1、模拟后台返回的菜单JSON数据如下data.json文件

{
    "data": {
        "router": [
            {
                "path": "",
                "name": "Home",
                "component": "Layout",
                "redirect": "dashboard",
                "children": [
                    {
                        "path": "dashboard",
                        "name": "Home",
                        "component": "dashboard/index",
                        "meta": {
                            "title": "首页",
                            "icon": "dashboard"
                        }
                    }
                ]
            },
            {
                "path": "/example",
                "component": "Layout",
                "redirect": "/example/table",
                "name": "Example",
                "meta": {
                    "title": "案例",
                    "icon": "example"
                },
                "children": [
                    {
                        "path": "table",
                        "name": "Table",
                        "component": "table/index",
                        "meta": {
                            "title": "表格",
                            "icon": "table"
                        }
                    },
                    {
                        "path": "tree",
                        "name": "Tree",
                        "component": "tree/index",
                        "meta": {
                            "title": "树形菜单",
                            "icon": "tree"
                        }
                    }
                ]
            },
            {
                "path": "/form",
                "name": "Form",
                "component": "Layout",
                "children": [
                    {
                        "path": "index",
                        "name": "Form",
                        "component": "form/index",
                        "meta": {
                            "title": "表单",
                            "icon": "form"
                        },
                        "children": [
                            {
                                "path": "index",
                                "name": "Row",
                                "component": "form/index",
                                "meta": {
                                    "title": "行",
                                    "icon": "form"
                                }
                            },
                            {
                                "path": "index",
                                "name": "Col",
                                "component": "form/index",
                                "meta": {
                                    "title": "列",
                                    "icon": "form"
                                }
                            }
                        ]
                    }
                ]
            }
        ]
    }
}

2、模拟接口取json文件数据，如下mock.js

import Mock from 'mockjs'
const MenuList=require('./data.json');
//获取菜单模块
Mock.mock('/api/getMenuList', (req, res) => {
  return {
    "result": "success",
    "data": MenuList,
    "msg": "获取成功"
  }
});

 3、定义接口文件api.js,调用mock中的接口，抛出接口

import axios from './http'; // 导入http中创建的axios实例
const api = {
    getMenuList(params) {
        return axios.post('/api/getMenuList', JSON.stringify(params));
    },
}
export default api;

4、home组件

<template>
  <el-aside>
    <Menu :list="listData"></Menu>
  </el-aside>
</template>
<script>
import Menu from "./Menu.vue";
export default {
  name: "home",
  components: {
    Menu
  },
  data() {
    return {
      listData: []
    };
  },
  mounted() {
    this.getData();
  },
  methods: {
    //获取菜单列表数据
    getData: function() {
      let that = this;
      this.$api.getMenuList().then(res => {
        let result = res.data;
        that.listData = result.data.data.router;
      });
    }
  }
};
</script>

效果如下：

5、Menu组件定义

<template>
  <ul class="wrapper">
    <MenuItem :key="index" v-for="(item, index) in list">
      <span v-if="item.children">
        <span @click="handleToggleShow" class="item-title">{{item.name}}</span>
        <Menu :list="item.children" v-if="toggleShow"></Menu>
      </span>
      <template v-else>
        <span>{{item.name}}</span>
      </template>
    </MenuItem>
  </ul>
</template>
<script>
import MenuItem from "./MenuItem";
export default {
  name: "Menu",
  props: ["list"], //Menu组件接受一个list作为菜单数据
  components: { MenuItem },
  data() {
    return {
      toggleShow: false //子菜单是否显示
    };
  },
  methods: {
    handleToggleShow() {
      this.toggleShow = !this.toggleShow;
    }
  }
};
</script>
<style lang="stylus" scoped>
.wrapper {
  cursor: pointer;
  .item-title {
    font-size: 16px;
    font-weight: bold;
  }
}
</style>

6、MenuItem组件定义

<template>
  <li class="item">
    <slot />
  </li>
</template>
<style lang="stylus" scoped>
.item {
  margin: 10px 0;
  padding: 10px;
  border-radius: 4px;
  list-style: none;
  background: red;
  color: #fff;
}
</style>

7、main.js全局引入注册

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
// 引入axios
import axios from 'axios';
// 挂载到vue原型链上
Vue.prototype.axios = axios;
// 引入api接口
import api from './api'
Vue.prototype.$api = api;
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
Vue.use(ElementUI)
Vue.config.productionTip = false
require('./mock/mock.js');
/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})