SpringBoot+Vue项目多文件上传同时上传其他参数

Java后端接收 POST

@ApiOperation(value = "添加测试报告信息", notes = "添加测试报告信息")
@EnableAuth
@PostMapping(value = "/saveTestReport")
@Transactional(rollbackFor = Exception.class)
public ResultData saveTestReport(@RequestParam(value = "files") List<MultipartFile> files,
                                 TestReport testReport) {

前端核心代码：

<el-col :span="24">
  <el-form-item label="上传文件 :">
    <template slot-scope="scope">
      <el-upload ref="MultipartFile1"
                 style="display: inline"
                 v-show="dialogInfo.type==='2'"
                 action=""
                 :file-list="fileList"
                 list-type="picture-card"
                 accept="image/*"
                 :disabled="isDisabled"
                 :auto-upload="false"
                 multiple
                 :before-upload="beforeUpload"
                 :on-exceed="onExceed"
                 :on-error="onError"
      >
        <i class="el-icon-plus"></i>
      </el-upload>
      <el-upload ref="MultipartFile"
                 class="upload-demo"
                 v-show="dialogInfo.type==='1'"
                 action=""
                 :file-list="fileList1"
                 accept=".pdf"
                 :auto-upload="false"
                 :disabled="isDisabled"
                 multiple
                 :before-upload="beforeUploadPdf"
                 :on-exceed="onExceedPdf"
                 :on-error="onErrorPdf"
      >
        <el-button size="small" type="primary">点击上传</el-button>
        <div slot="tip" class="el-upload__tip">只能上传pdf文件</div>
      </el-upload>
    </template>
  </el-form-item>
</el-col>

fillFormData(){
  let formData = new FormData();
  let MultipartFiles;
  if (this.dialogInfo.type==='1'){//pdf
    MultipartFiles = this.$refs['MultipartFile'].uploadFiles;//文件
  }else{//图片
    MultipartFiles = this.$refs['MultipartFile1'].uploadFiles;//文件
  }
  if(MultipartFiles===undefined){
    this.$message.error("请上传文件");
    return false;
  }
  this.dialogInfo.unitName=this.selectValHome1
  for(let key in this.dialogInfo){
    formData.append(key, this.dialogInfo[key]);
  }
  for(let i=0;i<MultipartFiles.length;i++) {
    formData.append("files", MultipartFiles[i].raw);
  }
  formData.delete('createTime');
  formData.delete('updateTime');
  formData.delete('status');
  return formData;
},