vue 请求后端数据的示例代码

/*引入axios*/
import axios from 'axios'
const request = axios.create({
    baseURL: 'http://localhost:8280/user', // 基础路径,将统一的部分全部封装
    withCredentials: true // 表示请求可以携带cookie
})
//前端采用export.default，在写后端代码时用module.export
export default request

<script>
import request from './utils/request'
 
export default {
  created() {
    request({
      method:'GET',
      url:'/products',
      params:{test:'111',hello:'world'},
    })
  },
}
</script>

import request from '../utils/request';
 
export function getList(params={}) {
    return request({
        methods:'GET',
        url:'/products',
        params,
    })
}
 
export function getProduct(id) {
    return request({
        methods:'GET',
        url:'/products/${id}',
    })
}
export function update(id,data) {
    return request({
        methods:'PUT',
        url:'/products/${id}',
        data,
    })
}

import products from './products';
 
export default{
    products,
}

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

getProducts(){
    this.$api.products.getList(this.query).then((response)=>{
        this.products = response.data.data
        this.total = response.data.total
    })
}

import Vue from 'vue'
import App from './App'
import router from './router'
import axios from 'axios';
 
//Vue.prototype.$http=axios;//修改内部的$http为axios  $http.get("") .post()
 
Vue.config.productionTip = false
 
/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>',
  render:h => h(App),
  beforeCreate() {
    //安装全局事件总线，$bus就是当前应用的vm
    Vue.prototype.$bus = this
  },
 
})

<template>
  <div>
    <Search/>
    <List/>
  </div>
</template>
 
<script>
import List from "./components/List";
import Search from "./components/Search";
export default {
  name: 'App',
  components: {Search, List},
}
</script>
 
<style>
 
</style>

import Vue from 'vue'
import Router from 'vue-router'
 
Vue.use(Router)
 
export default new Router({
  routes: [
 
  ]
})

<template>
  <div class="row">
    <!--展示用户数据-->
    <div class="card" v-show="info.users.length" v-for="user in info.users" :key="user.login">
      <a :href="user.html_url" target="_blank">
        <img :src="user.avatar_url" style="width: 100px"/>
      </a>
      <p class="card-text">{{user.login}}</p>
    </div>
    <!--展示欢迎词-->
    <h1 v-show="info.isFirst">欢迎使用</h1>
    <!--展示加载中-->
    <h1 v-show="info.isLoading">加载中....</h1>
    <!--展示错误信息-->
    <h1 v-show="info.errMsg">{{info.errMsg}}</h1>
  </div>
</template>
 
<script>
export default {
  name: "List",
  data(){
    return{
     info:{
       isFirst:true,//是否是初次展示
       isLoading:false,//是否处于加载中
       errMsg:'',
       users:[],
     }
    }
  },
  //使用全局事件总线在两个组件之间传递数据
  //接收数据：list组件想接收数据，则要在list组件中给$bus绑定自定义事件，事件的回调留在list组件自身。
  mounted() {
    this.$bus.$on('updateListDate',(dataObj)=>{
      console.log(dataObj)
      this.info = {...this.info,...dataObj};
      /*this.isFirst = isFirst
      this.isLoading = isLoading
      this.errMsg = errMsg
      this.users = users*/
    })
  },
}
</script>
 
<style scoped>
 
</style>

<template>
  <section class="jumbotron">
    <h3 class="jumbotron-heading"> search gitHub Users</h3>
    <div>
      <input type="text" placeholder="enter the name you search" v-model="keyWord"/>&nbsp;
      <button @click="searchUsers" >Search</button>
    </div>
  </section>
</template>
<script>
import axios from 'axios';
export default {
  name: "Search",
  data(){
    return{
      keyWord:''
    }
  },
  methods:{
    searchUsers(){
      //请求前更新list里面的数据
      this.$bus.$emit('updateListDate',{isFirst:false,isLoading:true,errMsg:'',users:[]})
      axios.get(`https://api.github.com/search/users?q=${this.keyWord}`).then(
        res =>{
          console.log("请求成功")
          //提供数据：search组件要给list组件传递数据，就要触发list组件中的自定义事件并携带要传递的数据
          //请求成功后更新list里面的数据
          this.$bus.$emit("updateListDate",{isLoading:false,errMsg:'',users:res.data.items})
        },
        error =>{
          console.log("请求成功",error.message)
          //请求失败后更新list里面的数据
          this.$bus.$emit("updateListDate",{isLoading:false,errMsg:error.message,users:[]})
        }
      )
    }
  },
}
</script>
 
<style scoped>
 
</style>