大家好！先上图看看本次案例的整体效果。
浪奔，浪流，万里涛涛江水永不休。如果在jq时代来实这个功能简直有些噩梦了，但是自从前端思想发展到现在的以MVVM为主流的大背景下，来实现一个这样繁杂的功能简直不能容易太多。下面就手把手带您一步步拨开这个案例的层层迷雾。
实现步骤如下：
1. api构建部门和员工信息接口，vuex全局存放部门list和员工list数据信息。
api：
export default { getEmployeeList () { return { returncode: 0, message: '', result: [ { id: 1, employeeName: '吴亦凡', departmentId: 44 }, { id: 2, employeeName: '鹿晗', departmentId: 45 }, { id: 3, employeeName: '孙红雷', departmentId: 44 }, { id: 4, employeeName: '周杰伦', departmentId: 45 }, { id: 5, employeeName: '张国荣', departmentId: 45 }, { id: 6, employeeName: '陈百强', departmentId: 45 }, { id: 7, employeeName: '谭咏麟', departmentId: 41 }, { id: 8, employeeName: '谷村新司', departmentId: 45 }, { id: 9, employeeName: '中岛美雪', departmentId: 46 }, { id: 10, employeeName: '周润发', departmentId: 47 }, { id: 14, employeeName: '周慧敏', departmentId: 58 }, { id: 13, employeeName: '张学友', departmentId: 58 } ] } }, getDepartmentList () { return { returncode: 0, message: '', result: [ { id: 40, name: '研发一部', parentId: 37, sequence: 2 }, { id: 41, name: '研发二部', parentId: 37, sequence: 4 }, { id: 43, name: '市场', parentId: 0, sequence: 6 }, { id: 44, name: '销售', parentId: 0, sequence: 4 }, { id: 45, name: '财务', parentId: 0, sequence: 5 }, { id: 46, name: '研发三部', parentId: 37, sequence: 1 }, { id: 47, name: '研发四部', parentId: 37, sequence: 3 }, { id: 37, name: '研发', parentId: 0, sequence: 5 }, { id: 58, name: '研发一部', parentId: 57, sequence: 1 }, { id: 59, name: '测试', parentId: 0, sequence: 5 }, { id: 60, name: '测试一部', parentId: 59, sequence: 1 }, { id: 61, name: '测试二部', parentId: 59, sequence: 2 }, { id: 62, name: '研发二部', parentId: 57, sequence: 2 } ] } }}store:
import dataApi from '@/api/data.api.js'const state = { employeeList: [], departmentList: []}const getters = { employeeList: state => state.employeeList, departmentList: state => state.departmentList}const mutations = { SetEmployeeList (state, { employeeList }) { state.employeeList = employeeList }, SetDepartmentList (state, { departmentList }) { state.departmentList = departmentList }}const actions = { getEmployeeList ({ commit }) { let employeeResult = dataApi.getEmployeeList() if (employeeResult.returncode === 0) { commit('SetEmployeeList', { employeeList: employeeResult.result }) } }, getDepartmentList ({ commit }) { let departmentResult = dataApi.getDepartmentList() if (departmentResult.returncode === 0) { commit('SetDepartmentList', { departmentList: departmentResult.result }) } }}export default { state, getters, mutations, actions, namespaced: true}2. vue.$set为员工对象增加响应式属性checked控制是否选中，methods中创建选中方法如下：
selectEmployee () { var self = this if (self.employee.checked === undefined) { this.$set(self.employee, 'checked', true) } else { self.employee.checked = !self.employee.checked } }3. computed计算属性监控文本框输入字段searchKey的变化实现左侧员工列表实时检索功能。
searchEmployeeList () { var self = this if (self.searchKey.trim() === '') { console.log(self.employeeList) return self.employeeList.filter(item => item.checked === undefined || !item.checked) } else { return self.employeeList.filter(item => (item.employeeName.indexOf(self.searchKey.trim()) !== -1) && (item.checked === undefined || !item.checked)) } }4. 构建组织结构树的部门组件，部门下可能存在子部门和员工，所以组件内部再调用部门组件和员工组件，以达到循环递归的效果。
<template> <li @click.stop="expandTree()"> <a :class="lvl|level"> <span class="expand-tree-icon"> <i class="fa fa-caret-right" :class="{'active':department.expand}"></i> </span> <span> <i class="lcfont lc-department-o"></i> </span> <span class="title"> <span>{{department.name}}</span> <span class="title-desc">({{allChildEmployeeList.length}}人 )</span> <i class="lcfont lc-add" @click.stop="selectDepartmentEmployees()" title="添加整个部门成员"></i> </span> </a> <ul v-show="department.expand"> <child-employee v-for="(employee,index) in childEmployeeList" :employee="employee" :lvl="lvl+1" :key="index" ></child-employee> <child-department v-for="(department,index) in childDepartmentList" :department="department" :employeeList="employeeList" :departmentList="departmentList" :lvl="lvl+1" :key="index" ></child-department> </ul> </li></template>5. 结构树之员工组件
<template> <li v-on:click.stop="selectEmployee()"> <a class="member-item" v-bind:class="lvl|level" href="javascript:;"> <div class="lc-avatar flex-se1" name="true" size="30"> <div class="lc-avatar-30" :title="employee.employeeName"> <span class="lc-avatar-def" style="background-color: rgb(112, 118, 142);"> <div>{{employee.employeeName}}</div> </span> <div class="lc-avatar-name">{{employee.employeeName}}</div> </div> </div> <i class="lcfont" v-bind:class="{'lc-check':employee.checked}"></i> </a> </li></template>6. 和上面员工的选中原理类似，控制部门节点的展开和合并也通过$set方法扩展一个响应式的expand属性。
expandTree () { var self = this if (self.department.expand === undefined) { self.$set(self.department, 'expand', true) } else { self.department.expand = !self.department.expand } }以上就是核心步骤的整体思路，欢迎讨论。