---

引入相关依赖

javascript">  <dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>8.5.6</version></dependency>

如果出现报错：

Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location
io.minio.S3Base.(S3Base.java:105)
The following method did not exist:okhttp3.RequestBody.create([BLokhttp3/MediaType,)Lokhttp3/RequestBody,

• 依赖冲突问题请参考这篇博客：springboot项目启动报错

配置application.yml文件

在application.yml种添加minio配置，注意yml文件的格式

javascript">minio:config:url: http://127.0.0.1:9005 #ip地址accessKey: name #  账号secretKey: password #  密码secure: false #如果是true，则用的是https而不是http,默认值是truebucketName: "studyphoto-oss"  # 自己bucket桶的名字 相当于文件夹

编写minio的config文件

javascript">//导包
import io.minio.MinioClient;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Data
@Configuration
@ConfigurationProperties(prefix = "minio.config")
public class MinioConfig {/*** 服务地址*/private String url;/*** 用户名*/private String accessKey;/*** 密码*/private String secretKey;/*** 存储桶名称*/private String bucketName;@Beanpublic MinioClient getMinioClient() {return MinioClient.builder().endpoint(url).credentials(accessKey, secretKey).build();}
}

编写minio的工具类

为了方便开发，将minio的操作封装为一个工具类

javascript">//导包import com.wedu.config.MinioConfig;
import io.minio.MinioClient;
import io.minio.PutObjectArgs;
import io.minio.StatObjectArgs;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;import javax.annotation.Resource;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;/****/
@Component
public class MinioUtils {/*** minio进行文件上传的注入工作* @param minioConfig* @param client ：用于与MinIO服务进行交互，执行对象的存储操作(文件的上传、下载、删除等)*/// 注入minio配置文件@Autowiredprivate MinioConfig minioConfig;// 注入minio client@Autowiredprivate MinioClient client;/*** 文件上传minio* @param originalFilename* @param file* @return*/public String upload(String originalFilename, MultipartFile file) {String url="";// 获取文件的扩展名 例如.jpg .docString extname = originalFilename.substring(originalFilename.lastIndexOf("."));// 构建文件上传相关信息PutObjectArgs args = null;try {args = PutObjectArgs.builder()// 构建上传文件信息.bucket(minioConfig.getBucketName())//设置桶名.object(originalFilename)//设置文件名.stream(file.getInputStream(), file.getSize(), -1)//设置上传流.contentType(file.getContentType())//设置文件类型.build();// 将文件上传到minio服务器client.putObject(args);} catch (Exception e){e.printStackTrace();}// 组装文件信息，返回前端 或者存入数据路// 文件访问路径: http://127.0.0.1:9005/bucketName/objectNameurl = minioConfig.getUrl() + "/" + minioConfig.getBucketName() + "/" + originalFilename;return url;}/*** 判断文件是否存在* @param originalFilename* @return true存在*/public Boolean checkFileIsExist(String originalFilename) {try {client.statObject(StatObjectArgs.builder().bucket(minioConfig.getBucketName()).object(originalFilename).build());} catch (Exception e) {
//            e.printStackTrace();return false;}return true;}/*** 获取文件访问路径* @param originalFilename* @return*/public String getFileUrl(String originalFilename){return minioConfig.getUrl() + "/" + minioConfig.getBucketName() + "/" + originalFilename;}
}

其余操作(文件删除等 )可参考这篇博客：Minio工具类

图片文件上传测试

• 控制层：SysUserController.java

javascript">@Autowiredprivate SysUserService sysUserService;/***  上传头像* @param file* @return 返回图片的访问路径* @throws IOException*/@PostMapping("upload")public R upload(@RequestParam("file") MultipartFile file) throws IOException {SysUserEntity user = getUser();//获取当前登录用户String url=sysUserService.uploadAvatar(file,user);return R.ok().put("url",url);}

• Service层接口

javascript">/*** 上传头像* @param file* @param user* @return 返回图片的访问路径*/String uploadAvatar(MultipartFile file, SysUserEntity user);

• Service层实现类

注意一定要注入minio的工具类

javascript">@Autowiredprivate MinioUtils minioUtils;//注入minio工具类/*** 上传头像* @param file* @param user* @return 返回图片的访问路径*/@Overridepublic String uploadAvatar(MultipartFile file, SysUserEntity user) {String url="";try {// 获取文件真实名称String originalFilename = file.getOriginalFilename();// 判断文件是否已经存在 不存在才进行上传和存储数据库操作if(!minioUtils.checkFileIsExist(originalFilename)){url = minioUtils.upload(originalFilename, file);user.setAvatar(url);// 更新用户头像url地址this.update(user);// 更新数据库中用户头像url地址}else {url=minioUtils.getFileUrl(originalFilename);}} catch (Exception e) {
//			throw new ServerException("文件上传异常" + e.getCause().toString());
//			try {
//				throw new ServerException("文件上传异常" + e.getCause().toString(),1,null);
//			} catch (ServerException ex) {
//				ex.printStackTrace();
//			}}return url;}