首先是vue代码

<template>
  <div id="body-container"
       style="position: absolute">

    <div class="box-container">
      <div class="lsb-table-box" >
        <div class="table-container" id="lsb-table">
        </div>
      </div>
    </div>
  </div>

</template>

然后是js方法

/**
 * 渲染表格
 */
function tableRenderCs() {

    const data=[{
        "one": "测试1",
        "two": "测试2",
        "three": "测试3",
        "four": "测试4",
        "five": "测试5",
        "six": "测试6",
        "seven": "测试7",
        "eight": "测试8",
        "nine": "测试9"
    },{
        "one": "测试1",
        "two": "测试2",
        "three": "测试3",
        "four": "测试4",
        "five": "测试5",
        "six": "测试6",
        "seven": "测试7",
        "eight": "测试8",
        "nine": "测试9"
    },{
        "one": "测试1",
        "two": "测试2",
        "three": "测试3",
        "four": "测试4",
        "five": "测试5",
        "six": "测试6",
        "seven": "测试7",
        "eight": "测试8",
        "nine": "测试9"
    }]

    let html = '<table class="table-wj JZ-A" border="1" cellspacing="0">' +
        '<thead>' +
        '<tr>' +
        '<th rowspan="2" colspan="3">第一列</th>' +
        '<th rowspan="2" colspan="1" style="width: 50px;">第二列</th>' +
        '<th rowspan="2" colspan="1" style="width: 100px;">第三列</th>' +
        '<th rowspan="2" colspan="1" style="width: 50px;">第四列</th>' +
        '<th rowspan="2" colspan="1" style="width: 80px;">第五列</th>' +
        '<th rowspan="1" colspan="3">第六列</th>' +
        '</tr>' +
        '<tr>' +
        '<th colspan="1" style="width: 50px;">第六列的第一列</th>' +
        '<th colspan="1" style="width: 90px;">第六列的第二列</th>' +
        '</tr>' +
        '</thead>' +
        '<tbody>';

    for (let i = 0; i < data.length; i++) {
        const item = data[i];

        html +=
            `<tr>` +
            `<td>${item.one}</td>` +
            `<td>${item.two}</td>` +
            `<td>${item.three}</td>` +
            `<td>${item.four}</td>` +
            `<td>${item.five}</td>` +
            `<td>${item.six}</td>` +
            `<td>${item.seven}</td>` +
            `<td>${item.eight}</td>` +
            `<td>${item.nine}</td>` +
            `</tr>`;
    }

    html += '</tbody></table>';

    let _$ = $(".lsb-table-box .table-container");
    _$.append(html);

    mergeColumns();//调用合并表格方法
}

/**
 * 执行合并逻辑
 */
function mergeColumns() {
    let $table = $('table.table-wj');
    let $rows = $table.find('tbody tr');

	const numCols = $rows.eq(0).find('td').length;//考虑全部列
    //const numCols = Math.min(3, $rows.eq(0).find('td').length); // 仅考虑前三列

    // 遍历每列
    for (let col = 1; col <= numCols; col++) {
        let $currentColumn = $table.find(`td:nth-child(${col})`);
        let prevContent = null;
        let rowspan = 1;

        for (let i = 0; i < $currentColumn.length; i++) {
            let $currentCell = $($currentColumn[i]);
            let currentContent = $currentCell.text();

            if (currentContent === prevContent) {
                rowspan++;
                $currentCell.addClass('hidden');
            } else {
                if (rowspan > 1) {
                    $currentColumn.eq(i - rowspan).attr('rowspan', rowspan);
                }
                prevContent = currentContent;
                rowspan = 1;
            }
        }

        if (rowspan > 1) {
            $currentColumn.eq($currentColumn.length - rowspan).attr('rowspan', rowspan);
        }
    }

    // 清除被隐藏的单元格
    $table.find('.hidden').remove();
}

const numCols这里给出了两种合并表格的逻辑，第一个是只会对前三列执行合并逻辑，而第二个会对所有列执行合并逻辑。下面是两种逻辑的合并效果图。