vue mock数据（模拟后台）
本文转载自：https://blog.csdn.net/benben513624/article/details/78562529
vue实现ajax获取后台数据是通过vue-resource，首先通过npm安装vue-resource
npm install vue-resource --save
安装完成以后，把vue-resource引入到main.js文件中
src/main.js
// 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'
import VueResource from 'vue-resource'
import Layout from './components/layout'
Vue.use(VueResource);
/* eslint-disable no-new */
new Vue({
el: '#app',
router,
template: '<Layout/>',
components: { Layout }
})
把vue-resource引入项目以后，就可以在任何组件里面直接用了
<template><div class="index-wrap">
<div class="index-left">
<div class="index-left-block lastest-news">
<h2>最新消息</h2>
<ul>
<li v-for="news in newsList">
<a :href="news.url" class="new-item">{{news.title}}</a>
</li>
</ul>
</div>
</div>
<div class="index-right">
</div>
</div>
</template>
<script type="text/ecmascript-6">
export default{
created(){
this.$http.get('api/getNewsList').then((res)=>{ //可用post请求，this.$http.post('api/getNewsList',{'userId':123})
console.log(res.data);
this.newsList=res.data;
console.log( this.newsList);
},(err)=>{
console.log(err);
});
},
data(){
return {
newsList:[],
}
}
}
</script>
<style scoped>
.index-wrap{
width: 1200px;
margin: 0 auto;
overflow: hidden;
background: blue;
}
.index-left{
float: left;
width: 300px;
text-align: left;
background: red;
}
.index-right {
float: left;
width: 900px;
}
.index-left-block{
margin: 15px;
background: #fff;
box-shadow: 0 0 1px #ddd;
}
.index-left-block .hr {
margin-bottom: 20px;
border-bottom: 1px solid #ddd;
}
.index-left-block h2 {
background: #4fc08d;
color: #fff;
padding: 10px 15px;
margin-bottom: 20px;
}
.index-left-block h3 {
padding: 0 15px 5px 15px;
font-weight: bold;
color: #222;
}
.index-left-block ul {
padding: 10px 15px;
}
.index-left-block li {
padding: 5px;
}
.hot-tag{
background: red;
color:#fff;
font-size: 10px;
border-radius: 10px;
}
</style>
上面这个就是用vue-resource来进行数据请求的大体流程，作为前端，在开发的过程，遇到这种调用后端接口调试起来还是很麻烦的，我们要找后端的一个服务器，然后关联起来 ，或者把前端代码放上去，这样都是挺麻烦的，解决的办法就是前端放mock data，主要有两种方式：
（1）json-server模拟数据
使用json-server这个工具，可以虚构出后端接口对应的数据，然后在项目里发送特定的请求，就可以发请求拿到模拟的数据，首先npm安装
npm install json-server --save
然后在build/webpack.dev.conf.js中进行配置，参考json-server
'use strict'const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
const portfinder = require('portfinder')
const devWebpackConfig = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
},
// cheap-module-eval-source-map is faster for development
devtool: config.dev.devtool,
// these devServer options should be customized in /config/index.js
devServer: {
clientLogLevel: 'warning',
historyApiFallback: true,
hot: true,
host: process.env.HOST || config.dev.host,
port: process.env.PORT || config.dev.port,
open: config.dev.autoOpenBrowser,
overlay: config.dev.errorOverlay ? {
warnings: false,
errors: true,
} : false,
publicPath: config.dev.assetsPublicPath,
proxy: config.dev.proxyTable,
quiet: true, // necessary for FriendlyErrorsPlugin
watchOptions: {
poll: config.dev.poll,
}
},
plugins: [
new webpack.DefinePlugin({
'process.env': require('../config/dev.env')
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
new webpack.NoEmitOnErrorsPlugin(),
// https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: 'index.html',
template: 'index.html',
inject: true
}),
]
})
//这里是json-server配置信息
// json-server.js
const jsonServer = require('json-server')
const apiServer = jsonServer.create()
const apiRouter = jsonServer.router('db.json') //数据关联server，db.json与index.html同级
const middlewares = jsonServer.defaults()
apiServer.use(middlewares)
apiServer.use('/api',apiRouter)
apiServer.listen(3000, () => { //监听端口
console.log('JSON Server is running')
})
module.exports = new Promise((resolve, reject) => {
portfinder.basePort = process.env.PORT || config.dev.port
portfinder.getPort((err, port) => {
if (err) {
reject(err)
} else {
// publish the new Port, necessary for e2e tests
process.env.PORT = port
// add port to devServer config
