el-table动态生成多级表头的表格（js + ts）

展示形式：
在这里插入图片描述
详细代码：
（js）

<template><div><el-table :data="tableData" style="width: 100%"><el-table-column label="题目信息" align="center"><el-table-column prop="questionName" label="题目名称"></el-table-column><el-table-column prop="fullScore" label="满分"></el-table-column><el-table-column prop="gradeAvg" label="年级均分"></el-table-column><el-table-column prop="gradeScoreRate" label="年级分数线"></el-table-column></el-table-column><el-table-column v-for="classInfo in classHeaders" :key="classInfo.classScoreId"><template #header>{{ classInfo.className }}</template><el-table-column label="班级均分" align="center"><template #default="{ row }">{{ getCellValue(row, classInfo, 'classAvg') }}</template></el-table-column><el-table-column label="班级分数线" align="center"><template #default="{ row }">{{ getCellValue(row, classInfo, 'classScoreRate') }}</template></el-table-column></el-table-column></el-table></div></template><script>import { reactive } from 'vue';export default {data() {return {tableData: reactive([{id: 1,questionId: 1,questionName: '填空题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 7,classScoreRate: 0.7}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {id: 2,questionId: 2,questionName: '选择题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {id: 3,questionId: 3,questionName: '判断题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {id: 4,questionId: 4,questionName: '填空题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {id: 5,questionId: 5,questionName: '简答题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}
])  // 你的数据结构};},computed: {classHeaders() {// 假设每个问题类型下的班级信息结构是一样的，取第一个问题类型下的班级信息来生成表头const firstQuestion = this.tableData[0];if (firstQuestion) {return firstQuestion.questionClassVOList;}return [];}},methods: {getCellValue(row, classInfo, prop) {const classData = row.questionClassVOList.find(item => item.classScoreId === classInfo.classScoreId);return classData ? classData[prop] : '';}}};</script><style>/* 样式可以根据你的需求进行调整 */</style>

（ts）

<template><div><el-table :data="tableData" style="width: 100%"><el-table-column label="题目信息" align="center"><el-table-column prop="questionName" label="题目名称"></el-table-column><el-table-column prop="fullScore" label="满分"></el-table-column><el-table-column prop="gradeAvg" label="年级均分"></el-table-column><el-table-column prop="gradeScoreRate" label="年级分数线"></el-table-column></el-table-column><el-table-column v-for="classInfo in classHeaders" :key="classInfo.classScoreId"><template #header>{{ classInfo.className }}</template><el-table-column label="班级均分" align="center"><template #default="{ row }">{{ getCellValue(row, classInfo, 'classAvg') }}</template></el-table-column><el-table-column label="班级分数线" align="center"><template #default="{ row }">{{ getCellValue(row, classInfo, 'classScoreRate') }}</template></el-table-column></el-table-column></el-table></div>
</template><script setup lang="ts">
import { ref, reactive, computed } from 'vue';interface ClassInfo {classScoreId: number;className: string;classAvg: number;classScoreRate: number;
}interface QuestionClass {questionClassVOList: ClassInfo[];
}interface TableRow extends QuestionClass {questionId: number;questionName: string;fullScore: number;gradeAvg: number;gradeScoreRate: number;
}const tableData = reactive<TableRow[]>([{questionId: 1,questionName: '填空题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 7,classScoreRate: 0.7}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {questionId: 2,questionName: '选择题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {questionId: 3,questionName: '判断题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {questionId: 4,questionName: '填空题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}, {questionId: 5,questionName: '简答题',fullScore: 10,gradeAvg: 8,gradeScoreRate: 0.8,questionClassVOList: [{classScoreId: 1,className: '一班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 2,className: '二班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 3,className: '三班',classAvg: 8,classScoreRate: 0.8}, {classScoreId: 4,className: '四班',classAvg: 8,classScoreRate: 0.8}]}
])const classHeaders = computed<ClassInfo[]>(() => {const firstQuestion = tableData[0];if (firstQuestion) {return firstQuestion.questionClassVOList;}return [];
});const getCellValue = (row: TableRow, classInfo: ClassInfo, prop: keyof ClassInfo) => {const classData = row.questionClassVOList.find(item => item.classScoreId === classInfo.classScoreId);return classData ? classData[prop] : '';
};
</script><style lang="scss" scoped>
</style>