springboot上传文件

private final static String FILE_UPLOAD_PATH = "D:\\upload\\";
    @RequestMapping(value = "/uploadFile",method = RequestMethod.POST)
    @ResponseBody
    public R uploadFile(@RequestParam("file") MultipartFile file){
        if (file.isEmpty()){

        }
        String fileName = file.getOriginalFilename();
        String suffixName = fileName.substring(fileName.lastIndexOf("."));
        //生成文件名称通用方法
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
        Random r = new Random();
        StringBuilder tempName = new StringBuilder();
        tempName.append(sdf.format(new Date())).append(r.nextInt(100)).append(suffixName);
        String newFileName = tempName.toString();
        try {
            //保存文件
            byte[] bytes = file.getBytes();
            Path path = Paths.get(FILE_UPLOAD_PATH+newFileName);
            Files.write(path,bytes);
        }catch (IOException e){
            e.printStackTrace();
        }
        return R.ok().data("url","file:///D:/upload/20231203_15332731.png");
    }

前台代码

<el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="auto"
                        :height="auto"
                        :key="imagecropperKey"
                        :url="'http://localhost:8001' + '/upload/uploadFile'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>