devWebpackConfig.devServer.port = port
// Add FriendlyErrorsPlugin
devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
compilationSuccessInfo: {
messages: [`Your application is running here: http://${config.dev.host}:${port}`],
},
onErrors: config.dev.notifyOnErrors
? utils.createNotifierCallback()
: undefined
}))
resolve(devWebpackConfig)
}
})
})
配置完成以后，npm run dev 启动，浏览器输入localhost:3000，出现如下图，说明配置成功
那么现在还有一个问题，我们代码的服务端接口是8080，json-server的服务端端口是3000，由于浏览器的同源策略问题，这样请求会存在一个跨域问题，所以这里要做一个服务端代理的配置，配置build/index.js中的proxyTable:
host: 'localhost', // can be overwritten by process.env.HOSTport: 8080, // can be overwritten by process.env.HOST, if port is in use, a free one will be determined
autoOpenBrowser: false,
errorOverlay: true,
notifyOnErrors: true,
poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-
proxyTable:{
'/api/':'http://localhost:3000/'
},
这样就可以在localhost:8080下访问接口了
（2）express启动数据服务
在实际开发中，发现json-server只能用于get请求，不能进行post请求，在网上找的另外一种方法，express既能用于get请求，又能用于post请求，下面说一下express启动服务的配置方法：
'use strict'const utils = require('./utils')
const webpack = require('webpack')
var express = require('express')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
const portfinder = require('portfinder')
const devWebpackConfig = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
},
// cheap-module-eval-source-map is faster for development
devtool: config.dev.devtool,
// these devServer options should be customized in /config/index.js
devServer: {
clientLogLevel: 'warning',
historyApiFallback: true,
hot: true,
host: process.env.HOST || config.dev.host,
port: process.env.PORT || config.dev.port,
open: config.dev.autoOpenBrowser,
overlay: config.dev.errorOverlay ? {
warnings: false,
errors: true,
} : false,
publicPath: config.dev.assetsPublicPath,
proxy: config.dev.proxyTable,
quiet: true, // necessary for FriendlyErrorsPlugin
watchOptions: {
poll: config.dev.poll,
}
},
plugins: [
new webpack.DefinePlugin({
'process.env': require('../config/dev.env')
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
new webpack.NoEmitOnErrorsPlugin(),
// https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: 'index.html',
template: 'index.html',
inject: true
}),
]
})
// json-server.js
//const jsonServer = require('json-server')
//const apiServer = jsonServer.create()
//const apiRouter = jsonServer.router('db.json')
//const middlewares = jsonServer.defaults()
//
//apiServer.use(middlewares)
//apiServer.use('/api',apiRouter)
//apiServer.listen(3000, () => {
// console.log('JSON Server is running')
//})
//express 配置server
var apiServer = express()
var bodyParser = require('body-parser')
apiServer.use(bodyParser.urlencoded({ extended: true }))
apiServer.use(bodyParser.json())
var apiRouter = express.Router()
var fs = require('fs')
apiRouter.route('/:apiName') //接口路径
.all(function (req, res) {
fs.readFile('./db.json', 'utf8', function (err, data) { //读取接口文件
if (err) throw err
var data = JSON.parse(data)
if (data[req.params.apiName]) {
res.json(data[req.params.apiName])
}
else {
res.send('no such api name')
}
})
})
apiServer.use('/api', apiRouter);
apiServer.listen(3000, function (err) {
if (err) {
console.log(err)
return
}
console.log('Listening at http://localhost:' + 3000 + '\n')
})
module.exports = new Promise((resolve, reject) => {
portfinder.basePort = process.env.PORT || config.dev.port
portfinder.getPort((err, port) => {
if (err) {
reject(err)
} else {
// publish the new Port, necessary for e2e tests
process.env.PORT = port
// add port to devServer config
devWebpackConfig.devServer.port = port
// Add FriendlyErrorsPlugin
devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
compilationSuccessInfo: {
messages: [`Your application is running here: http://${config.dev.host}:${port}`],
},
onErrors: config.dev.notifyOnErrors
? utils.createNotifierCallback()
: undefined
}))
resolve(devWebpackConfig)
}
})
})
在浏览器中输入接口地址，如下：
以上是 vue mock数据（模拟后台） 的全部内容， 来源链接： utcz.com/z/377387.html
