【sgTree】自定义组件：加载el-tree树节点整棵树数据，实现增删改操作。

特性 

1. 可以自定义主键、配置选项
2. 支持预定义节点图标：folder文件夹|normal普通样式
3. 多个提示文本可以自定义
4. 支持动态接口增删改节点
5. 可以自定义根节点id
6. 可以设置最多允许添加的层级深度
7. 支持拖拽排序，排序过程还可以针对拖拽的节点深度进行自定义限制
8. 支持隐藏一级节点（根节点）复选框☑
9. 支持屏蔽一级节点（根节点）勾选☑

sgTree源码 

<template><div :class="$options.name"><div class="tree-header" v-if="!(readonly || readonly === '')"><div class="sg-left"><template v-if="uploadData"><el-tooltippopper-class="sg-el-tooltip":enterable="false"effect="dark":content="`支持拖拽到树上传文件`"placement="top-start"><el-buttontype="text"icon="el-icon-upload"size="mini"@click="(d) => $refs.sgUpload.triggerUploadFile()">批量导入</el-button></el-tooltip><el-button type="text" icon="el-icon-download" size="mini" @click="downloadTpl">下载模板</el-button></template></div><div class="sg-right"><el-button type="text" size="mini" @click.stop="addRoot">{{ (data.text || {}).addRootButtonText || `添加根节点`}}<i class="el-icon-circle-plus-outline"></i></el-button></div></div><div class="tree-container"><el-tree:class="hideRootNodeCheckbox === '' || hideRootNodeCheckbox? 'hideRootNodeCheckbox': ''"ref="tree":data="treeData":node-key="mainKey":props="data.props || {label: 'label', //指定节点标签为节点对象的某个属性值children: 'children', //指定子树为节点对象的某个属性值disabled: 'leaf', //指定节点选择框是否禁用为节点对象的某个属性值isLeaf: 'leaf', //指定节点是否为叶子节点，仅在指定了 lazy 属性的情况下生效}":icon-class="`${data.iconType}-tree-node`":indent="data.indent || 10"@current-change="current_change"@node-click="nodeClick"highlight-current@node-drag-start="nodeDragStart"@node-drag-enter="nodeDragEnter"@node-drag-leave="nodeDragLeave"@node-drag-over="nodeDragOver"@node-drag-end="nodeDragEnd"@node-drop="nodeDrop":draggable="draggable === '' || draggable":allow-drop="allowDrop":allow-drag="allowDrag":show-checkbox="showCheckbox":default-checked-keys="defaultCheckedKeys"@check-change="handleCheckChange"><el-popoverpopper-class="tree-el-popover"placement="right"trigger="hover"title=""content="":disabled="readonly || readonly === ''"slot-scope="{ node, data }"><span class="right"><el-buttontitle="添加"type="text"size=""icon="el-icon-circle-plus-outline"@click.stop="addNode(node, data)"v-if="showAddButton(node)">添加</el-button><el-buttontitle="删除"type="text"size=""icon="el-icon-remove-outline"@click.stop="remove(node, data)">删除</el-button></span><div slot="reference" class="node-label"><div class="left" :title="node.label">{{ node.label }}</div></div></el-popover></el-tree><!-- 上传组件 --><sgUpload:disabledWhenShowSels="['.v-modal']":drag="uploadData ? dragUpload : false"ref="sgUpload":data="uploadData"@uploadSuccess="uploadSuccess"@uploadError="uploadError"@importError="importError"@showLoading="showLoading"@hideLoading="hideLoading"hideUploadTray/></div></div>
</template><script>
import sgUpload from "@/vue/components/admin/sgUpload";
export default {name: "sgTree",components: {sgUpload,},data() {return {// 动态树：增删改_________________________________________________________rootNode: null, //根节点rootResolve: null, //根节点focusNodeId: null, //聚焦高亮新添加IDmainKey: "id", //默认主键defaultRootId: "root", //默认根节点ID就是rootmaxAddLevel: null, // 最多允许添加的层级dragUpload: true, //在拖拽节点过程中控制上传组件能否拖拽上传// _________________________________________________________};},props: ["treeData","data","readonly","draggable", //是否开启拖拽节点功能"uploadData",/* 例子 uploadData: {accept: '.xls,.xlsx',actionUrl: `${this.