大家好！先上图看看本次案例的整体效果。

 完整版实战课程附demo：Vue.js递归组件实现多层级菜单结构树+仿QQ建群选人功能

       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
           }
         ]
       }
     }
   }

   View Code

   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。

 完整版实战课程附demo：Vue.js递归组件实现多层级菜单结构树+仿QQ建群选人功能

Vue.js实战之游戏抽奖系列全集

↓↓↓↓↓↓↓↓↓↓↓

【Vue.js实战案例】- Vue.js实现老虎-机抽奖总结

【Vue.js实战案例】- Vue.js实现九宫格水果机抽奖游戏总结

【Vue.js实战案例】- Vue.js实现大转盘抽奖总结