index.js：

import Vue from 'vue'
import Router from 'vue-router'
import MainPage from '@/components/MainPage'
import News from '@/views/News'
import Watch from '@/views/Watch'
import Entertainment from '@/views/Entertainment'
import Hot from '@/views/Hot'
import International from '@/views/International'
import Military from '@/views/Military'
import Pic from '@/views/Pic'
import Recommend from '@/views/Recommend'
import Tech from '@/views/Tech'
import Video_ from '@/views/Video_'

Vue.use(Router);

export default new Router({
  routes: [
    {
      path: '/',
      //默认跳转到推荐，实现默认页面
      redirect:'/recommend',
      name: 'mainpage',
      component: MainPage,
      children: [
        {
          path: 'news',
          component: News
        },
        {
          path: '/watch',
          name: "watch",
          component: Watch
        },
        {
          path:'/entertainment',
          name: "entertainment",
          component: Entertainment
        },
        {
          path:'/hot',
          name: "hot",
          component: Hot
        },
        {
          path:'/international',
          name: "international",
          component: International
        },
        {
          path:'/military',
          name: "military",
          component: Military
        },
        {
          path:'/pic',
          name: "pic",
          component: Pic
        },
        {
          path:'/recommend',
          name: "recommend",
          component: Recommend
        },
        {
          path:'/tech',
          name: "tech",
          component: Tech
        },
        {
          path:'/video',
          name: "video_",
          component: Video_
        },
      ]
    },
    {
      path: '/news',
      name: 'news',
      component: News
    },
    //如果是子路由，必须要把路由放到子路由下，下面代码为错误示例！
    // {
    //   path: '/watch',
    //   name: 'watch',
    //   component: Watch
    // },
    //  {
    //   path: '/recommend',
    //   name: 'recommend',
    //   component: Recommend
    // },
  ]
})