1）修改vue.config.js文件

'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')function resolve(dir) {return path.join(__dirname, dir)
}const name = defaultSettings.title || 'vue Element Admin' // page title// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following method:
// port = 9527 npm run dev OR npm run dev --port = 9527
const port = process.env.port || process.env.npm_config_port || 9527 // dev port// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {/*** You will need to set publicPath if you plan to deploy your site under a sub path,* for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,* then publicPath should be set to "/bar/".* In most cases please use '/' !!!* Detail: https://cli.vuejs.org/config/#publicpath*/publicPath: '/',outputDir: 'dist',assetsDir: 'static',lintOnSave: process.env.NODE_ENV === 'development',productionSourceMap: false,devServer: {port: port,open: true,overlay: {warnings: false,errors: true},before: require('./mock/mock-server.js')},configureWebpack: {// provide the app's title in webpack's name field, so that// it can be accessed in index.html to inject the correct title.name: name,resolve: {alias: {'@': resolve('src')}}},chainWebpack(config) {// it can improve the speed of the first screen, it is recommended to turn on preload// it can improve the speed of the first screen, it is recommended to turn on preloadconfig.plugin('preload').tap(() => [{rel: 'preload',// to ignore runtime.js// https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],include: 'initial'}])// when there are many pages, it will cause too many meaningless requestsconfig.plugins.delete('prefetch')// set svg-sprite-loaderconfig.module.rule('svg').exclude.add(resolve('src/icons')).end()config.module.rule('icons').test(/\.svg$/).include.add(resolve('src/icons')).end().use('svg-sprite-loader').loader('svg-sprite-loader').options({symbolId: 'icon-[name]'}).end()config.when(process.env.NODE_ENV !== 'development',config => {config.plugin('ScriptExtHtmlWebpackPlugin').after('html').use('script-ext-html-webpack-plugin', [{// `runtime` must same as runtimeChunk name. default is `runtime`inline: /runtime\..*\.js$/}]).end()config.optimization.splitChunks({chunks: 'all',cacheGroups: {libs: {name: 'chunk-libs',test: /[\\/]node_modules[\\/]/,priority: 10,chunks: 'initial' // only package third parties that are initially dependent},elementUI: {name: 'chunk-elementUI', // split elementUI into a single packagepriority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or apptest: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm},commons: {name: 'chunk-commons',test: resolve('src/components'), // can customize your rulesminChunks: 3, //  minimum common numberpriority: 5,reuseExistingChunk: true}}})// https:// webpack.js.org/configuration/optimization/#optimizationruntimechunkconfig.optimization.runtimeChunk('single')})}
}

在vue.config.js文件中找到devServer,修改devServer的值

 注释掉 before: require('./mock/mock-server.js')

在下面添加一下代理信息

        # src/vue.config.js ，http://127.0.0.1:8000为后台接口的目标地址proxy: {[process.env.VUE_APP_BASE_API]: {target: `http://127.0.0.1:8000`,changeOrigin: true,pathRewrite: {["^" + process.env.VUE_APP_BASE_API]: ""}}},

2）修改src/main.js文件

在main.js文件中注释掉mock配置

#在src/main.js文件中注释掉mock配置
if (process.env.NODE_ENV === 'production') {const {mockXHR} = require('../mock')mockXHR()
}

注释 

/* if (process.env.NODE_ENV === 'production') {const {mockXHR} = require('../mock')mockXHR()
} */

替换src/api文件夹下接口中的地址，把mock模拟地址换成真实地址

export function login(data) {return request({// url: '/vue-element-admin/user/login', // mock地址url: '/admin/passport/login',method: 'post',data})
}

其他接口地址修改同上