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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