如圖：需要登陸頁面單獨(dú)顯示，現(xiàn)在都在頭尾中間====router.jsimport Vue from 'vue'import Router from 'vue-router'import Index from '../components/index'import Classify from '../components/classify'import Cart from '../components/cart'import Center from '../components/center'import Login from '../components/welcome'Vue.use(Router)export default new Router({    mode: 'history',  routes: [    {      path: '/welcome',      component: Login    },    {      path: '/',      component: Index    },    {      path: '/classify',      component: Classify    },    {      path: '/cart',      component: Cart    },    {      path: '/center',      component: Center    }  ]})