前言：

跨域方案有很多种，既然我们用到了Vue，那么就使用vue提供的跨域方案。

解决方案：

1.修改HttpRequestUtil.js

 import axios from 'axios' export var baseurl = '/api'
 /**
  * Get请求
  */
 export function get(url, callback){
     console.log('测试get请求')
     axios.get(baseurl+url)
     .then(function (response) {
         console.log(response)
         callback(response.data,true)
     })
     .catch(function (error) {
         console.log(error)
         callback(null,false)
     })
 } export default {
     get
 }

2.修改index.js

 'use strict'
 // Template version: 1.3.1
 // see http://vuejs-templates.github.io/webpack for documentation. const path = require('path') module.exports = {
   dev: {     // Paths
     assetsSubDirectory: 'static',
     assetsPublicPath: '/',
     proxyTable: {
       '/api': {
         target: 'http://127.0.0.1:8088',//设置你调用的接口域名和端口号 别忘了加http
         changeOrigin: true,
         pathRewrite: {
           '^/api': 'http://127.0.0.1:8088'//这里理解成用‘/api’代替target里面的地址，后面组件中我们掉接口时直接用api代替 比如我要调用'http://40.00.100.100:3002/user/add'，直接写‘/api/user/add’即可
         }
       }
     },     // Various Dev Server settings
     host: 'localhost', // can be overwritten by process.env.HOST
     port: 8090, // can be overwritten by process.env.PORT, 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-     /**
      * Source Maps
      */     // https://webpack.js.org/configuration/devtool/#development
     devtool: 'cheap-module-eval-source-map',     // If you have problems debugging vue-files in devtools,
     // set this to false - it *may* help
     // https://vue-loader.vuejs.org/en/options.html#cachebusting
     cacheBusting: true,     cssSourceMap: true
   },   build: {
     // Template for index.html
     index: path.resolve(__dirname, '../dist/index.html'),     // Paths
     assetsRoot: path.resolve(__dirname, '../dist'),
     assetsSubDirectory: 'static',
     assetsPublicPath: '/',     /**
      * Source Maps
      */     productionSourceMap: true,
     // https://webpack.js.org/configuration/devtool/#production
     devtool: '#source-map',     // Gzip off by default as many popular static hosts such as
     // Surge or Netlify already gzip all static assets for you.
     // Before setting to `true`, make sure to:
     // npm install --save-dev compression-webpack-plugin
     productionGzip: false,
     productionGzipExtensions: ['js', 'css'],     // Run the build command with an extra argument to
     // View the bundle analyzer report after build finishes:
     // `npm run build --report`
     // Set to `true` or `false` to always turn it on or of
     bundleAnalyzerReport: process.env.npm_config_report
   }
 }