话不多说 先看效果：
多选框：

表格全选：

<template><div><div class="titleLabel"><div class="lineStyle"></div>统计部门</div><div style="display: flex"><el-checkboxstyle="margin-right: 20px":indeterminate="isIndeterminate"v-model="departmentCheckAll"@change="handleCheckAllChange">全选</el-checkbox><el-checkbox-groupv-model="selectedItems"@change="handleCheck(selectedItems)"><el-checkboxv-for="item in department":key="item.id":label="item.id">{{ item.name }}</el-checkbox></el-checkbox-group></div><div><el-tabs v-model="form.pageTab" @tab-click="changeTab"><el-tab-pane name="1"><div slot="label">已关联（{{sumAll['rel']}}）</div></el-tab-pane><el-tab-pane name="0"><div slot="label">未关联（{{sumAll['notRel']}}）</div></el-tab-pane></el-tabs><el-table :data="tableData" stripe border :header-cell-style="{'text-align':'center'}" size="small" ref="table"@selection-change="handleChange" :row-key="row=>row.id"><el-table-column type="selection" :reserve-selection="true" :selectable="selectableAll" align="center"></el-table-column><el-table-column label="单位名称" align="center" prop="name"></el-table-column><el-table-column label="统一社会信用代码" align="center"></el-table-column></el-table><br><!-- 分页--><el-form :inline="true"><el-form-item ><div v-if="where"><span v-if="!selectAll">已选：{{ relIds.length }}/{{ total }}</span><span v-else> 已选：{{ total }}/{{ total }} </span><span><el-buttonstyle="margin-left: 10px"type="primary"v-if="!selectAll"plainsize="small"@click="all()">全选所有</el-button><el-buttonstyle="margin-left: 10px"type="primary"v-elseplainsize="small"@click="all()">取消全选</el-button></span></div></el-form-item><el-form-item style="float: right"><!-- 分页--><el-paginationalign="right"backgroundlayout="prev, pager, next,total":current-page.sync="form['pageNum']":page-size.sync="form['pageSize']"@current-change="jump"@size-change="resize":total="total"></el-pagination></el-form-item></el-form></div></el-dialog></div>
</template><script>
import { departmentList } from "@/api/assets/assetArchives";
export default {data() {return {form: {},dialogVisible: false,isIndeterminate: false,department: [], //部门departmentCheckAll: false,selectedItems: [],relIds:[],total:0,selectAll:false, //表格是否全选};},methods: {show() {this.departmentList();this.dialogVisible = true;},departmentList() {departmentList({ type: "INNER", pagination: false }).then((data) => {this.department = data["items"];// this.selectedItems = [132,51] //回显选中的部门(到时候应该是把check为true的id筛选出来)});},handleCheck(value) {let checkedCount = value.length;this.departmentCheckAll = checkedCount === this.department.length;this.isIndeterminate =checkedCount > 0 && checkedCount < this.department.length;},handleCheckAllChange(val) {this.selectedItems = val? this.department.map((item) => {return item.id;}): [];this.isIndeterminate = false;},//选择handleChange(val) {let arr = []val.map(item => {arr.push(item.id)})this.relIds = arr;},//全选all() {let title = this.selectAll ? "取消默认全选" : "默认全选";this.$confirm("此操作将" + title + "所有，是否确认继续？", "提示", {confirmButtonText: "确定",cancelButtonText: "取消",type: "warning",}).then(() => {// 全选表格中的所有数据this.selectAll = !this.selectAll;if (this.selectAll) this.toggleSelection(this.tableData);else this.toggleSelection();});},//点击全选时  默认不能进行修改selectableAll() {return !this.selectAll;},//选中状态标志toggleSelection(rows) {if (this.relIds) this.$refs.table.clearSelection();if (rows) {rows.forEach((row) => {this.$refs.table.toggleRowSelection(row);});} else {this.$refs.table.clearSelection();}},//分页情况jump(e) {this.form.pageNum = e;this.list();},resize(e) {this.form.pageSize = e;this.list();},},
};
</script>