SPA项目开发之动态树+数据表格+分页

1. 后台数据
t_vue_user
t_vue_tree_node
t_vue_articles

2. 动态生成NavMenu导航菜单(只支持2级菜单)
2.1 结构
<el-menu key="" index="">
<el-submenu>
<template slot="title">
<i class="el-icon-location"></i>
<span>导航一</span>
</template>
<template slot="title">分组一</template>
<el-menu-item route="">

2.2 vue+element的el-menu组件实现路由跳转及当前项的设置
<el-menu router :default-active="$route.path">
<el-menu-item index="/company/userManager">用户管理</el-menu-item>
LeftNav.vue

<template>
    <el-menu router :default-active="$route.path" default-active="2" class="el-menu-vertical-demo" background-color="#334157"
     text-color="#fff" active-text-color="#ffd04b" :collapse="collapsed" >
        <!-- <el-menu default-active="2" :collapse="collapsed" collapse-transition router :default-active="$route.path" unique-opened class="el-menu-vertical-demo" background-color="#334157" text-color="#fff" active-text-color="#ffd04b"> -->
        <div class="logobox">
            <img class="logoimg" src="../assets/img/logo.png" alt="">
        </div>
        <el-submenu :index="'id_'+m.treeNodeId" v-for="m in menus">
            <template slot="title">
                <i :class="m.icon"></i>
                <span>{{m.treeNodeName}}</span>
            </template>
            <el-menu-item :key="'id_'+m2.treeNodeId" :index="m2.url" v-for="m2 in m.children">
                <i :class="m2.icon"></i>
                <span>{{m2.treeNodeName}}</span>
            </el-menu-item>
        </el-submenu>
    </el-menu>
</template>
<script>
    export default {
        data(){
            return{
                collapsed:false,
                menus:[]
            }
        },
        created(){
            this.$root.Bus.$on('collapsed-side',(v)=>{
                this.collapsed= v ;
            })
            
            let url = this.axios.urls.SYSTEM_MENU_TREE;
            this.axios.post(url, {}).then((response)=>{
                console.log(response);
                this.menus=response.data.result;
            }).catch(function(error) {
                console.log(error);
            });
        }
    }
</script>
<style>
    .el-menu-vertical-demo:not(.el-menu--collapse) {
        width: 240px;
        min-height: 400px;
    }

    .el-menu-vertical-demo:not(.el-menu--collapse) {
        border: none;
        text-align: left;
    }

    .el-menu-item-group__title {
        padding: 0px;
    }

    .el-menu-bg {
        background-color: #1f2d3d !important;
    }

    .el-menu {
        border: none;
    }

    .logobox {
        height: 40px;
        line-height: 40px;
        color: #9d9d9d;
        font-size: 20px;
        text-align: center;
        padding: 20px 0px;
    }

    .logoimg {
        height: 40px;
    }
</style>

将Articles路由配置好

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import Login from '@/views/Login'
import Reg from '@/views/Reg'
import AppMain from '@/components/AppMain'
import LeftNav from '@/components/LeftNav'
import TopNav from '@/components/TopNav'
import Articles from '@/views/sys/Articles'

Vue.use(Router)
export default new Router({
      routes: [{
          path: '/',
          name: 'Login',
          component: Login
          },
          {
               path: '/Login',
          name: 'Login',
          component: Login
           },
             {
               path: '/Reg',
          name: 'Reg',
          component: Reg
          },
           {
               path: '/AppMain',
          name: 'AppMain',
          component: AppMain,
          children:[{
                       path: '/LeftNav',
                    name: 'LeftNav',
                    component: LeftNav,
                },
                {
                       path: '/TopNav',
                    name: 'TopNav',
                    component: TopNav,
                     },
                     {
                       path: '/sys/Articles',
                    name: 'Articles',
                    component: Articles
                     }
            ]
          }
      ]
    })

注1：要实现路由跳转，先要在el-menu标签上添加router属性，然后只要在每个el-menu-item标签内
的index属性设置一下url即可实现点击el-menu-item实现路由跳转。
注2：导航当前项，在el-menu标签中绑定 :default-active="$route.path",注意是绑定属性，
不要忘了加“:”,当$route.path等于el-menu-item标签中的index属性值时则该item为当前项。

注3：后台t_tree_node表有几个节点的url为空，则会导致几个节点样式会一致

2.3 数据表格
<el-table :data="result" style=" 100%;" :border="true" max-height="550">
<el-table-column prop="id" label="ID" min-width="10" align="center"></el-table-column>
<el-table-column prop="title" label="标题" min-width="20"></el-table-column>
<el-table-column prop="body" label="内容" min-width="70"></el-table-column>
</el-table>

在views中新建一个目录sys,在sys中再建一个Articles, 

作用：绑定elementui提供的分页组件来完成分页功能

附录一：vue中如何修改[数组中][对象的值]
data:{
empList:[{eid:1,ename:'zs'},{eid:2,ename:'ls'}]
}

this.empList[0].ename="zss";//vue 中是无法检测到根据索引值修改的数据变动的

解决方案：通过Vue数组变异方法可以动态控制数据的增减
// 第一个参数是要修改的数据, 第二个值是修改当前数组的哪一个字段,第三个是要修改为什么值
this.$set(this.empList[index], 'ename', 'zss')
或者
Vue.set(this.empList[index], 'ename', 'zss') 

<!-- 分页条 -->
<el-pagination style="margin-top: 20px;" @size-change="handleSizeChange" @current-change="handleCurrentChange"
:current-page="formInline.page" :page-sizes="[10, 20, 30, 50]" :page-size="100" layout="total, sizes, prev, pager, next, jumper"
:total="formInline.total">
</el-pagination>

handleSizeChange(rows) {
this.formInline.page = 1;
this.formInline.rows = rows;
this.search();
},
handleCurrentChange(page) {
this.formInline.page = page;
this.search();
}

最终效果：