vue 实现后台权限管理

向右看齐 2021-09-03 07:01 719阅读 0赞

1.权限管理思路 （权限(被分配)——》角色(被分配）---------》用户）  框架采用 vue-element-admin

2，我设计是角色中直接配置权限，看界面

角色列表

![20201129124914314.png][]

点击列表中  权限设置  打开的界面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpbl96aHU_size_16_color_FFFFFF_t_70][]

权限设置中的树形菜单结构  id是唯一的。对应动态路由中  meta: \{      permission: "对应树形菜单中唯一的id"    \},  便于后期比对显示动态路由

{
    
        "data": [
    
            {
    
                "label": "测试模块",
    
                "id": "test",
    
                "children": [
    
                    {
    
                        "label": "测试列表",
    
                        "id": "test-list",
    
                        "children": [
    
                            {
    
                                "label": "增加",
    
                                "id": "test-add"
    
                            },
    
                            {
    
                                "label": "删除",
    
                                "id": "test-delete"
    
                            },
    
                            {
    
                                "label": "修改",
    
                                "id": "test-update"
    
                            },
    
                            {
    
                                "label": "查看",
    
                                "id": "test-view"
    
                            }
    
                        ]
    
                    }
    
                ]
    
            },
       ]
    }

看一下动态路由

{
          path: 'test',
          component: () => import('@/views/modular/test/index'),
          name: 'test',
          alwaysShow: true,
          meta: {
            title: '测试模块',
            noCache: true,
            permission: "test",
          },
          children: [{
            path: 'test-list',
            component: () => import('@/views/modular/test/list'),
            name: 'test-list',
            meta: {
              title: '测试模块列表',
              noCache: true,
              permission: "test-list",
            },
          }]
        }

4.用户列表：

![20201129130143195.png][]

点击  角色设置  选中 角色列表中的测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpbl96aHU_size_16_color_FFFFFF_t_70 1][]

切换用户登陆   系统用户登陆 看到的菜单

![20201129130938146.png][]

二：代码编写

1）核心代码

vuex 中 peimission.js

import { asyncRoutes, constantRoutes } from '@/router'
    
    /**
     * 通过meta.role判断是否与当前用户权限匹配
     * @param permission
     * @param route
     */
    function hasPermission(permission, route) {
      if(route.meta && route.meta.permission) {
        return permission.indexOf(route.meta.permission) != -1
      } else {
        return false
      }
    }
    
    /**
     * 递归过滤异步路由表，返回符合用户角色权限的路由表
     * @param routes asyncRoutes
     * @param permission
     */
    export function filterAsyncRoutes(routes, permission) { 
      const res = []
    
      routes.forEach(route => {
        const tmp = { ...route }
    
        if (tmp.children) {
          tmp.children = filterAsyncRoutes(tmp.children, permission)
          if (tmp.children && tmp.children.length > 0) {
            res.push(tmp)
          }
        } else {
          if (hasPermission(permission, tmp)) {
            res.push(tmp)
          }
        }
      })
      return res
    }
    
    const permission = {
      state: {
        routes: [],
        addRoutes: []
      },
      mutations: {
        SET_ROUTES: (state, routes) => {
          state.addRoutes = routes
          state.routes = constantRoutes.concat(routes)
        }
      },
      actions: {
        GenerateRoutes({ commit }, data) {
          return new Promise(resolve => {
            const { permission } = data
            let accessedRoutes;
            if(permission.indexOf("*") != -1) {
              accessedRoutes = asyncRoutes;
            } else {
              accessedRoutes = filterAsyncRoutes(asyncRoutes, permission)
            }
            commit('SET_ROUTES', accessedRoutes)
            resolve(accessedRoutes)
          })
        }
      }
    }
    
    export default permission

按钮权限检查代码 untis->permission.js

import store from '@/store'
    
    /**
     * @param {Array} value
     * @returns {Boolean}
     * @example see @/views/permission/directive.vue
     */
    export default function checkPermission (value) { 
      const permissions = store.getters && store.getters.permission
      if (permissions && permissions instanceof Array && permissions.includes("*")) return true
      if (value && value instanceof Array && value.length > 0) {
        const hasPermission = permissions.some(permission => {
          return value.includes(permission)
        })
    
        if (!hasPermission) return false
        return true
      } else if (value && typeof value == 'string') {
        return permissions.includes(value)
      } else {
        return false
      }
    }

mian.js中

import Vue from 'vue'
    
