java+vue3+el-tree实现树形结构操作

基于springboot + vue3 elementPlus实现树形结构数据的添加、删除和页面展示

效果如下

代码如下，业务部分可以自行修改

• java后台代码

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.daztk.mes.common.annotation.LogOperation;
import com.daztk.mes.common.utils.Result;
import com.daztk.mes.module.cad.dto.CadPartDto;
import com.daztk.mes.module.cad.entity.CadPart;
import com.daztk.mes.module.cad.entity.CadRelation;
import com.daztk.mes.module.cad.service.ICadPartService;
import com.daztk.mes.module.cad.service.ICadRelationService;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import java.util.*;
import java.util.stream.Collectors;/*** <p>* 零部件 * </p>** @since 2024-05-30*/
@RestController
@RequestMapping("cad/part")
public class CadPartController {@AutowiredICadPartService service;@AutowiredICadRelationService relationService;/*** 获取所有零部件* @param dto* @return*/@GetMapping("listAll")public Result listAll(CadPartDto dto){List<CadPart> list = new ArrayList<>();try {list = service.getList(dto);if(CollectionUtils.isNotEmpty(list)){list = getTree(list);}} catch (Exception e) {e.printStackTrace();return new Result().err();}return new Result().ok().setData(list);}@PostMapping("add")@LogOperation(tags = "CAD管理-零部件",serviceClass = ICadPartService.class,entityClass = CadPart.class)public Result add(@RequestBody CadPart cadPart){try {service.saveData(cadPart);} catch (Exception e) {e.printStackTrace();return new Result().err();}return new Result().ok().setData(cadPart);}@DeleteMapping("delete")@LogOperation(tags = "CAD管理-零部件",serviceClass = ICadPartService.class,entityClass = CadPart.class)public Result delete(@RequestBody Long[] ids){try {List<Long> idList = Arrays.asList(ids);List<Long> list = recurveIdList(idList);service.removeByIds(list);} catch (Exception e) {e.printStackTrace();return new Result().err();}return new Result().ok();}/*** 递归获取id树** @param ids* @return*/public List<Long> recurveIdList(List<Long> ids){List<Long> list = new ArrayList<>();for(Long id: ids){list.add(id);//关系表查子集List<CadRelation> cadRelations = relationService.list(new QueryWrapper<CadRelation>().eq("parent_id", id));if(CollectionUtils.isNotEmpty(cadRelations)){List<Long> partIds = cadRelations.stream().map(CadRelation::getPartId).collect(Collectors.toList());List<Long> list1 = recurveIdList(partIds);list.addAll(list1);}}return list;}public List<CadPart> getTree(List<CadPart> treeList){List<CadPart> collect = treeList.stream().filter(item -> item.getParentId() == 0)//构造最外层节点，即id=0的节点.map(item -> {item.setChildren(getChildren(item, treeList));//id=0的节点就为他设置子节点return item;}).collect(Collectors.toList());return collect;}private static List<CadPart> getChildren(CadPart treeEntity, List<CadPart> treeEntityList) {List<CadPart> collect = treeEntityList.stream().filter(item -> item.getParentId().equals(treeEntity.getId()))//判断当前节点的父id是不是要设置节点的id.map(item -> {item.setChildren(getChildren(item, treeEntityList));//如果是 为其设置子节点 通过递归 为每个除了最外层节点的节点设置子节点return item;}).collect(Collectors.toList());return collect;}

