Element-UI整合权限动态路由过程

一、路由目录/router/index.vue‘

文件里面主要有俩个部分

export const constantRoutes = [ 静态
export const asyncRoutes = [ 动态

想要根据权限不同显示目录不同，就需要在asyncRoutes里配置 roles: ['admin', 'instr'] （权限名字自己起）

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

/* Layout */
import Layout from '@/layout'

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/guide/essentials/router-and-nav.html
 *
 * hidden: true                   if set true, item will not show in the sidebar(default is false)
 * alwaysShow: true               if set true, will always show the root menu
 *                                if not set alwaysShow, when item has more than one children route,
 *                                it will becomes nested mode, otherwise not show the root menu
 * redirect: noRedirect           if set noRedirect will no redirect in the breadcrumb
 * name:'router-name'             the name is used by <keep-alive> (must set!!!)
 * meta : {
    roles: ['admin','editor']    control the page roles (you can set multiple roles)
    title: 'title'               the name show in sidebar and breadcrumb (recommend set)
    icon: 'svg-name'/'el-icon-x' the icon show in the sidebar
    breadcrumb: false            if set false, the item will hidden in breadcrumb(default is true)
    activeMenu: '/example/list'  if set path, the sidebar will highlight the path you set
  }
 */

/**
 * constantRoutes
 * a base page that does not have permission requirements
 * all roles can be accessed
 */
export const constantRoutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/404',
    component: () => import('@/views/404'),
    hidden: true
  },
  {
    path: '/',
    component: Layout,
    redirect: '/tongzhi',
    meta: {
      title: '学校通知', icon: 'el-icon-s-custom',
    },
    children: [{
      path: 'tongzhi',
      name: '通知',
      component: () => import('@/views/tongzhi/tongzhi'),
      meta: { title: '通知', icon: 'dashboard' }
    },
    {
        path: 'tongzhi1',
        name: '通知1',
        component: () => import('@/views/tongzhi/tongzhi'),
        meta: { title: '通知1', icon: 'dashboard' }
      },
  ]
  }
];
export const asyncRoutes = [
  // 个人信息
  {
    path: '/user',
    component: Layout,
    // redirect: '/user/show',  //默认路由
    name: '信息管理',
    meta: {
      title: '信息管理', icon: 'el-icon-s-custom',
      roles: ['admin', 'instr']
    },
    children: [
      {
        path: 'show',
        name: '个人信息',

        //转到页面
        component: () => import('@/views/user/show'),
        meta: {
          title: '个人信息', icon: 'el-icon-s-custom'
          ,roles: ['admin']
        }
      },
       {
        path: 'show1',
        name: '个人信息1',

        //转到页面
        component: () => import('@/views/user/show1'),
        meta: {
          title: '个人信息1', icon: 'el-icon-s-custom',
          roles: ['instr']
        }
      },
      {
        path: 'show2',
        name: '个人信息2',

        //转到页面
        component: () => import('@/views/user/show2'),
        meta: {
          title: '个人信息2', icon: 'el-icon-s-custom',
          roles: ['instr']
        }
      },
    ]
  },
  { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  // mode: 'history', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
});
const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}





export default router

二、从后台获取权限

我的解决方案是前台登录发出请求后，后台返回token，里面带有权限信息。然后前台想后台发送请求获取info，权限为列表返回

具体后台登录和获取info可以参考文章开头第一个链接的security_5010的Module，详细兄弟们不会嫌弃我写的乱的哈哈哈

在这里主要说说前台如何获取权限信息

1.登录

/view/login/index.vue

    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {

          console.log(this.loginForm.username)
          console.log(this.loginForm.password)
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }

调用store/modules/user.js

const actions = {
  // user login
  login({ commit }, userInfo) {
    const { username, password } = userInfo
    return new Promise((resolve, reject) => {
      login({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        commit('SET_TOKEN', data.token)
        setToken(data.token)
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

调用/api/sys/user.js

import request from '@/utils/request'

export function login(username,password) {
  return request({
    url: '/sec/log/logins',
    method: 'post',
    data:{
      username,
      password
    }
  })
}

export function getInfo(token) {
  return request({
    url: '/sec/log/info',
    method: 'get',
    params: { token }
  })
}

export function logout() {
  return request({
    url: '/sec/log/logout',
    method: 'post'
  })
}

向后台发送登录请求，参数为username，password

    @PostMapping("logins")
    public R login(@RequestBody Map<String, Object> map){
        System.out.println("user = " + map.toString());
        Object users = new Object();
        for (Map.Entry<String, Object> entry:map.entrySet()){
            users = entry.getValue();
        }
        JSONObject jsonObject=JSONObject.fromObject(users); // 将数据转成json字符串
        User per = (User) JSONObject.toBean(jsonObject, User.class); //将json转成需要的对象
        System.out.println("per = " + per);
        String token = bkStaffService.login(per);
        System.out.println("token = " + token);
        R r = R.ok();
        if(token.equals("")){
            return R.error();
        }
        r.data("token",token);
        return r;
    }

后台接收请求，这里有一个细节，vue传回的是map，要把数据在转成entry，然后转成json，然后再把json转成user对象。否则数据取不出来（可能是我理解的问题）

