1、在nacos中配置minio参数

 2、controller层

package com.heima.wemedia.controller.v1;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.wemedia.service.WmMaterialService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
@RequestMapping("/api/v1/material")
public class WmMaterialController {

    @Autowired
    WmMaterialService wmMaterialService;

    @PostMapping("/upload_picture")
    public ResponseResult upload(MultipartFile multipartFile){
        return wmMaterialService.upload(multipartFile);
    }

}

3、接口实现类

     封装minio上传工具Minio： 封装MinIO为starter_moreCalm的博客-CSDN博客

     获取用户id的前置工作 微服务：从header中获取用户存入当前线程_moreCalm的博客-CSDN博客

package com.heima.wemedia.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.file.service.FileStorageService;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.common.wemedia.model.po.WmMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.time.LocalDateTime;
import java.util.UUID;

/**
 * <p>
 * 自媒体图文素材信息表 服务实现类
 * </p>
 *
 * @author itcast
 * @since 2023-08-05
 */
@Service
@Slf4j
public class WmMaterialServiceImpl extends ServiceImpl<WmMaterialMapper, WmMaterial> implements WmMaterialService {
    @Autowired
    private FileStorageService fileStorageService;


    /*图片上传*/
    @Override
    public ResponseResult upload(MultipartFile file) {

        /*参数校验*/
        if(file == null || file.getSize() <= 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        /*上传图片到minio*/
        //生成uuid
        String fileName = UUID.randomUUID().toString().replace("-", "");
        //获取图片名称
        String originalFilename = file.getOriginalFilename();
        //获取文件扩展名（后缀名）
        String postfix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //定义文件id用来接收上传的图片
        String fileId = null;

        try {
            fileId = fileStorageService.uploadImgFile("", fileName + postfix, file.getInputStream());
            log.info("上传图片到MinIO中，fileId:{}",fileId);
        } catch (IOException e) {
            e.printStackTrace();
            log.error("WmMaterialServiceImpl-上传文件失败");
        }

        /*保存数据到数据库中*/
        WmMaterial wmMaterial = new WmMaterial();
        wmMaterial.setUserId(WmThreadLocalUtil.getUser().getId());//用户id
        wmMaterial.setUrl(fileId);//图片地址
        wmMaterial.setType(0);//文件类型（0 图片 1 视频）
        wmMaterial.setCollection(0);//是否收藏
        wmMaterial.setCreatedTime(LocalDateTime.now());//创建时间
        save(wmMaterial);//保存数据库

        /*返回结果*/
        return ResponseResult.okResult(wmMaterial);
    }
}