vue+axios实现文件下载及vue中使用axios的实例

axios({
  method: 'post',
  url: 'api/user/',
  data: {
    firstName: 'Fred',
    lastName: 'Flintstone'
  },
  responseType: 'blob'
}).then(response => {
  this.download(response)
}).catch((error) => {

})

methods: {
  // 下载文件
  download (data) {
    if (!data) {
      return
    }
    let url = window.URL.createObjectURL(new Blob([data]))
    let link = document.createElement('a')
    link.style.display = 'none'
    link.href = url
    link.setAttribute('download', 'excel.xlsx')

    document.body.appendChild(link)
    link.click()
  }
}

<script src="https://unpkg.com/axios/dist/axios.min.js"></script>

import axios from 'axios';
let http = axios.create({
 baseURL: 'http://localhost:8080/',
 withCredentials: true,
 headers: {
  'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8'
 },
 transformRequest: [function (data) {
  let newData = '';
  for (let k in data) {
   if (data.hasOwnProperty(k) === true) {
    newData += encodeURIComponent(k) + '=' + encodeURIComponent(data[k]) + '&';
   }
  }
  return newData;
 }]
});
function apiAxios(method, url, params, response) {
 http({
  method: method,
  url: url,
  data: method === 'POST' || method === 'PUT' ? params : null,
  params: method === 'GET' || method === 'DELETE' ? params : null,
 }).then(function (res) {
  response(res);
 }).catch(function (err) {
  response(err);
 })
}
export default {
 get: function (url, params, response) {
  return apiAxios('GET', url, params, response)
 },
 post: function (url, params, response) {
  return apiAxios('POST', url, params, response)
 },
 put: function (url, params, response) {
  return apiAxios('PUT', url, params, response)
 },
 delete: function (url, params, response) {
  return apiAxios('DELETE', url, params, response)
 }
}

import Api from './api/index.js';
Vue.prototype.$api = Api;

this.$api.post('user/login.do(地址)', {
  "参数名": "参数值"
}, response => {
   if (response.status >= 200 && response.status < 300) {
    console.log(response.data);\\请求成功，response为成功信息参数
   } else {
    console.log(response.message);\\请求失败，response为失败信息
   }
});