el-menu動態加載路由的實現
先看需要實現的效果
這裡有一級也有二級菜單,註意二級菜單的父目錄(”選項設置“點擊不會跳轉,隻是展開目錄),然後點擊去詳情頁,需要跳到一個隱藏的路由,不在菜單展示的路由
還有一點要註意,就是這裡有兩個router-view,整個頁面是一個router-view,可以由LoginView和HomeView替換(當前看到的頁面),而HomeView下又有一個router-view,需要用來展示部門,系統,超時,員工設置,不合格品列表和不合格品詳情頁。
以上的信息均需要在數據庫的表中體現
先看看直接寫在代碼裡需要哪些操作
const routes = [ { path: '', name: 'login', component: LoginView, } , { component: HomeView, children: [ { path: '/home', name: '不合格品列表', component: BelowStandard }, { path: '/product/:id', name: '不合格品詳情', component: BelowStandardDetail } ] }, { component: HomeView, name: '選項設置', children: [ { path: '/employee', name: '員工設置', component: EmployeeConfig, }, { path: '/department', name: '部門設置', component: DepartmentConfig }, { path: '/system', name: '系統設置', component: SystemConfig }, { path: '/warn', name: '超時提醒', component: WarmConfig } ] }, { component: HomeView, children: [ { path: '/statistics', name: '統計', component: DailyStatistics } ] }, { component: HomeView, children: [ { path: '/log', name: '日志管理', component: LogManager } ] }, ]
這是路由,當要動態從數據庫加載時,就不能寫在這
<el-menu router active-text-color="#ffd04b" background-color="#000" class="el-menu-vertical-demo" :default-active="this.$route.path" text-color="#fff" @open="" @close="" > <el-menu-item index="/home"> <template #title> 不合格品列表 </template> </el-menu-item> <el-sub-menu index="/subMenuConfig"> <template #title> 選項設置 </template> <el-menu-item index="/department">部門設置</el-menu-item> <el-menu-item index="/system">系統設置</el-menu-item> <el-menu-item index="/warn">超時設置</el-menu-item> <el-menu-item index="/employee">員工設置</el-menu-item> </el-sub-menu> <el-menu-item index="/statistics"> <span>統計</span> </el-menu-item> <el-menu-item index="/log"> <span>日志管理</span> </el-menu-item> </el-menu>
這是el-menu開啟瞭路由功能,所以能跳轉路由,當動態加載的時候,這部分需要改造成v-for
數據庫
說明:parent_id為0的即是一級目錄,但是一級目錄裡一部分可以直接展示界面,一部分是展開二級目錄,我這是以component字段為home/HomeView.vue來區分是展示二級目錄。
現在開始寫後端程序,返回菜單的json格式數據。
List<Menu> menuList = menuMapper.getMenuByUserId(UserUtils.getLoginUser().getId()); //根據ParentId分組 Map<Integer, List<Menu>> map = menuList.stream().collect(Collectors.groupingBy(Menu::getParentId, TreeMap::new,Collectors.toList())); List<Menu> menus = map.get(0);//一級菜單 menus.forEach(menu->{//給有二級菜單的目錄設置children屬性 List<Menu> children = map.get(menu.getId()); menu.setChildren(children); }); return menus;
從數據庫查詢到的數據格式如圖,然後分一級二級菜單處理後,再返回前端
[ { "name": "不合格品列表", "path": "/home", "component": "product/BelowStandard.vue", "orderNum": 1, "parentId": 0, "isHidden": false, "children": null }, { "name": "選項設置", "path": "/subMenuConfig", "component": "home/HomeView.vue", "orderNum": 2, "parentId": 0, "isHidden": false, "children": [ { "name": "員工設置", "path": "/employee", "component": "config/EmployeeConfig.vue", "orderNum": 1, "parentId": 2, "isHidden": false, "children": null }, { "name": "部門設置", "path": "/department", "component": "config/DepartmentConfig.vue", "orderNum": 2, "parentId": 2, "isHidden": false, "children": null }, { "name": "系統設置", "path": "/system", "component": "config/SystemConfig.vue", "orderNum": 3, "parentId": 2, "isHidden": false, "children": null }, { "name": "超時提醒", "path": "/warn", "component": "config/WarmConfig.vue", "orderNum": 4, "parentId": 2, "isHidden": false, "children": null } ] }, { "name": "統計", "path": "/statistics", "component": "statistics/DailyStatistics.vue", "orderNum": 3, "parentId": 0, "isHidden": false, "children": null }, { "name": "日志管理", "path": "/log", "component": "log/LogManager.vue", "orderNum": 4, "parentId": 0, "isHidden": false, "children": null }, { "name": "不合格品詳情", "path": "/product/:id", "component": "product/BelowStandardDetail.vue", "orderNum": 5, "parentId": 0, "isHidden": true, "children": null } ]
