点击下载按钮根据需要的id调接口拿到返回需要下载的文件

再看返回的数据结构
数组中一个对象，就是一个文件，多个对象就是多个文件

下载函数

 // 下载
    tableDownload(row) {
      getuploadInventoryDownload({ sysBatch: row.sysBatch, fileName: row.fileName }).then((res) => {
        console.log(res)
        res.forEach((file, index) => {
          // elink.download = decodeURI(file.headers['Content-Disposition'][0].split(';')[1].split('=')[1])
          const name = decodeURI(file.headers['Content-Disposition'][0].split(';')[1].split('=')[1])
          const name2 = name.slice(8)
          console.log(name.slice(8))
          const blob = this.buildBlob(file.body)
          this.downLoadFile(blob, name2)
        })
      })
    },
    downLoadFile(blob, filename) {
      const link = document.createElement('a')
      link.href = window.URL.createObjectURL(blob)
      link.download = filename
      document.body.appendChild(link)

      link.click()
      URL.revokeObjectURL(link.href) // 释放URL 对象
      document.body.removeChild(link)
    },
    buildBlob(data) {
      const raw = window.atob(data)
      const rawLength = raw.length
      const uInt8Array = new Uint8Array(rawLength)
      for (let i = 0; i < rawLength; ++i) {
        uInt8Array[i] = raw.charCodeAt(i)
      }
      return new Blob([uInt8Array])
    },