最近要用Vue+ElementUI实现这种表格样式，因为也是第一次对el-table做这种处理，所以并不知晓是不是有更优的解决方案。把自己的代码放上来，欢迎大家提供更简单的实现方法哈。
我的方案有些繁琐，先通过header-cell-class-name设置class名，然后在mounted里通过原生Js获取到dom节点，setAttribute实现；
<template>
<div class=‘tablePage‘>
<el-table
:data="tableData"
border
style="width: 100%"
:header-cell-class-name="headerCrossRow"
:span-method="moreRowsToOneRow"
>
<el-table-column header-align="center" label="辅导班学生汇总期末考试表">
<el-table-column header-align="center" align="center" type="index" label="标识"></el-table-column>
<el-table-column header-align="center" align="center" prop="studentNo" label="学号"></el-table-column>
<el-table-column header-align="center" align="center" label="学生信息">
<el-table-column header-align="center" align="center" prop="schoolName" label="所属学校"></el-table-column>
<el-table-column header-align="center" label="基本信息">
<el-table-column header-align="center" align="center" prop="studentName" label="姓名"></el-table-column>
<el-table-column header-align="center" align="center" prop="studentAge" label="年龄"></el-table-column>
</el-table-column>
</el-table-column>
<el-table-column header-align="center" label="考试结果">
<el-table-column header-align="center" align="center">
<el-table-column header-align="center" align="center" prop="studentScore" label="成绩"></el-table-column>
</el-table-column>
<!-- <el-table-column header-align="center" align="center" prop="testLevel" label="等级"></el-table-column> -->
</el-table-column>
</el-table-column>
</el-table>
</div>
</template>
<script>
let me;
export default {
data() {
return {
tableData: [
{
schoolName: ‘A小学‘,
studentNo: ‘2018001‘,
studentName: ‘Jack‘,
studentScore: 92,
testLevel: ‘优秀‘,
studentAge: 17
},
{
schoolName: ‘A小学‘,
studentNo: ‘2018002‘,
studentName: ‘Lily‘,
studentScore: 99,
testLevel: ‘优秀‘,
studentAge: 16
},
{
schoolName: ‘A小学‘,
studentNo: ‘2018003‘,
studentName: ‘Sony‘,
studentScore: 58,
testLevel: ‘不及格‘,
studentAge: 18
},
{
schoolName: ‘B小学‘,
studentNo: ‘2018004‘,
studentName: ‘Tom‘,
studentScore: 74,
testLevel: ‘良好‘,
studentAge: 16
},
{
schoolName: ‘B小学‘,
studentNo: ‘2018005‘,
studentName: ‘Jackie‘,
studentScore: 92,
testLevel: ‘优秀‘,
studentAge: 16
},
{
schoolName: ‘B小学‘,
studentNo: ‘2018006‘,
studentName: ‘Joe‘,
studentScore: 99,
testLevel: ‘优秀‘,
studentAge: 16
},
{
schoolName: ‘B小学‘,
studentNo: ‘2018007‘,
studentName: ‘Kobe‘,
studentScore: 58,
testLevel: ‘不及格‘,
studentAge: 17
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018008‘,
studentName: ‘Tomcat‘,
studentScore: 74,
testLevel: ‘良好‘,
studentAge: 17
},
{
schoolName: ‘B小学‘,
studentNo: ‘2018009‘,
studentName: ‘Trump‘,
studentScore: 92,
testLevel: ‘优秀‘,
studentAge: 18
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018010‘,
studentName: ‘Lily‘,
studentScore: 49,
testLevel: ‘不及格‘,
studentAge: 17
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018011‘,
studentName: ‘Sony‘,
studentScore: 58,
testLevel: ‘不及格‘,
studentAge: 17
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018012‘,
studentName: ‘Tom‘,
studentScore: 74,
testLevel: ‘良好‘,
studentAge: 17
