vue+mockjs 模擬數據,實現先後端分離開發

在項目中嘗試了mockjs,mock數據,實現先後端分離開發。前端

關於mockjs,官網描述的是vue

1.先後端分離webpack

2.不須要修改既有代碼,就能夠攔截 Ajax 請求,返回模擬的響應數據。ios

3.數據類型豐富git

4.經過隨機數據,模擬各類場景。github

等等優勢。web

總結起來就是在後端接口沒有開發完成以前,前端能夠用已有的接口文檔,在真實的請求上攔截ajax,並根據mockjs的mock數據的規則,模擬真實接口返回的數據,並將隨機的模擬數據返回參與相應的數據交互處理,這樣真正實現了先後臺的分離開發。ajax

與以往的本身模擬的假數據不一樣,mockjs能夠帶給咱們的是:在後臺接口未開發完成以前模擬數據,並返回,完成前臺的交互;在後臺數據完成以後,你所作的只是去掉mockjs:中止攔截真實的ajax,僅此而已。vue-cli

下面一步步的來實現vue-cli建立項目並添加一條新聞類的數據模擬接口:npm

1.安裝vue-cli全局腳手架

npm install --global vue-cli

2.建立vue項目

vue init webpack mockjs
cd mockjs
npm install axios --save

3.安裝mockjs

npm install mockjs --save-dev

4.項目目錄

axios/api    用來封裝axios

Hello.vue     頁面首頁

NeswCell.vue   新聞組件

router/index.js   路由

main.js      入口js

mock.js     mockjs文件

在來看下完成後的效果

 

5.在入口js(main.js)裏引入mockjs

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'

Vue.config.productionTip = false

// 引入mockjs
require('./mock.js')

/* eslint-disable no-new */
new Vue({
	el: '#app',
	router,
	template: '<App/>',
	components: {
		App
	}
})

Vue.filter('getYMD', function(input) {
	return input.split(' ')[0];
})

這裏我添加了額一個經常使用的時間整理過濾器 getYMD

6. 添加一個mock規則(mock.js)

// 引入mockjs
const Mock = require('mockjs');
// 獲取 mock.Random 對象
const Random = Mock.Random;
// mock一組數據
const produceNewsData = function() {
	let articles = [];
	for (let i = 0; i < 100; i++) {
		let newArticleObject = {
			title: Random.csentence(5, 30), //  Random.csentence( min, max )
			thumbnail_pic_s: Random.dataImage('300x250', 'mock的圖片'), // Random.dataImage( size, text ) 生成一段隨機的 Base64 圖片編碼
			author_name: Random.cname(), // Random.cname() 隨機生成一個常見的中文姓名
			date: Random.date() + ' ' + Random.time() // Random.date()指示生成的日期字符串的格式,默認爲yyyy-MM-dd;Random.time() 返回一個隨機的時間字符串
		}
		articles.push(newArticleObject)
	}

	return {
		articles: articles
	}
}

// Mock.mock( url, post/get , 返回的數據);
Mock.mock('/news/index', 'post', produceNewsData);

7.在Hello.vue 中請求文檔接口,並接收mock數據

<template>
  <div class="index">
    <div v-for="(item, key) in newsListShow">
      <news-cell
      :newsDate="item"
      :key="key"
      ></news-cell>
    </div>
  </div>
</template>

<script>
import api from './../axios/api.js'
import NewsCell from './NewsCell.vue'

export default {
  name: 'index',
  data () {
    return {
      newsListShow: [],
    }
  },
  components: {
    NewsCell
  },
  created() {
    this.setNewsApi();
  },
  methods:{
    setNewsApi: function() {
      api.JH_news('/news/index', 'type=top&key=123456')
      .then(res => {
        console.log(res);
        this.newsListShow = res.articles;
      });
    },
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.topNav{
  width: 100%;
  background: #ED4040;
  position: fixed;
  top:0rem;
  left: 0;
  z-index: 10;
}
.simpleNav{
  width: 100%;
  line-height: 1rem;
  overflow: hidden;
  overflow-x: auto;
  text-align: center;
  font-size: 0;
  font-family: '微軟雅黑';
  white-space: nowrap;
}
.simpleNav::-webkit-scrollbar{height:0px}
.simpleNavBar{
  display: inline-block;
  width: 1.2rem;
  color:#fff;
  font-size:0.3rem;
}
.navActive{
  color: #000;
  border-bottom: 0.05rem solid #000;
}
.placeholder{
  width:100%;
  height: 1rem;
}
</style>

