一，安装

　　npm install axios

二，在http.js中引入

　　import axios from 'axios';

三，定义http request 拦截器，添加数据请求公用信息

1 axios.interceptors.request.use( 2     config => { 3         // const token = getCookie('名称');注意使用的时候需要引入cookie方法，推荐js-cookie 4         //config.data = JSON.stringify(config.data); 5         let token = localStorage.token; 6         //let token = 'xxx'; 7         let appid = 'xxx'; 8         let appID = decodeURIComponent(appid); 9         config.headers.token = token;10         //config.headers['Content-Type'] = 'application/x-www-form-urlencoded';11 12         if (config.method == 'get') {13             config.params.app_id = appID14             config.params.token = token15         }16         if (config.method == 'post') {17             config.data.token = token18             config.data.app_id = appID19         }20 21         return config;22     },23     error => {24         return Promise.reject(err);25     }26 );

四，封装get方法

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

五，封装post方法

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

六，封装patch请求

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

七，封装put请求

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

八，实现跨域

1 const downloadUrl = url => {2     let iframe = document.createElement('iframe')3     iframe.style.display = 'none'4     iframe.src = url5     iframe.onload = function() {6         document.body.removeChild(iframe)7     }8     document.body.appendChild(iframe)9 }

九，方法的使用

　　在main.js里引入http.js

　　

1 import Vue from 'vue'2 import App from './App'3 import router from './router'4 import axios from 'axios'5 import {get, post } from '@/utils/http'6 7 Vue.prototype.$ajax = axios;8 Vue.prototype.$post = post;9 Vue.prototype.$get = get;

　　在需要调用的地方

　　

this.$get(url).then((response) => {                   }})

this.$post(url, data).then((response) => {                   }})

this.$put(url, data).then((response) => {                   }})

this.$patch(url, data).then((response) => {                   }})