一、项目启动后，输入localhost:8080直接跳转到404

修改路由

router/index.js

{
        path: '/404',
        name: '404',
        component: () => import('../views/404.vue')
    },



// 路由守卫
router.beforeEach((to, from, next) => {
    localStorage.setItem("currentPathName", to.name)  // 设置当前的路由名称，为了在Header组件中去使用
    store.commit("setPath")  // 触发store的数据更新


    //未找到路由的情况
    if (!to.matched.length) {
        const storeMenus = localStorage.getItem("menus")
        if (storeMenus) {
            next("/404")
        } else {
            //跳回登录页面
            next("/login")
        }
    }
    //其他的情况
    next()

})

二、个人信息页面404

router/index.js

const manageRoute = {
            path: '/',
            name: 'Manage',
            component: () => import('../views/Manage.vue'),
            redirect: "/home",
            children: [
                {
                    path: '/person',
                    name: '个人信息',
                    component: () => import('../views/Person.vue'),
                },
            ]
        }

三、新建页面404

1.新建页面

2.页面添加菜单

3.给管理员分配菜单

3.重新登录

4.点进刚分配的菜单

5.404

router/index.js

//提供一个重置路由的方法
export const resetRouter=()=>{
    router.matcher = new VueRouter({
        mode:'history',
        base:process.env.BASE_URL,
        routes
    })
}

store/index.js

logout(){
            localStorage.removeItem("user")
            localStorage.removeItem("menus")
            router.push("/login")

            //重置路由
            resetRouter()
        }

优化创建路由，防止频繁创建

//注意刷新页面会导致重置路由
export const setRoutes = () => {
    const storeMenus = localStorage.getItem("menus");
    if (storeMenus) {

        //获取当前的路由对象名称数组
        const currentRouteNames = router.getRoutes().map(v => v.name)
        if (!currentRouteNames.includes('Manage')) {
            //拼装动态路由
            const manageRoute = {
                path: '/',
                name: 'Manage',
                component: () => import('../views/Manage.vue'),
                redirect: "/home",
                children: [
                    {
                        path: '/person',
                        name: '个人信息',
                        component: () => import('../views/Person.vue'),
                    },
                ]
            }
            const menus = JSON.parse(storeMenus)
            menus.forEach(item => {
                //当且仅当path不为空的时候才去设置路由
                if (item.path) {
                    let itemMenu = {
                        path: item.path.replace("/", ""),
                        name: item.name,
                        component: () => import('../views/' + item.pagePath + '.vue')
                    }
                    manageRoute.children.push(itemMenu)
                } else if (item.children.length) {
                    item.children.forEach(item => {
                        if (item.path) {
                            let itemMenu = {
                                path: item.path.replace("/", ""),
                                name: item.name,
                                component: () => import('../views/' + item.pagePath + '.vue')
                            }
                            manageRoute.children.push(itemMenu)
                        }
                    })
                }
            })
            //动态添加到现在的路由对象中去
            router.addRoute(manageRoute)
        }
    }
}