• 前端代码

<template><div class="custom-tree-container"><!-- <p>Using render-content</p><el-tree style="max-width: 600px" :data="dataSource" show-checkbox node-key="id" default-expand-all:expand-on-click-node="false" :render-content="renderContent" /> --><el-button type="primary" class="add-btn" icon="el-icon-circle-plus-outline" @click="addEdit">新增零部件</el-button><div style="padding-top: 20px;"><el-tree style="max-width: 600px; " :data="dataSource" show-checkbox node-key="id" default-expand-all:expand-on-click-node="false" ref="treeRef" :props="mapProps"><template #default="{ node, data }"><span class="custom-tree-node"><span>{{ node.label }}</span><span><a @click="append(data)"> 增加子节点 </a><a style="margin-left: 8px" @click="removeNode(node, data)"> 删除 </a></span></span></template></el-tree></div><el-dialog :title="title" v-model="drawer" width="600px"><el-form :model="partForm" :rules="rules" ref="ruleFormsss" label-width="120px" class="demo-partForm"><el-form-item label="数模号：" prop="partNo"><el-input v-model="partForm.partNo" clearable></el-input></el-form-item><el-form-item label="版本号：" prop="partRev"><el-input v-model="partForm.partRev" clearable></el-input></el-form-item><el-form-item label="名称：" prop="name"><el-input v-model="partForm.name" clearable></el-input></el-form-item><el-form-item label="中文名称：" prop="cName"><el-input v-model="partForm.cName" clearable></el-input></el-form-item><el-form-item label="材料：" prop="material"><el-input v-model="partForm.material" clearable></el-input></el-form-item><el-form-item label="规格：" prop="gauge"><el-input v-model="partForm.gauge" clearable></el-input></el-form-item><el-form-item label="重量：" prop="massqty"><el-input v-model="partForm.massqty" clearable></el-input></el-form-item><el-form-item label="数据类型：" prop="partType"><el-input v-model="partForm.partType" clearable></el-input></el-form-item></el-form><template #footer><span class="dialog-footer"><el-button @click="cancelEdit">取 消</el-button><el-button type="primary" @click="saveEdit">确 定</el-button></span></template></el-dialog></div>
</template><script>
import { reactive, ref, toRefs, unref, onMounted } from 'vue'
import { add, remove, listAll } from '@api/cad/part'
import { ElMessage } from 'element-plus'export default {name: 'part',setup() {const state = reactive({drawer: false,title: '',query: {partName: ''},dataSource: [// {//   id: 1,//   label: 'Level one 1',//   children: []//   // children: [//   //   {//   //     id: 4,//   //     label: 'Level two 1-1',//   //     children: [//   //       {//   //         id: 9,//   //         label: 'Level three 1-1-1'//   //       }//   //     ]//   //   }//   // ]// }],mapProps: {id: 'id',label: 'name',children: 'children'}})const treeRef = ref(null)const append = (data) => {state.drawer = truestate.title = '添加子节点'partForm.parentId = data.idpartForm.partNo = ''partForm.partRev = ''partForm.name = ''partForm.cName = ''partForm.material = ''partForm.gauge = ''partForm.massqty = ''partForm.partType = ''// debugger// 获取当前节点// const currentNode = treeRef.value.getNode(data.id)// // 获取当前节点在树中的索引// // const currentIndex = getNod(data.id)// // // 如果索引大于 0，获取前一个节点// // if (currentIndex > 0) {// //   const prevNode = getNodeAt(currentIndex - 1);// //   const prevId = prevNode.id; // //   // 处理前一个节点的 id// // }// let treeNodeId = data.$treeNodeId //节点id// console.info(data)// // alert('当前id'+data.id)// // alert(data.$treeNodeId)// let id = null// if (!data.children || data.children.length == 0) {//   //没有子节点//   id = data.id * 100 + 1// } else {//   id = data.id * 100 + 1 + data.children.length// }// const newChild = { id: id, label: data.label + '-' + id, children: [] }// const child = [{ id: id, label: data.label + '-' + id, children: [] }]// data.children  = child// data.push()// state.dataSource = [data];}const removeNode = (node, data) => {const ids = []ids.push(data.id)remove(ids).then(res => {if (res.code == 200) {ElMessage({type: 'success',message: '删除成功'})getPartTableData(state.query)} else {ElMessage({type: 'error',message: res.msg})}})// dataSource.value = [...dataSource.value];}const partForm = reactive({partNo: '',partRev: '',name: '',cName: '',material: '',gauge: '',massqty: '',partType: '',parentId: ''})const ruleFormsss = ref(null)const addEdit = () => {state.drawer = truestate.title = '添加零部件'partForm.parentId = ''partForm.partNo = ''partForm.partRev = ''partForm.name = ''partForm.cName = ''partForm.material = ''partForm.gauge = ''partForm.massqty = ''partForm.partType = ''}// 取消const cancelEdit = () => {state.drawer = falsesetTimeout(() => {const form = unref(partFormsss)form.resetFields()}, 100)}// 新建/编辑零部件const saveEdit = async () => {const form = unref(ruleFormsss)if (!form) returntry {await form.validate()if (state.title == '添加零部件' || state.title == '添加子节点') {addSavePart()}if (state.title == '编辑零部件') {updateSavePart()}state.drawer = false} catch (error) {console.error(error)ElMessage.error('抱歉，您有必填项未填！')}}const addSavePart = () => {// let quantity = partForm.quantity + partForm.iQuantityconst data = {partNo: partForm.partNo,partRev: partForm.partRev,name: partForm.name,cName: partForm.cName,material: partForm.material,gauge: partForm.gauge,massqty: partForm.massqty,partType: partForm.partType,parentId: partForm.parentId}add(data).then(res => {state.drawer = false// const treeData = {//   id: res.data.id,//   label: res.data.name,//   children: []// }// state.dataSource = res.datagetPartTableData(state.query)ElMessage.success('恭喜您，添加成功！')})}const updateSavePart = () => {const data = {id: state.handleId,name: partForm.name,manager: partForm.manager,startDate: partForm.startDate,endDate: partForm.endDate}update(data).then(res => {state.drawer = falsegetPartTableData(state.query)ElMessage.success('恭喜您，保存成功！')})}const rules = {name: [{ required: true, message: '此处为必填项', trigger: 'blur' }]}function getPartTableData() {listAll(state.query).then(res => {state.dataSource = res.data})}onMounted(() => {getPartTableData()})return {...toRefs(state),append,removeNode,addEdit,cancelEdit,treeRef,partForm,ruleFormsss,saveEdit,rules}}
}</script><style lang="scss" >
.el-tree-node {margin-top: 8px;
}
.custom-tree-node {flex: 1;display: flex;align-items: center;justify-content: space-between;font-size: 18px;padding-right: 8px;
}</style>