1. 重定向也是通过 routes 配置来完成，下面例子是从 /a 重定向到 /b：
    2. const router = new VueRouter({
    3.   routes: [
    4.     { path: '/a', redirect: '/b' }
    5.   ]
    6. })
    1. //router/index.js
    2. const routes = [
    3.   {
    4.     path: '/films',
    5.     name: 'films',
    6.     component: Films,
    7.     children:[
    8.       {
    9.         path:'nowPlaying',
    10.         component:()=>import('../views/NowPlaying.vue')
    11.       },
    12.       {
    13.         path:'comingSoon',
    14.         component:()=>import('../views/ComingSoon.vue')
    15.       }
    16.     ],
    17.     redirect:"/films/nowPlaying"
    18.   },
    19.  ]