使用代码的方式传递：

//路由定义要命名name
{
      path: '/commun',
      name: 'KnowledgeCommun',
      component: KnowledgeCommun,
      children: [
        {
          path: '',
          name: 'RandomLook',
          component: RandomLook
        }, {
          path: 'publish',
          name: 'MyPublish',
          component: MyPublish
        }, {
          path: 'reply',
          name: 'ReplyMe',
          component: ReplyMe
        }, {
          path: 'collect',
          name: 'MyCollect',
          component: MyCollect
        }
      ]
    }

//在父组件中传递userId这个属性，使用名称识别路径
this.$router.push({name: ‘RandomLook’, params: {userId: '123'}});

//子组件中获取参数
//创建页面时获取参数
//是this.$route 不是this.$router
    created() {
      this.getRouterData();
    },
    methods: {
      getRouterData() {
        this.userId = this.$route.params.userId;
      }
    }