EasyPoi导入数据后，导出发生错误的数据报[object Object]

后台输出流到前端

//有错误信息，就导出文件
            if (errorList != null && errorList.size() > 0) {
                String title = "导入国产药数据的异常数据";
                ExcelUtils.exportExcel(errorList, title, title, StandardCode.class, title, response);
                return null;
            }

在响应拦截器中加以下代码：

if (headers['content-type'].toLowerCase() === 'application/vnd.ms-excel;charset=utf-8') {
          return response
      }

如果不加这段代码会报错：

No converter for [class com.ljxx.entity.Result] with preset Content-Type 'application/vnd.ms-excel;charset=UTF-8'

由于上述代码返回的是response，故使用filedownload下载的时候应该为response.data

handleUploadChange1(file) {
      if (file.name.lastIndexOf('.') < 0) {
        this.$message.error('上传文件只能是xls、xlsx格式!')
        return
      }
      const testMsg = file.name.substring(file.name.lastIndexOf('.') + 1).toLowerCase()
      const extensionXLS = testMsg == 'xls'
      const extensionXLSX = testMsg == 'xlsx'
      if (!extensionXLS && !extensionXLSX) {
        this.$message.error('上传文件只能是xls、xlsx格式!')
        return
      }
      const isLt2M = file.size / 1024 / 1024 < 2
      if (!isLt2M) {
        this.$message.error('上传文件不能超过 2MB!')
        return
      }
      console.log('import continue')
      this.importLoading = true
      this.importDisabled = true
      const data = new FormData()
      data.append('file', file.raw)
      standardCode.importDomesticExcel(data).then(response => {
        console.log(response)
        if (response.success) {
          this.open2(response.msg)
          this.importLoading = false
          this.importDisabled = false
          this.getList()
        } else {
          this.$message.success("部分数据导入失败，数据已下载到本地，请查看！")
          fileDownload(response.data, '导入数据中的异常数据.xlsx')
          // this.open2(response.msg)
          this.importLoading = false
          this.importDisabled = false
        }
      }).catch(() => {
        this.open2('抱歉，导入失败')
        this.importLoading = false
        this.importDisabled = false
      })
    },

 如果报错文件打不开，如下：

 

 

 是因为responseType值应为arraybuffer,而不能是arraybuffer;charset=utf-8

importDomesticExcel(data) {
    return request({
      url: '/standardCode/import',
      method: 'post',
      data: data,
      responseType: 'arraybuffer',
      headers: {
        'Content-Type': 'multipart/form-data'
      }
    })
  },