文件存储与访问对于任何一个IT系统，都是必不可少的。
YC-Framework针对这样的情况，也提供一套解决方案，解决方案包含Nginx代理服务器方式、MinIO等。
Nginx代理服务器的方式，基于本地文件存储，文件存储的地方为对应服务器的磁盘空间上，然后通过Nginx代理进行访问。
关于Nginx相关实战系列文章，可以参考我写的这篇文章深入理解Nginx，该文章记录了Nginx常用的实战操作策略。
下面开始着重介绍，YC-Framework基于MinIO的分布式文件存储方案实践。
一、什么是MinIO?
MinIO是在GNU Affero通用公共许可证v3.0下发布的高性能对象存储。它与 Amazon S3云存储服务API兼容。使用MinIO为机器学习、分析和应用程序数据工作负载构建高性能基础架构。
二、MinIO的相关资料有哪些（强烈建议以官网为主，博客参考为辅）？
官方网站：
https://min.io/
官方文档：
https://docs.min.io/?ref=con
SDK使用文档：
https://docs.min.io/docs/java-client-quickstart-guide.html
三、在Linux上如何安装？
很简单一共四步：
# Downloadwget https://dl.min.io/server/minio/release/linux-amd64/minio# Authorizationchmod +x minio# RunMINIO_ROOT_USER=admin MINIO_ROOT_PASSWORD=minio_admin ./minio server /mnt/data --console-address "0.0.0.0:21218"# Backup RunMINIO_ROOT_USER=admin MINIO_ROOT_PASSWORD=minio_admin nohup ./minio server /mnt/data --console-address "0.0.0.0:21218" &
Windows安装更简单，这里不再赘述，大家可以参考官方文档！！！
四、在Java项目中如何使用MinIO？
1.引入Maven依赖
<properties>
<minio.version>8.4.1</minio.version>
<okhttp.version>4.8.1</okhttp.version>
</properties>
<dependency>
<groupId>io.minio</groupId>
<artifactId>minio</artifactId>
<version>${minio.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>${okhttp.version}</version>
</dependency>
2.配置类
@Configuration
public class MinIOConfig {
@Bean
public MinioClient minioClient() {
MinioClient minioClient = MinioClient.builder().endpoint("http://127.0.0.1:9000")
.credentials("minioadmin", "minioadmin") //minIO默认用户名和密码，上生产一定要更改
.build();
return minioClient;
}
}
3.工具类
@Component
public class MinioUtil {
private static final String MINIO_BUCKET = "yc-framework";
@Autowired
private MinioClient minioClient;
/**
* 查看存储bucket是否存在
*
* @return boolean
*/
public Boolean bucketExists(String bucketName) {
Boolean found;
try {
found = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
} catch (Exception e) {
e.printStackTrace();
return false;
}
return found;
}
/**
* 创建存储bucket
*
* @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
*
* @return Boolean
*/
public Boolean removeBucket(String bucketName) {
try {
minioClient.removeBucket(RemoveBucketArgs.builder()
.bucket(bucketName)
.build());
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 获取全部bucket
*/
public List<Bucket> getAllBuckets() {
try {
List<Bucket> buckets = minioClient.listBuckets();
return buckets;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 文件上传
*
* @param file 文件
* @return Boolean
*/
public String upload(MultipartFile file) {
String originalFilename = file.getOriginalFilename();
if (StrUtil.isBlank(originalFilename)) {
throw new RuntimeException();
}
String fileName = UuidUtils.generateUuid() + originalFilename.substring(originalFilename.lastIndexOf("."));
String objectName = IdUtil.simpleUUID() + "_" + fileName;
System.out.println("objectName:" + objectName);
try {
PutObjectArgs objectArgs = PutObjectArgs.builder().bucket(MINIO_BUCKET).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;
}
/**
* 预览图片
*
* @param fileName
* @return
*/
public String preview(String fileName) {
// 查看文件地址
GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder().bucket(MINIO_BUCKET).object(fileName).method(Method.GET).build();
try {
String url = minioClient.getPresignedObjectUrl(build);
return url;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 文件下载
*
* @param fileName 文件名称
* @param res response
* @return Boolean
*/
public void download(String fileName, HttpServletResponse res) {
GetObjectArgs objectArgs = GetObjectArgs.builder().bucket(MINIO_BUCKET)