$d.API_ROOT_URL}/core/resource/upload`,}, */"allowNodeDrag","allowNodeDrop","showCheckbox", //节点是否可被选择"hideRootNodeCheckbox", //隐藏一级节点复选框☑"disabledRootNode", //屏蔽一级节点勾选☑"defaultCheckedKeys", //默认勾选的节点的 key 的数组],watch: {data: {/* data.iconType= 节点图标：folder  文件夹normal  普通样式plus    加减符号样式*/handler(d) {d.nodeKey && (this.mainKey = d.nodeKey); //主键d.rootId && (this.defaultRootId = d.rootId); //根节点IDd.maxAddLevel && (this.maxAddLevel = d.maxAddLevel); // 最多允许添加的层级},deep: true,immediate: true,},},methods: {showLoading(file) {this.$emit(`showLoading`, file);},hideLoading(file) {this.$emit(`hideLoading`, file);},// 取消选中unCheckAll(d) {this.$refs.tree.setCheckedKeys([]);this.handleCheckChange([], []);},handleCheckChange(data, checked, indeterminate) {this.$emit(`checkChange`, {checkedNodes: this.$refs.tree.getCheckedNodes(),checkedLeafOnlyNodes: this.$refs.tree.getCheckedNodes(true, false), //(leafOnly, includeHalfChecked) 接收两个 boolean 类型的参数，1. 是否只是叶子节点，默认值为 false 2. 是否包含半选节点，默认值为 false【注意：懒加载树形不管用！必须要明确叶子节点展开后面没有子节点了才能识别！】data,checked,indeterminate,});},// 拖拽----------------------------------------nodeDragStart(node, ev) {this.dragUpload = false;this.$emit(`nodeDragStart`, node, ev);},nodeDragEnter(draggingNode, dropNode, ev) {this.$emit(`nodeDragEnter`, draggingNode, dropNode, ev);},nodeDragLeave(draggingNode, dropNode, ev) {this.$emit(`nodeDragLeave`, draggingNode, dropNode, ev);},nodeDragOver(draggingNode, dropNode, ev) {this.$emit(`nodeDragOver`, draggingNode, dropNode, ev);},nodeDragEnd(draggingNode, dropNode, dropType, ev) {// dropType有'before'、'after'、'inner'和'none'4种情况this.dragUpload = true;this.$emit(`nodeDragEnd`, draggingNode, dropNode, dropType, ev);},nodeDrop(draggingNode, dropNode, dropType, ev) {// dropType有'before'、'after'、'inner'和'none'4种情况this.$emit(`nodeDrop`, draggingNode, dropNode, dropType, ev);},allowDrop(draggingNode, dropNode, dropType) {// 拖拽时判定目标节点能否被放置。dropType 参数有三种情况：'prev'、'inner' 和 'next'，分别表示放置在目标节点前、插入至目标节点和放置在目标节点后（注意：很奇葩上面node开头的绑定方法dropType有before、after、inner和none4种情况）return this.allowNodeDrop? this.allowNodeDrop(draggingNode, dropNode, dropType): true;},allowDrag(draggingNode) {return this.allowNodeDrag ? this.allowNodeDrag(draggingNode) : true;},// ----------------------------------------showAddButton(node) {if (this.maxAddLevel) {return node.level < this.maxAddLevel; // 最多允许添加的层级} else return true;},downloadTpl(d) {this.$emit(`downloadTpl`);},uploadSuccess(d, f) {this.$emit(`uploadSuccess`, d, f);},uploadError(d, f) {this.$emit(`uploadError`, d, f);},importError(d, f) {this.$emit(`importError`, d, f);},// 聚焦到某一个节点focusNode(id) {if (!id) return;this.$nextTick(() => {this.$refs.tree.setCurrentKey(id); //高亮显示某个节点this.$emit(`currentChange`, this.$refs.tree.getCurrentNode());this.$nextTick(() => {let dom = document.querySelector(`.el-tree-node.is-current`);dom &&dom.scrollIntoView({behavior: "smooth",block: "nearest",inline: "nearest",}); //缓慢滚动});});},// 添加根节点addRoot() {this.addNode(this.$refs.tree.root, { [this.mainKey]: this.defaultRootId });},// 通过id展开指定节点（通常是用于外部调用）expandNodeById(id) {let node = this.$refs.tree.getNode(id);node.expand();},//通过id勾选节点setCheckedKeys(ids) {this.$refs.tree.setCheckedKeys(ids);},// 添加节点addNode(node, data) {let resolve = (d) => {if (data.ID === this.defaultRootId) {this.treeData.unshift(d);} else {data.children || this.$set(data, "children", []);data.children.push(d);}node.expand();};let reject = (d) => {this.rootLoading = false;node.loading = false;this.$message.error(d.msg); //添加节点失败};this.