    import 'normalize.css/normalize.css' // A modern alternative to CSS resets
    
    import ElementUI from 'element-ui'
    import 'element-ui/lib/theme-chalk/index.css'
    //import locale from 'element-ui/lib/locale/lang/zh-CN' // lang i18n
    
    import '@/styles/index.scss' // global css
    
    import App from './App'
    import store from './store'
    import router from './router'
    
    import '@/icons' // icon
    import '@/permission' // permission control
    import Avue from '@smallwei/avue';
    import '@smallwei/avue/lib/index.css';
    
    import '@/assets/css/index.scss' 
    /**
     * If you don't want to use mock-server
     * you want to use MockJs for mock api
     * you can execute: mockXHR()
     *
     * Currently MockJs will be used in the production environment,
     * please remove it before going online ! ! !
     */
    // if (process.env.NODE_ENV === 'production') {
    //   const { mockXHR } = require('../mock')
    //   mockXHR()
    // }
    Vue.prototype.checkPermission = require("@/utils/permission").default
    // set ElementUI lang to EN
    Vue.use(Avue);//使用AVUE
    Vue.use(ElementUI)
    // 如果想要中文版 element-ui，按如下方式声明
    // Vue.use(ElementUI)
    
    
    
    Vue.config.productionTip = false
    
    new Vue({
      el: '#app',
      router,
      store,
      render: h => h(App)
    })

mian.js 中 引入的这个文件  import '@/permission'   和main.js 平级

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
    
    NProgress.configure({ showSpinner: false }) // NProgress Configuration
    function hasPermission(permissions, permission) {
      if (!permission || permission == 'home' || permissions.indexOf("*") != -1) {
        return true
      }
      return permissions.indexOf(permission) != -1
    }
    const whiteList = ['/login','/auth-redirect'] // no redirect whitelist
    
    router.beforeEach((to, from, next) => {
    
      NProgress.start()
    
      if (to.meta.title) {
        document.title = "cq-" + to.meta.title;
      } else {
        document.title = "cqadmin";
      }
     
      const hasToken = getToken()
      if (hasToken) {
        if (to.path === '/login') {     
          next({ path: '/' })
          NProgress.done()
        } else {    
          if (store.getters.permission.length === 0) {
            store.dispatch('user/getInfo').then(res => {
           
              const permission = res.results.permission
              if (res.results.is_admin) {
                res.results.permission.push('*')
              }
            
              if (permission.length) {
                store.dispatch('GenerateRoutes', res.results).then(accessRoutes => { // 根据后台查询出的菜单权限生成可访问的路由表          
                  router.addRoutes(accessRoutes) // 动态添加可访问路由表            
                  router.options.routes=store.getters.routers;   //很重要的一句
                 
                  next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 
                })
              } else {
                next({ path: '/401', replace: true, query: { noGoBack: true } })
              }
            }).catch(err => {
              store.dispatch('FedLogOut').then(() => {
                Message.error(err)
                next({ path: '/' })
              })
            })
          }else {
           // debugger
            //next()
            if (hasPermission(store.getters.permission, to.meta.permission)) { // 有权限
              next()
            } else { // 无权限
              next({ path: '/401', replace: true, query: { noGoBack: true } })
            }
          }
    
        }
      } 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()
    })

参考：[https://blog.csdn.net/qq\_33705529/article/details/103582472?utm\_medium=distribute.pc\_relevant\_bbs\_down.none-task-blog-baidujs-1.nonecase&depth\_1-utm\_source=distribute.pc\_relevant\_bbs\_down.none-task-blog-baidujs-1.nonecase][https_blog.csdn.net_qq_33705529_article_details_103582472_utm_medium_distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase_depth_1-utm_source_distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase]

[20201129124914314.png]: /images/20210730/d1db193a74824ea4b0ffcea66943f72f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpbl96aHU_size_16_color_FFFFFF_t_70]: /images/20210730/d8bfcdf566174631ba0696e207c7dd22.png
[20201129130143195.png]: /images/20210730/df2e3db133974ff0af45f30a14aa24fe.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpbl96aHU_size_16_color_FFFFFF_t_70 1]: /images/20210730/1f5d131c3f5b4bc883586b970a43cf51.png
[20201129130938146.png]: /images/20210730/fc4b90dc3775487ea23c64b4e9b7b02a.png
[https_blog.csdn.net_qq_33705529_article_details_103582472_utm_medium_distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase_depth_1-utm_source_distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase]: https://blog.csdn.net/qq_33705529/article/details/103582472?utm_medium=distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase&depth_1-utm_source=distribute.pc_relevant_bbs_down.none-task-blog-baidujs-1.nonecase