第一步：找到 .env.development文件做如下修改

# just a flag
ENV = 'development'

# base api
VUE_APP_BASE_API = 'api'

第二步：找到 ：vue.config.js,配置跨域，关闭mock，必须做！！！

target换成自己的后端地址

//配置跨域    
proxy: { 
      '/api': {
        target: 'http://118.31.228.113:5730/',
        ws: true,
        changeOrigin: true,//允许跨域
        pathRewrite: {
          '^/api': ''   //请求的时候使用这个api就可以
        }
      }
    },
    //这行把mock禁用
    // before: require('./mock/mock-server.js')

第三步：在这个文件里面，把响应状态码20000改成200（前后端自己约定）

注意：做完这些其实就可以登录了，修改接口在api文件里面，如果要修改登录接口和获取信息接口，

接下来做前端权限管理，路由过滤：

首先在store下面的modules下面新建文件permission.js

复制到里面

import { asyncRoutes, constantRoutes } from '@/router'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {

  if (route.meta && route.meta.role) {
    return roles.some(role => route.meta.role.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })
  return res;
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      let accessedRoutes

      if (roles.includes('ADMIN')) {
      //路由是否有admin,有直接全部显示
        accessedRoutes = asyncRoutes || []
      } else {
      //accessedRoutes这个就是当前角色可见的动态路由
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

 然后修改store下面的index.js和getters.js

index.js:

import Vue from 'vue'
import Vuex from 'vuex'
import getters from './getters'
import app from './modules/app'
import settings from './modules/settings'
import user from './modules/user'
//这里
import permission from './modules/permission'

Vue.use(Vuex)

const store = new Vuex.Store({
  modules: {
    app,
    settings,
    user,
//这里
    permission
  },
  getters
})

export default store

 getters.js:

const getters = {
  sidebar: state => state.app.sidebar,
  device: state => state.app.device,
  token: state => state.user.token,
  avatar: state => state.user.avatar,
  name: state => state.user.name,
  permission_routes: state=>state.permission.routes,
}
export default getters

然后找到和main平级的 permission.js

修改为如下，就修改了tey{}里面的内容

import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          //从请求中获取到角色
          const val = await store.dispatch('user/getInfo')
          console.log(val.roles)
          // 把当前登录用户信息放到sessionStorage
          sessionStorage.setItem("roles", JSON.stringify(val) );
          
          //这里从permission/generateRoutes拿到路由
          const accessRoutes = await store.dispatch('permission/generateRoutes', val.roles)
         
          next()
           //刷新路由
           router.options.routes = store.getters.permission_routes
           // dynamically add accessible routes
           router.addRoutes(accessRoutes)
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})

然后就是添加异步路由了,，router下面的index.js添加asyncRoutes ，和constantRoutes平级

export const asyncRoutes = [
  {
    path: 'external-link',
    component: Layout,
    children: [
      {
        path: 'https://panjiachen.github.io/vue-element-admin-site/#/',
        //重点：role
        meta: { title: 'External Link', icon: 'link', role: ['admin'] },
      }
    ]
  },
]

这就大功告成了，不懂得可以留言，一 一回复