JS最新技术ES6，结合Vue全局注册，实现Axios封装配置插件！

//file：src/api/http/http.js

import axios from 'axios'
axios.create();
axios.interceptors.request.use((config)=>{  //axios请求拦截
    return config;  //记得return请求
})
axios.interceptors.response.use((response)=>{
    return response;
})
class http{
    static async get(url,params,contentType="application/x-www-form-urlencoded"){
       return await axios.get(url,{
           params,
           headers:{
               "Content-Type":contentType
           }
       })
    }
    static async post(url,params,contentType="application/x-www-form-urlencoded"){
        return await axios.post(url,params,{
            headers:{
                "Content-Type":contentType
            }
        })
    }
}
export default http

//file: src/api/http/login.js

import http from './http'
export const login=(params)=>http.get("api/course",params)

//file : src/api/http/index.js
import {login} from './login'

export default {
    login
}

//file : src/api/index.js
import api from './http'
const install=(vue)=>{
    if(install.installed){
        return;
    }
    vue.prototype.$api=api;

}
export default install

// file : main.js
import api from 'api/index'
Vue.use(api);