$emit(`addNode`, { node, data, resolve, reject });},// 删除节点remove(node, data) {this.$confirm((this.data.text || {}).removeConfirmTip ||`此操作将永久删除该节点及其下面的节点，是否继续？`,(this.data.text || {}).removeConfirmTitle || `提示`,{dangerouslyUseHTMLString: true,confirmButtonText: `确定`,cancelButtonText: `取消`,type: "warning",}).then(() => {this.removeNodeData(node, data);}).catch(() => {});},// 删除节点数据（通过接口向后台删除数据）removeNodeData(node, data) {node.loading = true; //出现加载动画let resolve = (d) => {node.loading = false;this.$message.success(`删除成功`);// 从父节点异步删除子节点const parent = node.parent;const children = parent.data.children || parent.data;const index = children.findIndex((d) => d[this.mainKey] === data[this.mainKey]);children.splice(index, 1);// 从显示界面删除节点（有bug，只是删除了树节点的Virtual DOM，实际数据还在）/* let childNodes = node.parent.childNodes; childNodes.splice( childNodes.findIndex((d) => d.data[this.mainKey] === data[this.mainKey]), 1 ); */};let reject = (d) => {this.rootLoading = false;node.loading = false;this.$message.error(d.msg); //删除失败};this.$emit(`removeNode`, { node, data, resolve, reject });},// 当前选中节点变化时触发的事件current_change(d) {this.$emit(`currentChange`, d);},//点击节点nodeClick(d) {this.focusNodeId = null;this.$emit(`nodeClick`, d);},},
};
</script><style lang="scss" scoped>
@import "~@/css/sg";.sgTree {$treeHeaderHeight: 30px;width: 100%;height: 100%;display: flex;flex-wrap: nowrap;flex-direction: column;white-space: nowrap;flex-shrink: 0;flex-grow: 1;position: relative;.tree-header {display: flex;justify-content: space-between;align-items: center;height: $treeHeaderHeight;& > .sg-left {}& > .sg-right {}}.tree-container {position: relative;overflow: auto;box-sizing: border-box;height: calc(100% - #{$treeHeaderHeight});flex-shrink: 0;flex-grow: 1;user-select: none;@include scrollbarHover();/* >>> .tree-container .el-tree .el-tree-node__content {cursor: pointer;} */>>> .el-tree--highlight-current .el-tree-node.is-current > .el-tree-node__content {background-color: #409eff22; // 高亮当前选中节点背景}>>> .el-tree {* {transition: none;}.el-tree-node__children {min-width: max-content; //这样才会出现水平滚动条}.normal-tree-node,.plus-tree-node,.folder-tree-node {& + label:not(.el-checkbox) {/*单行省略号*/overflow: hidden;white-space: nowrap;text-overflow: ellipsis;}flex-shrink: 0;display: block;padding: 0 !important;margin: 0;width: 20px;height: 20px;margin-right: 5px;background: transparent url("~@/../static/img/fileType/folder/folder.svg")no-repeat center / contain;margin-left: 20px;& ~ span:not(.el-icon-loading) {width: 100%;.node-label {height: 40px;display: flex;align-items: center;}}&.expanded {flex-shrink: 0;transform: rotate(0deg);background-image: url("~@/../static/img/fileType/folder/folder-open.svg");}&.is-leaf {background-image: none;}}.normal-tree-node {margin-left: 10px;background-image: url("~@/../static/img/fileType/folder/arrow-right.svg");&.expanded {transform: rotate(90deg);background-image: url("~@/../static/img/fileType/folder/arrow-right.svg");}&.is-leaf {background-image: none;}}.plus-tree-node {margin-left: 10px;background-image: url("~@/../static/img/fileType/folder/plus.svg");&.expanded {background-image: url("~@/../static/img/fileType/folder/minus.svg");}&.is-leaf {background-image: none;}}// 隐藏一级节点的复选框&.hideRootNodeCheckbox > div > .el-tree-node__content .el-checkbox {display: none;}}}
}.tree-el-popover {.el-button {padding-top: 0;padding-bottom: 0;}
}
</style>