前端得到數據之後進行處理,再添加到路由,過程中遇到一個問題,vue-router4版本去掉addRoutes換成addRoute帶來的問題困擾我很久
用Vue3就必須用Router4.x版本,由於4.0去掉瞭addRoutes 所以隻能用addRoute
現在是隻能添加一個
function routerPackag(routers:any) { if (routers) { routers.filter((itemRouter:any) => { if (itemRouter.component != "Layout") { router.addRoute('home',{ //home是父組件 add-route添加進父組件chilren裡 path: `${itemRouter.path}`, name: itemRouter.name, meta: { title: itemRouter.name, }, component: () => import(`../views/${itemRouter.component}`), }) } if (itemRouter.children && itemRouter.children.length) { routerPackag(itemRouter.children) } return true }) } }
初始化路由:
router.beforeEach((to, from, next) => {//配置路由守衛 if(to.path==='/'){ next() }else if(store.state.user.id){ initMenus(router,store,next,to) }else{ next({ path: '/',query: {redirect: to.path}}); } }); export const initMenus = (router, store,next,to) => {//按F5刷新的話vuex裡的會被清空,長度變為0 if (store.state.menu !== null) { next() }else { axios.get("/menu").then(response => { if (response) { let responseData = response.data if (responseData.flag) { store.state.menu = responseData.data initRoute(router,store.state) next({...to,replace:true})//解決router4版本的第一次路由不匹配問題 } else { this.$ElMessage.error('請求菜單失敗') } } }) } } const initRoute = (router,state)=> { const loadView = view => {//這種引入方式控制臺不會報警告 // 路由懶加載 return () => import(`@/views/${view}`) }; const menus = state.menu const firstLevelMenu = { children: [], component: loadView('home/HomeView.vue') } menus.forEach(menu=>{ menu.component = loadView(menu.component) if(menu.children === null || menu.children.length === 0){ firstLevelMenu.children.push(menu) }else{ menu.children.forEach(children=>{ children.component = loadView(children.component) }) router.addRoute(menu) } }) router.addRoute(firstLevelMenu) }
完成這些配置之後,路由就能動態加載瞭,然後取出vuex中存儲的menu生成el-menu
vuex中菜單大致如圖
<el-menu router active-text-color="#ffd04b" background-color="#000" class="el-menu-vertical-demo" :default-active="this.$route.path" text-color="#fff" @open="" @close="" > <template v-for="route of this.$store.state.menu"> <template v-if="route.children === null || route.children.length === 0"><!--一級菜單--> <template v-if="!route.isHidden"> <el-menu-item :index = "route.path"> <span>{{route.name}}</span> </el-menu-item> </template> </template> <template v-else><!--二級菜單--> <template v-if="!route.isHidden"> <el-sub-menu :index = "route.path"> <template #title> <span>{{route.name}}</span> </template> <template v-for="children of route.children"> <template v-if="!children.isHidden"> <el-menu-item :index = "children.path"> <span>{{children.name}}</span> </el-menu-item> </template> </template> </el-sub-menu> </template> </template> </template> </el-menu>
實現效果展示
到此這篇關於el-menu動態加載路由的實現的文章就介紹到這瞭,更多相關el-menu動態加載路由內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!
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