSideEncryption sse)

putObject

/**
 * 将给定的文件最为对象上传到指定的bucket
 * 如果对象的大小超过5MB，客户端将自动使用多重会话(multipart session)
 * 
 * 如果多重会话失败，已经上传的部分将被自动流产
 * @param bucketName : Name of the bucket
 * @param objectName : Object name in the bucket
 * @param fileName : File name to upload
 * @param contentType : File content type of the object, user supplied
 */
public void putObject(String bucketName, String objectName, String fileName, String contentType)

try {
	minioClient.putObject("mybucket", "island.jpg", "/mnt/photos/island.jpg", "application/octet-stream")
} catch(MinioException e) {
	log.error(e.getMessage());
}

/**
 * 将给定的数据流作为对象上传到给定的bucket中，流的大小未知
 * 如果过流中有超过525MiB的数据， 客户端将自动使用多重会话(multipart session)
 * 
 * 如果多重会话失败，已经上传的部分将被自动流产
 * @param bucketName : Name of the bucket
 * @param objectName : Object name in the bucket
 * @param stream : stream to upload
 * @param contentType : File content type of the object, user supplied
 */
public void putObject(String bucketName, String objectName, InputStream stream, String contentType)

StringBuilder builder = new StringBuilder();
builder.append("");
ByteArrayInputStream bais = new ByteArrayInputStream(builder.toString().getBytes("UTF-8");
minioClient.putObject("my-bucketname", "my-objectname", bais, "application/octet-stream");
bais.close();

/**
 * @param size : Size of the data to read from stream that will be uploaded
 */
public void pubObject(String bucketName, String objectName, InputStream stream, long size, String contentType)

/**
 * 上传fileName文件的内容到objectName对象中
 * @param objectName : Object name in the bucket
 */
public void putObject(String bucketName, String objectName, String fileName)

/**
 * @param sse : 服务器端的加密形式
 */ 
public void putObject(String bucketName, String objectName, InputStream stream, long size, ServerSideEncryption sse)

/**
 * 将流作为对象上传到指定的bucket中，使用特定的元数据
 * @param headerMap : 自定义/额外 对象的元数据
 */
public void putObject(String bucketName, String objectName, InputStream stream, long size, Map headerMap)

...

getObject

/**
 * Downloads an object as stream
 * The InputStream must be closed after use else the connection will remain open.
 */
public InputStream getObject(String bucketName, String objectName)

try {
	// 如果没有找到对象，将抛出exception
	minioClient.statObject("mybucket", "myobject");
	
	InputStream stream = minioClient.getObject("mybucket", "myobject");
	... 
	stream.close();
} catch (MinioException e) {
	log.error(e.getMessage());
}

// 从offset处开始获取对象数据
public InputStream getObject(String bucketName, String objectName, long offset)

// 从offset出获取指定长度对象数据
public InputStream getObject(String bucketName, String objectName, long offset, Long length)

// 将对象作为文件保存到本地文件系统
public void getObject(String bucketName, String objectName, String fileName)

public InputStream getObject(String bucketName, String objectName, ServerSideEncryption sse)

Presigned operations （返回临时链接url)

presignedGetObject

// 返回一个临时URL地址，用来下载bucket 中的object对象，使用默认的过期时间。默认过期时间为7天，单位为秒。
public String presignedGetObject(String bucketName, String objectName)

/**
 * @Param expires : 过期时间，单位为秒，默认7天
 * @Return Url : 文件url
 */
public String presignedGetObject(String bucketName, String objectName, Integer expires)

presignedPutObject

/**
 * 上传文件，并返回文件下载url，设置默认过期时间为7天，单位为秒
 * @Return url : 文件下载的url
 */
public String presignedPutObject(String bucketName, String objectName)

/**
 * 上传文件，并返回文件下载url，设置过期时间，单位为秒
 * @Return url : 文件下载的url
 */
public String presignedPutObject(String bucketName, String objectName, Integer expires)

链接

Java Client API Reference