vue3使用Ant-Design组件a-table表格实现多层表头及合并单元格

效果图：

多层表头： 通过columns中的children来设置多个值实现多层表头；

表身单元格合并： 从图中可以看出第一列（班次）和最后一列（值班员签名）需要表格行合并单元格（通过表格的某个字段中相同值进行合并）；

整体代码如下：

<template>
    <div class="tableContent">
        <a-table :columns="columns" :data-source="dataSource" bordered size="small" :pagination="false"
            :scroll="{ y: 640 }">
        </a-table>
    </div>
</template>
<script lang="ts" setup>
import { ref } from 'vue';
const columns = [
    {
        title: '班次',
        dataIndex: 'tableTime',
        key: 'tableTime',
        width: 50,
        align: 'center',
        customCell: ({ rowSpan }) => {
            return {
                rowSpan: rowSpan
            }
        }
    },
    {
        title: '时间',
        dataIndex: 'time',
        key: 'time',
        width: 100,
        align: 'center'
    },
    {
        title: '直供井',
        children: [
            {
                title: 'PH',
                dataIndex: 'PH1',
                key: 'PH1',
                width: 80,
                align: 'center'
            },
            {
                title: '浊度（NTU）',
                dataIndex: 'turbidity1',
                key: 'turbidity1',
                width: 80,
                align: 'center'
            },
            {
                title: '电导率(μs/cm)',
                dataIndex: 'conductivity1',
                key: 'conductivity1',
                width: 80,
                align: 'center'
            },
            {
                title: '温度（°C）',
                dataIndex: 'temperature1',
                key: 'temperature1',
                width: 80,
                align: 'center'
            },
            {
                title: '余氯（mg/L）',
                dataIndex: 'residual1',
                key: 'residual1',
                width: 80,
                align: 'center'
            },
        ],
    },
    {
        title: '出厂水',
        children: [
            {
                title: 'PH',
                dataIndex: 'PH2',
                key: 'PH2',
                width: 80,
                align: 'center'
            },
            {
                title: '浊度（NTU）',
                dataIndex: 'turbidity2',
                key: 'turbidity2',
                width: 80,
                align: 'center'
            },
            {
                title: '电导率(μs/cm)',
                dataIndex: 'conductivity2',
                key: 'conductivity2',
                width: 80,
                align: 'center'
            },
            {
                title: '温度（°C）',
                dataIndex: 'temperature2',
                key: 'temperature2',
                width: 80,
                align: 'center'
            },
            {
                title: '余氯（mg/L）',
                dataIndex: 'residual2',
                key: 'residual2',
                width: 80,
                align: 'center'
            },
        ],
    },
    {
        title: '管网末梢水',
        children: [
            {
                title: 'PH',
                dataIndex: 'PH3',
                key: 'PH3',
                width: 80,
                align: 'center'
            },
            {
                title: '浊度（NTU）',
                dataIndex: 'turbidity3',
                key: 'turbidity3',
                width: 80,
                align: 'center'
            },
            {
                title: '电导率(μs/cm)',
                dataIndex: 'conductivity3',
                key: 'conductivity3',
                width: 80,
                align: 'center'
            },
            {
                title: '温度（°C）',
                dataIndex: 'temperature3',
                key: 'temperature3',
                width: 80,
                align: 'center'
            },
            {
                title: '余氯（mg/L）',
                dataIndex: 'residual3',
                key: 'residual3',
                width: 80,
                align: 'center'
            },
        ],
    },
    {
        title: '值班员签名',
        dataIndex: 'signature',
        key: 'signature',
        width: 100,
        align: 'center',
        customCell: ({ rowSpan }) => {
            return {
                rowSpan: rowSpan
            }
        }
    },
];
const dataSource = ref([
    { tableTime: '早班', time: 1, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '张三' },
    { tableTime: '早班', time: 2, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '张三' },
    { tableTime: '中班', time: 9, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '李四' },
    { tableTime: '中班', time: 10, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '李四' },
    { tableTime: '中班', time: 11, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '李四' },
    { tableTime: '晚班', time: 17, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '王五' },
    { tableTime: '晚班', time: 18, PH1: 7.61, turbidity1: 0.32, conductivity1: 671.61, temperature1: 23.73, residual1: 0.02, PH2: 7.61, turbidity2: 0.32, conductivity2: 671.61, temperature2: 23.73, residual2: 0.02, PH3: 7.61, turbidity3: 0.32, conductivity3: 671.61, temperature3: 23.73, residual3: 0.02, signature: '王五' },
])

//合并单元格方法
function groupData(data) {
    let currentTableTime = '';
    let currentSignature = '';
    return data.map((item, index) => {
        if (currentTableTime !== item.tableTime || currentSignature !== item.signature) {
            currentTableTime = item.tableTime;
            currentSignature = item.signature;
            let rowSpan = 0;
            for (let i = 0; i < data.length; i++) {
                if (i >= index) {
                    const currentItem = data[i];
                    if (
                        currentTableTime === currentItem.tableTime && currentSignature === currentItem.signature
                    ) {
                        rowSpan += 1;
                    } else {
                        break;
                    }
                }
            }
            item.rowSpan = rowSpan;
        } else {
            item.rowSpan = 0;
        }

        return item;
    });
}
groupData(dataSource.value)
</script>
<style lang="less" scoped></style>