下载文件

1.写axios接口 responseType: 'blob' 这个是设置请求返回类型的

import axios from 'axios'

`export const uploadFileRequest = (url, body, params) => {
  let token = getTokens()
  let queryParams = { 'access_token': token.access_token }
  Object.assign(queryParams, params)
  return axios({
    method: 'post',
    url: `${base}${url}`,
    data: body,
    params: queryParams,
    responseType: 'blob'
  })
}`

2.调用接口，拿到返回值，模拟超链接点击下载文件

exportLogZIP('/download', '',{  id: 1 }).then(res => {
  const content = res
  const blob = new Blob([content])
  const fileName = 'LOG.zip'
  if ('download' in document.createElement('a')) { // 非IE下载
    const elink = document.createElement('a')
    elink.download = fileName
    elink.style.display = 'none'
    elink.href = URL.createObjectURL(blob)
    document.body.appendChild(elink)
    elink.click()
    URL.revokeObjectURL(elink.href) // 释放URL 对象
    document.body.removeChild(elink)
  } else { // IE10+下载
    navigator.msSaveBlob(blob, fileName)
  }
})

例子 fetch 导出表格

`let params = {
        batchNum: val,
        id: id,
      };
      fetch("/api/billBatch/export", {
        method: "post",
        　headers:{
    　　　　'Content-Type' : 'application/json',
            'admin_token': cookies.get('admin_token'),
    　　},
        body: JSON.stringify(params),
        responseType: "blob",
      }).then(res => { 
           return res.blob();
        }).then(content  => {  
          const blob = new Blob([content],{type: 'application/vnd.ms-excel'});
          const fileName = "结算单" + '.xlsx'
          if ('download' in document.createElement('a')) { // 非IE下载
            const elink = document.createElement('a')
            elink.download = fileName
            elink.style.display = 'none'
            elink.href = URL.createObjectURL(blob)
            document.body.appendChild(elink)
            elink.click()
            URL.revokeObjectURL(elink.href) // 释放URL 对象
            document.body.removeChild(elink)
          } else { // IE10+下载
            navigator.msSaveBlob(blob, fileName)
          }
        }).catch(r=>{
        })`
`