MinIO Client (mc)为ls，cat，cp，mirror，diff，find等UNIX命令提供了一种替代方案。它支持文件系统和兼容Amazon S3的云存储服务（AWS Signature v2和v4）。
指南：
http://t.zoukankan.com/lvzhenjiang-p-14944821.html
import com.alibaba.nacos.common.utils.UuidUtils;
import com.youming.shuiku.system.business.minio.ObjectItem;
import io.minio.BucketExistsArgs;
import io.minio.GetObjectArgs;
import io.minio.GetPresignedObjectUrlArgs;
import io.minio.ListObjectsArgs;
import io.minio.MakeBucketArgs;
import io.minio.MinioClient;
import io.minio.PutObjectArgs;
import io.minio.RemoveBucketArgs;
import io.minio.RemoveObjectsArgs;
import io.minio.Result;
import io.minio.StatObjectArgs;
import io.minio.StatObjectResponse;
import io.minio.http.Method;
import io.minio.messages.DeleteError;
import io.minio.messages.DeleteObject;
import io.minio.messages.Item;
import org.apache.commons.io.IOUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
@Component
public class MinioUtilS {
@Autowired
private MinioClient minioClient;
@Value("${minio.bucketName}")
private String bucketName;
/**
* description: 判断bucket是否存在，不存在则创建
*
* @return: void
*/
public void existBucket(String name) {
try {
boolean exists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(name).build());
if (!exists) {
minioClient.makeBucket(MakeBucketArgs.builder().bucket(name).build());
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 创建存储bucket
* @param bucketName 存储bucket名称
* @return Boolean
*/
public Boolean makeBucket(String bucketName) {
try {
minioClient.makeBucket(MakeBucketArgs.builder()
.bucket(bucketName)
.build());
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 删除存储bucket
* @param bucketName 存储bucket名称
* @return Boolean
*/
public Boolean removeBucket(String bucketName) {
try {
minioClient.removeBucket(RemoveBucketArgs.builder()
.bucket(bucketName)
.build());
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* description: 上传文件
*
* @param multipartFile
* @return: java.lang.String
*/
public List<String> upload(MultipartFile[] multipartFile) {
List<String> names = new ArrayList<>(multipartFile.length);
for (MultipartFile file : multipartFile) {
String fileName = file.getOriginalFilename();
String[] split = fileName.split("\\.");
if (split.length > 1) {
fileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
} else {
fileName = fileName + System.currentTimeMillis();
}
InputStream in = null;
try {
in = file.getInputStream();
minioClient.putObject(PutObjectArgs.builder()
.bucket(bucketName)
.object(fileName)
.stream(in, in.available(), -1)
.contentType(file.getContentType())
.build()
);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
names.add(fileName);
}
return names;
}
// TODO: 2022/7/15 其他方案
/**
* 文件上传
*
* @param file 文件
* @return Boolean
*/
/* public String upload(MultipartFile file) {
String originalFilename = file.getOriginalFilename();
if (StringUtils.isBlank(originalFilename)){
throw new RuntimeException();
}
String fileName = UuidUtils.generateUuid() + originalFilename.substring(originalFilename.lastIndexOf("."));
String objectName = CommUtils.getNowDateLongStr("yyyy-MM/dd") + "/" + fileName;
try {
PutObjectArgs objectArgs = PutObjectArgs.builder().bucket(prop.getBucketName()).object(objectName)
.stream(file.getInputStream(), file.getSize(), -1).contentType(file.getContentType()).build();
//文件名称相同会覆盖
minioClient.putObject(objectArgs);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return objectName;
}*/
/**
* description: 下载文件
*
* @param fileName
* @return: org.springframework.http.ResponseEntity<byte [ ]>
*/
public ResponseEntity<byte[]> download(HttpServletResponse response, String fileName) {
ResponseEntity<byte[]> responseEntity = null;
InputStream in = null;
ByteArrayOutputStream out = null;
try {
StatObjectResponse statObjectResponse = minioClient.statObject(StatObjectArgs.builder().bucket(bucketName)
.object(fileName).build());
response.setContentType(statObjectResponse.contentType());
response.setHeader("Content-Disposition","attachment;filename=" +
URLEncoder.encode(fileName,"UTF-8"));
in = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(fileName).build());
out = new ByteArrayOutputStream();
IOUtils.copy(in, response.getOutputStream());
//封装返回值
byte[] bytes = out.toByteArray();
HttpHeaders headers = new HttpHeaders();
try {
headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
headers.setContentLength(bytes.length);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setAccessControlExposeHeaders(Arrays.asList("*"));
responseEntity = new ResponseEntity<byte[]>(bytes, headers, HttpStatus.OK);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return responseEntity;
}
/**
* 查看文件对象
* @param bucketName 存储bucket名称
* @return 存储bucket内文件对象信息
*/
public List<ObjectItem> listObjects(String bucketName) {
Iterable<Result<Item>> results = minioClient.listObjects(
ListObjectsArgs.builder().bucket(bucketName).build());
List<ObjectItem> objectItems = new ArrayList<>();
try {
for (Result<Item> result : results) {
Item item = result.get();
ObjectItem objectItem = new ObjectItem();
objectItem.setObjectName(item.objectName());
objectItem.setSize(item.size());
objectItems.add(objectItem);
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
return objectItems;
}
/**
* 预览图片
* @param fileName
* @return
*/
public String preview(String fileName){
// TODO: 2022/7/15 待验证
// 查看文件地址
GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder().bucket(bucketName).object(fileName).method(Method.GET).build();
try {
String url = minioClient.getPresignedObjectUrl(build);
return url;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 批量删除文件对象
* @param bucketName 存储bucket名称
* @param objects 对象名称集合
*/
public Iterable<Result<DeleteError>> removeObjects(String bucketName, List<String> objects) {
List<DeleteObject> dos = objects.stream().map(e -> new DeleteObject(e)).collect(Collectors.toList());
Iterable<Result<DeleteError>> results = minioClient.removeObjects(RemoveObjectsArgs.builder().bucket(bucketName).objects(dos).build());
return results;
}
}