 应用

<template><div :class="$options.name"><sgTreev-loading="loading":key="$route.query.BMID + sgTree_fresh":treeData="treeData":data="treeConfigData"@currentChange="currentChange"@addNode="addNode"@removeNode="removeNode":uploadData="{name: `file`,accept: '.xls,.xlsx',actionUrl: `${$d.API_ROOT_URL}/core/column/importColumn`, //批量导入树结构接口actionData: {BMID: $global.getBMID(),PID: `root`,sgLog: `强哥请求来源：${$options.name}导入栏目xls`,},}"@uploadSuccess="uploadSuccess"@uploadError="uploadError"@importError="importError"@downloadTpl="downloadTpl"draggable:allowNodeDrop="allowNodeDrop"@nodeDragEnd="nodeDragEnd"/></div>
</template><script>
import sgTree from "@/vue/components/admin/sgTree";
export default {name: "sgBody",components: {sgTree,},data() {return {sgTree_fresh: false,autoId: 0, //自增编号treeConfigData: {nodeKey: `ID`, //主键props: { label: "MC", isLeaf: "leaf" }, //配置选项iconType: "plus", //节点图标：folder文件夹|normal普通样式|plus加减符号样式text: {addRootButtonText: "添加根目录", //添加根节点按钮文本removeConfirmTitle: "警告！！！", //删除节点提示标题removeConfirmTip: "此操作将永久删除该节点及其下面的子节点，是否继续？", //删除节点提示内容},},treeData: [],loading: false,};},created() {this.initTreeData();},methods: {//初始化数据initTreeData({ d } = {}) {this.$global.获取整棵树的数据({cb: (d) => {this.treeData = d;},});},// 拖拽节点相关方法----------------------------------------allowNodeDrop(draggingNode, dropNode, dropType) {// 只允许拖拽同级别前后排序let isPrevOrNext = dropType === "prev" || dropType === "next";// 同在第一级根节点下let isSameRootLevel =draggingNode.level === dropNode.level && draggingNode.level === 1;// 同在一个节点（非根节点）下let isSameChildLevel =draggingNode.parent &&dropNode.parent &&draggingNode.parent.data &&dropNode.parent.data &&draggingNode.parent.data.ID === dropNode.parent.data.ID;return isPrevOrNext && (isSameRootLevel || isSameChildLevel);},nodeDragEnd(draggingNode, dropNode, dropType, ev) {// 只允许拖拽同级别前后排序let isBeforeOrAfter = dropType === "before" || dropType === "after";if (isBeforeOrAfter) {/* console.log("被拖拽的节点", draggingNode.data.MC, draggingNode.data.PXZ); console.log("停靠的节点", dropNode.data.MC, dropNode.data.PXZ); */let theSameLevelDatas = (dropNode.parent.childNodes || []).map((v) => v.data); // 获取同一级节点数据theSameLevelDatas.forEach((v, i) => (v.PXZ = i)); //重新排序// console.log("拖拽排序", theSameLevelDatas); //这里需要调用后台接口let IDS = theSameLevelDatas.map((v) => v.ID); //排序后的ID顺序数组let data = {IDS,sgLog: `强哥请求来源：${this.$options.name}更改同一层级树节点排序值`,};this.$d.修改节点排序({data,r: {s: (d) => {// console.log("【成功】", d);},},});}},// ----------------------------------------// 获取当前聚焦节点的数据currentChange(d) {console.log(``, d);},// 添加节点addNode({ data, resolve }) {this.$d.新增节点({data: {MC: `新增节点名称(${++this.autoId})`,},doing: {l: { show: () => (this.loading = true), close: () => (this.loading = false) },s: (d) => resolve(d),f: (d) => reject(d), //删除失败},});},// 删除节点removeNode({ node, data, resolve, reject }) {this.$d.删除节点({data: { ID: data.ID },doing: {s: (d) => resolve(d),f: (d) => reject(d), //删除失败},});},updateList(d) {},uploadSuccess(d, f) {this.sgTree_fresh = !this.sgTree_fresh;},uploadError(d, f) {this.$message.error(d.msg);},// 导入失败importError(d, f) {},// 下载导入模板downloadTpl(d) {},},
};
</script>

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