.object(fileName).build();
try (GetObjectResponse response = minioClient.getObject(objectArgs)) {
byte[] buf = new byte[1024];
int len;
try (FastByteArrayOutputStream os = new FastByteArrayOutputStream()) {
while ((len = response.read(buf)) != -1) {
os.write(buf, 0, len);
}
os.flush();
byte[] bytes = os.toByteArray();
res.setCharacterEncoding("utf-8");
// 设置强制下载不打开
// res.setContentType("application/force-download");
res.addHeader("Content-Disposition", "attachment;fileName=" + fileName);
try (ServletOutputStream stream = res.getOutputStream()) {
stream.write(bytes);
stream.flush();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 查看文件对象
*
* @return 存储bucket内文件对象信息
*/
public List<Item> listObjects() {
Iterable<Result<Item>> results = minioClient.listObjects(
ListObjectsArgs.builder().bucket(MINIO_BUCKET).build());
List<Item> items = new ArrayList<>();
try {
for (Result<Item> result : results) {
items.add(result.get());
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
return items;
}
/**
* 删除
*
* @param fileName
* @return
* @throws Exception
*/
public boolean remove(String fileName) {
try {
minioClient.removeObject(RemoveObjectArgs.builder().bucket(MINIO_BUCKET).object(fileName).build());
} catch (Exception e) {
return false;
}
return true;
}
}
4.核心Controller代码
@RestController
@Api(tags = {"基于MinIO对象存储"}, description = "基于MinIO对象存储")
public class MinIOController {
@Autowired
private MinioUtil minioUtil;
@GetMapping("/bucketExists")
@ApiOperation(value = "查看存储bucket是否存在")
public RespBody bucketExists(String bucketName) {
return RespBody.success(minioUtil.bucketExists(bucketName));
}
@GetMapping("/makeBucket")
@ApiOperation(value = "创建存储bucket")
public RespBody makeBucket(String bucketName) {
minioUtil.makeBucket(bucketName);
return RespBody.success();
}
@GetMapping("/removeBucket")
@ApiOperation(value = "删除存储bucket")
public RespBody removeBucket(String bucketName) {
minioUtil.removeBucket(bucketName);
return RespBody.success();
}
@GetMapping("/getAllBuckets")
@ApiOperation(value = "获取全部bucket")
public RespBody<List<Bucket>> getAllBuckets() {
List<Bucket> allBuckets = minioUtil.getAllBuckets();
return RespBody.success(allBuckets);
}
@PostMapping("/upload")
@ApiOperation(value = "文件上传返回url")
public RespBody<String> upload(@RequestParam(value = "file") MultipartFile file) {
String objectName = minioUtil.upload(file);
if (null != objectName) {
String endPoint = "http://127.0.0.1:9000";
return RespBody.success(endPoint + "/" + objectName);
}
return RespBody.fail();
}
@GetMapping("/preview")
@ApiOperation(value = "图片/视频预览")
public RespBody preview(@RequestParam("fileName") String fileName) {
return RespBody.success(minioUtil.preview(fileName));
}
@GetMapping("/download")
@ApiOperation(value = "文件下载")
public RespBody download(@RequestParam("fileName") String fileName, HttpServletResponse res) {
minioUtil.download(fileName, res);
return RespBody.success();
}
@PostMapping("/delete")
@ApiOperation(value = "删除文件", notes = "根据url地址删除文件")
public RespBody remove(String url) {
String objName = url.substring(url.lastIndexOf("test" + "/") + "test".length() + 1);
minioUtil.remove(objName);
return RespBody.success();
}
}
5.启动yc-file微服务进行测试
(1)上传
(2)预览
源代码均已开源.
YC-Framework官网：
https://framework.youcongtech.com/
YC-Framework Github源代码：
https://github.com/developers-youcong/yc-framework
YC-Framework Gitee源代码：
https://gitee.com/developers-youcong/yc-framework
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