cnpm install axios -S

import axios from 'axios';
import { Message } from 'element-ui';

axios.defaults.timeout = 5000;
axios.defaults.baseURL ='';


//http request 拦截器
axios.interceptors.request.use(
 config => {
  // const token = getCookie('名称');注意使用的时候需要引入cookie方法，推荐js-cookie
  config.data = JSON.stringify(config.data);
  config.headers = {
   'Content-Type':'application/x-www-form-urlencoded'
  }
  // if(token){
  //  config.params = {'token':token}
  // }
  return config;
 },
 error => {
  return Promise.reject(err);
 }
);


//http response 拦截器
axios.interceptors.response.use(
 response => {
  if(response.data.errCode ==2){
   router.push({
    path:"/login",
    querry:{redirect:router.currentRoute.fullPath}//从哪个页面跳转
   })
  }
  return response;
 },
 error => {
  return Promise.reject(error)
 }
)


/**
 * 封装get方法
 * @param url
 * @param data
 * @returns {Promise}
 */

export function fetch(url,params={}){
 return new Promise((resolve,reject) => {
  axios.get(url,{
   params:params
  })
  .then(response => {
   resolve(response.data);
  })
  .catch(err => {
   reject(err)
  })
 })
}


/**
 * 封装post请求
 * @param url
 * @param data
 * @returns {Promise}
 */

 export function post(url,data = {}){
  return new Promise((resolve,reject) => {
   axios.post(url,data)
     .then(response => {
      resolve(response.data);
     },err => {
      reject(err)
     })
  })
 }

 /**
 * 封装patch请求
 * @param url
 * @param data
 * @returns {Promise}
 */

export function patch(url,data = {}){
 return new Promise((resolve,reject) => {
  axios.patch(url,data)
     .then(response => {
      resolve(response.data);
     },err => {
      reject(err)
     })
 })
}

 /**
 * 封装put请求
 * @param url
 * @param data
 * @returns {Promise}
 */

export function put(url,data = {}){
 return new Promise((resolve,reject) => {
  axios.put(url,data)
     .then(response => {
      resolve(response.data);
     },err => {
      reject(err)
     })
 })
}

import axios from 'axios'
import {post,fetch,patch,put} from './utils/http'
//定义全局变量
Vue.prototype.$post=post;
Vue.prototype.$fetch=fetch;
Vue.prototype.$patch=patch;
Vue.prototype.$put=put;

mounted(){
  this.$fetch('/api/v2/movie/top250')
   .then((response) => {
    console.log(response)
   })
 },

其余的方法一样