 注意:api.JH_news是我封裝的axios函數

axios/api.js以下

import axios from 'axios'
import vue from 'vue'

axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded'

// 請求攔截器
axios.interceptors.request.use(function(config) {
    return config;
  }, function(error) {
    return Promise.reject(error);
  })
  // 響應攔截器
axios.interceptors.response.use(function(response) {
  return response;
}, function(error) {
  return Promise.reject(error);
})

// 封裝axios的post請求
export function fetch(url, params) {
  return new Promise((resolve, reject) => {
    axios.post(url, params)
      .then(response => {
        resolve(response.data);
      })
      .catch((error) => {
        reject(error);
      })
  })
}

export default {
  JH_news(url, params) {
    return fetch(url, params);
  }
}

8.在NewsCell.vue展現數據

<template>
  <section class="financial-list">
    <section class="collect" @click="jumpPage">
      <aside>
        <h2>{{newsDate.title}}</h2>
        <section class="Cleft clearfix">
          <img class="fl" src="./../assets/icon/eyes.png" style="width:0.24rem;height:0.2rem;">
          <span class="fl">{{newsDate.author_name}}</span>
        </section>
        <section class="Cright">
          <img src="./../assets/icon/clock.png" style="width:0.2rem;height:0.2rem;">
          <span>{{newsDate.date | getYMD}}</span>
        </section>
        <div style="clear: both"></div>
      </aside>
      <aside>
        <img :src="newsDate.thumbnail_pic_s" style="border-radius: 0.2rem;">
      </aside>
      <div style="clear: both"></div>
    </section>
  </section>
</template>

<script>
export default {
  name: 'NewsCell',
  props: {
    newsDate: Object
  },
  data () {
    return {
    }
  },
  computed: {
  },
  methods: {
    jumpPage: function () {
      window.location.href = this.newsDate.url
    }
  }
}
</script>

<style scoped>
.financial-list {
  width: 100%;
  height: 100%;
  background-color: white;
  padding: 0.28rem 0;
  border-bottom: 1px solid #ccc;
}

.financial-list .collect {
  width: 92%;
  margin: 0 auto;
}

.financial-list .collect aside:nth-of-type(1) {
  width: 63%;
  float: left;
}

.financial-list .collect aside:nth-of-type(2) {
  width: 32%;
  height: 2rem;
  float: left;
  margin-left: 0.3rem;
}

.financial-list .collect h2 {
  width: 100%;
  height: 0.96rem;
  font-size: 0.32rem;
  color: #333333;
  line-height: 0.48rem;
  text-overflow: ellipsis;
  -o-text-overflow: ellipsis;
  overflow: hidden;
}

.financial-list .collect aside:nth-of-type(2) img {
  width: 100%;
  height: 100%;
}

.financial-list .collect aside .Cleft {
  width: 45%;
  float: left;
  margin-top: 0.66rem;
}

.financial-list .collect aside .Cleft span{
  display: block;
  width: 1.4rem;
  margin-left: 0.05rem;
  white-space: nowrap;
  text-overflow: ellipsis;
  -o-text-overflow: ellipsis;
  overflow: hidden;
}

.financial-list .collect aside .Cright {
  width: 55%;
  float: right;
  margin-top: 0.66rem;
}
.financial-list .collect aside .Cright span{
  display: inline-block;
  margin: 0.04rem 0 0 0.05rem;
}
.financial-list .collect aside span {
  font-size: 0.2rem;
  color: #999999;
}

.financial-list .collect aside .Cleft img,
.financial-list .collect aside .Cright img {
  width: 0.18rem;
  height: 0.24rem;
  margin-top: 0.09rem;
}
</style>

  完成

9.全部代碼能夠查看個人github:  https://github.com/Jasonwang911/vue_mockjs

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