Vue（二十一）使用express模拟接口数据

1.下载express

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2.使用vue-cli下载好项目文件

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3.找到文件 build - webpack.dev.conf.js

'use strict'
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const path = require('path')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
const portfinder = require('portfinder')

const HOST = process.env.HOST
const PORT = process.env.PORT && Number(process.env.PORT)

/**
 * 使用express框架启动一个服务器
 */
var express = require('express')
var app = express()
//1.读取数据
var appData=require('../static/json/table.json');
var businessNum=appData.businessNum;
var recruitingNum=appData.businessNum;
var customerData=appData.businessNum;

//2.使用expresss配置路由，指定接口请求
var apiRoutes=express.Router(); //定义一个路由


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: {
      rewrites: [
        { from: /.*/, to: path.posix.join(config.dev.assetsPublicPath, 'index.html') },
      ],
    },
    hot: true,
    contentBase: false, // since we use CopyWebpackPlugin.
    compress: true,
    host: HOST || config.dev.host,
    port: 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,
    },
    before(apiRoutes) {
      apiRoutes.get('/api/businessNum', (req, res) => {
        res.json({
          // 这里是你的json内容
          errno: 0,
          data: businessNum
        })
      });
      apiRoutes.get('/api/recruitingNum', (req, res) => {
        res.json({
          // 这里是你的json内容
          errno: 0,
          data: recruitingNum
        })
      });
      apiRoutes.get('/api/customerData', (req, res) => {
        res.json({
          // 这里是你的json内容
          errno: 0,
          data: customerData
        })
      })
    }
  },
  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
    }),
    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.dev.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
})

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://${devWebpackConfig.devServer.host}:${port}`],
        },
        onErrors: config.dev.notifyOnErrors
        ? utils.createNotifierCallback()
        : undefined
      }))

      resolve(devWebpackConfig)
    }
  })
})

4.在页面中发送axios请求（先在main.js中引入axios）

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import axios from 'axios'
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/* 全局引入axios */
Vue.prototype.$http = axios

5.在页面中请求数据

　　created () {
        this.$http.get('/api/businessNum').then(response => {
            console.log(response)
        }).catch(response => {
            console.log(response)
        })
    }

6.页面加载返回数据信息