前端将后端返回的文件流转成url

// 将返回的流数据转换为url
export function getObjectURL(file, type) {
  return window.URL.createObjectURL(new Blob([file], { type }))
}

// base64转url
export function base64ToUrl(data, type) {
  let base64 = data
  let bstr = atob(base64)
  let n = bstr.length
  let u8arr = new Uint8Array(n)
  while (n--) {
    u8arr[n] = bstr.charCodeAt(n)
  }
  //确定解析格式
  let blob = new Blob([u8arr], { type:'application/pdf;chartset=UTF-8' })
  let url = window.URL.createObjectURL(blob)
  return url
}

this.pdfUrl = getObjectURL(res.data, 'application/pdf;chartset=UTF-8')

返回的数据格式：

效果图：