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018013‘,
studentName: ‘Jack‘,
studentScore: 52,
testLevel: ‘不及格‘,
studentAge: 17
},
{
schoolName: ‘C小学‘,
studentNo: ‘2018014‘,
studentName: ‘Lily‘,
studentScore: 99,
testLevel: ‘优秀‘,
studentAge: 17
},
]
}
},
mounted(){
me = this;
var timer = setInterval(()=>{
console.log(‘计时器10ms执行一次，一旦找到目标节点即停止‘)
var setCrossRowDom1 = document.getElementsByClassName(‘setCrossRow1‘);
var setCrossRowDom2 = document.getElementsByClassName(‘setCrossRow2‘);
var setCrossColDom1 = document.getElementsByClassName(‘setCrossCol1‘);
var setCrossColDom2 = document.getElementsByClassName(‘setCrossCol2‘);
if(setCrossRowDom1.length > 0 && setCrossRowDom2.length > 0 && setCrossColDom1.length > 0 && setCrossColDom2.length > 0){
setCrossRowDom1[0].setAttribute(‘rowspan‘, 2)
setCrossRowDom2[0].setAttribute(‘style‘, ‘display: none;‘)
setCrossColDom1[0].setAttribute(‘colspan‘, 2)
setCrossColDom2[0].setAttribute(‘style‘, ‘display: none;‘)
clearInterval(timer);
timer = null;
}
}, 10)
},
methods: {
// 一加载就给表头设置class，通过js设置表头里的单元格合并
headerCrossRow({rowIndex, column}){
if(rowIndex === 1 && column.label === ‘考试结果‘){
return ‘setCrossRow1‘;
} else if (rowIndex === 2 && !column.label) {
return ‘setCrossRow2‘;
} else if (column.label === ‘标识‘) {
return ‘setCrossCol1‘;
} else if (column.label === ‘学号‘) {
return ‘setCrossCol2‘;
}
},
moreRowsToOneRow({ rowIndex, columnIndex }){
// 学校是不同学生可能共同拥有的属性，所以需要合并。
// 其他属性不应该合并，比如成绩，即使成绩相等，也不应该合并为同一个单元格
if (columnIndex === 2) {
// 遍历各行 看是要合并行、合并几行，还是隐藏
// 比如第7行开始要合并3行，那么第8行和第9行就得隐藏，要不然会右移占用其他单元格
for (var i of Array.from(me.tableData.keys())) {
if(rowIndex === i){
return me.heBingRowOfColumn2(i)//计算{colspan: X, rowspan: Y}的值
}
}
}
},
heBingRowOfColumn2(i){
var itemList = me.tableData.map(item=>{
return item.schoolName
})
// 先拿到学校列表，本示例中拿到的数组为：
// ["A小学", "A小学", "A小学", "B小学", "B小学", "B小学", "B小学", "C小学", "B小学", "C小学", "C小学", "C小学", "C小学", "C小学"]
// 第一行，没有上一行，所以要单独处理下
var returnObj = null;
if(i == 0){
console.log(`${itemList[i]}从下标${i}开始出现了${countShowTimes(itemList, i)}次`)
returnObj = { colspan: 1, rowspan: countShowTimes(itemList, i) }
} else if (i >= 1) {// 第二行开始：
if(itemList[i] == itemList[i-1]){// 如果和上面一行值相等，就隐藏
returnObj = { colspan: 0, rowspan: 0 }
} else {// 如果和上面一行值不相等
console.log(`${itemList[i]}从第${i}开始出现了${countShowTimes(itemList, i)}次`)
returnObj = { colspan: 1, rowspan: countShowTimes(itemList, i) }
}
}
return returnObj;//把合并的列数 行数返回给span-method的方法
// 计算连续出现的次数，然后合并
// 一旦有不同的值，则需要重新计数
function countShowTimes (itemList, i) {
var count = 1;
// 如果一进来就是最后一个元素，那肯定只能出现一次，直接return
if(i == (itemList.length-1)){
return 1;
}
for (var n=i+1;n<itemList.length;n++) {// 从i之后的那个元素开始遍历，一直到最后一个元素
if (itemList[n] === itemList[n-1]) {// 判断是否和前一个值相等，顺便处理一下边界值
count++;
if(n == (itemList.length-1)){//如果此时已经判断的是最后一个元素了，就可以return了
return count;
}
} else {// 如果出现不同的值了。或者如果到最后一个，再往后就没元素了，可以直接返回count了
return count;
}
}
}
},
},
}
</script>
<style lang="scss" scoped>
.tablePage {
width: 100vw;
height: 100vh;
overflow: auto;
}
</style>