然后service进行逻辑处理，返回给controller层一个token串，然后传给前端。

然后进行src/permission.js

const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasRoles = store.getters.roles && store.getters.roles.length > 0
      if (hasRoles) {
        next()
      } else {
        try {
          // get user info
          const { roles } = await store.dispatch('user/getInfo')

          const accessRoutes = await store.dispatch('permission/generateRoutes', roles)

          router.addRoutes(accessRoutes)
          // console.log(" store.getters.roles "+store.getters.roles)
          // console.log(" store.getters.routers "+store.getters.routes[0].path)
          // console.log(" store.getters.routers " + store.getters.routes[1].path)
          // console.log(" store.getters.routers " + store.getters.routes[2].path)
          // console.log(" store.getters.routers " + store.getters.routes[3].path)
          // console.log(" store.getters.routers " + store.getters.routes[4].path)
          // router.options.routes=store.getters.routers
          next({ ...to,replace: true})
          
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          // Message.error(error || 'Has Error')
          Message.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()
    }
  }
})

调用generateRoutes方法 /store/modules/permission.js

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

function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    console.log("进入hasPermission if route" + route + " roles: " + roles)
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    console.log("进入hasPermission else route" + route + " roles: " + roles)
    return true
  }
}

export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    console.log("进入循环routes：" + routes + " roles:" + roles)
    if (hasPermission(roles, tmp)) {
      console.log("进入循环hasPermission")
      if (tmp.children) {
        console.log("进入循环tmp.children")
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })
  console.log("res：" + res)
  return res
}

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

const mutations = {
  SET_ROUTES: (state, routes) => {
    console.log("进入SET_ROUTES: routes " + routes + " state: " + state)
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
    console.log("routes:" + state.routes + " " + state.addRoutes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      console.log("进入generateRoutes:" + roles)
      let accessedRoutes
      if (roles.includes('admin')) {
        accessedRoutes = asyncRoutes || []
        console.log("进入判断admin if:" + roles)
      } else {
        console.log("进入判断admin else:" + roles[0]+roles)
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      console.log("accessedRoutes:"+accessedRoutes)
      resolve(accessedRoutes)
    })
  }
}

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

向后台发送getInfo请求，获取信息。store/modules/user.js

const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_INTRODUCTION: (state, introduction) => {
    state.introduction = introduction
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles
  }
}
  
getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const { data } = response

        if (!data) {
          reject('Verification failed, please Login again.')
        }

        const { roles, name, avatar, introduction } = data

        // roles must be a non-empty array
        if (!roles || roles.length <= 0) {
          reject('getInfo: roles must be a non-null array!')
        }

        commit('SET_ROLES', roles)
        commit('SET_NAME', name)
        commit('SET_AVATAR', avatar)
        commit('SET_INTRODUCTION', introduction)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

/store/getters.js

import { start } from "nprogress"

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,
  id: state => state.user.id,
  roles: state => state.user.roles,
  routes: state => state.permission.routes,
  addRoutes: state => state.permission.addRoutes,
  permission_routes: state => state.permission.routes

}
export default getters

三、修改渲染的动态路由

这是最关键的一步

/layout/components/Sidebar/index.vue

这个文件的作用是渲染侧边栏

<template>
  <div :class="{'has-logo':showLogo}">
    <logo v-if="showLogo" :collapse="isCollapse" />
    <el-scrollbar wrap-class="scrollbar-wrapper">
      <el-menu
        :default-active="activeMenu"
        :collapse="isCollapse"
        :background-color="variables.menuBg"
        :text-color="variables.menuText"
        :unique-opened="false"
        :active-text-color="variables.menuActiveText"
        :collapse-transition="false"
        mode="vertical"
      >
        <sidebar-item v-for="route in routes" :key="route.path" :item="route" :base-path="route.path" >

        </sidebar-item>
      </el-menu>
    </el-scrollbar>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'
import Logo from './Logo'
import SidebarItem from './SidebarItem'
import variables from '@/styles/variables.scss'
import store from '@/store'
export default {
  components: { SidebarItem, Logo },
  computed: {
    ...mapGetters([
      'permission_routes',
      'sidebar'
      
    ]),
    routes() {
      // console.log("$router.options.routes:"+this.$router.options.routes[2].path)
          // console.log(" store.getters.roles "+store.getters.roles)
          // console.log(" store.getters.routers "+store.getters.routes[0].path)
          // console.log(" store.getters.routers " + store.getters.routes[1].path)
          // console.log(" store.getters.routers " + store.getters.routes[2].path)
          // console.log(" store.getters.routers " + store.getters.routes[3].path)
          // console.log(" store.getters.routers " + store.getters.routes[4].path)
      return store.getters.routes
    },
    activeMenu() {
      const route = this.$route
      const { meta, path } = route
      // if set path, the sidebar will highlight the path you set
      if (meta.activeMenu) {
        return meta.activeMenu
      }
      return path
    },
    showLogo() {
      return this.$store.state.settings.sidebarLogo
    },
    variables() {
      return variables
    },
    isCollapse() {
      return !this.sidebar.opened
    }
  }
}
</script>

修改routes的返回值

    routes() {
      // console.log("$router.options.routes:"+this.$router.options.routes[2].path)
          // console.log(" store.getters.roles "+store.getters.roles)
          // console.log(" store.getters.routers "+store.getters.routes[0].path)
          // console.log(" store.getters.routers " + store.getters.routes[1].path)
          // console.log(" store.getters.routers " + store.getters.routes[2].path)
          // console.log(" store.getters.routers " + store.getters.routes[3].path)
          // console.log(" store.getters.routers " + store.getters.routes[4].path)
      return store.getters.routes
    },

前面我只是列出了一些关键代码，具体我也忘记了还修改了哪些，所以请参照文章开始给的第二个链接进行修改，注释是当时修改源代码测试留下的，兄弟们可以参照打印出来的信息了解整个流程。