注意：const fields = 是要合并的字段

一、vxe-table合并行数据

1.代码

      <vxe-table
        border
        resizable
        height="500"
        :scroll-y="{enabled: false}"
        :span-method="mergeRowMethod"
        :data="tableData3"
      >
        <vxe-column type="seq" width="60" />
        <vxe-column field="key" title="设备名称" />
        <vxe-column field="num" title="Num" />
        <vxe-column field="content" title="Translate" />
        <vxe-column field="language" title="Language">
          <template v-slot="{ row }">
            <div @click="getRow(row)">{{ row.language }}</div>
          </template>
        </vxe-column>
        <vxe-column field="key" title="操作">
          <template v-slot="{ row }">
            <div @click="getRow(row)">获取数据</div>
          </template>
        </vxe-column>
      </vxe-table>







    tableData3: []







    getDataList2() {
      this.tableData3 = [
        { id: 10001, key: 'app.label.name', num: 1, content: '名称', language: '1' },
        { id: 10002, key: 'app.label.name', num: 1, content: 'Name', language: '2' },
        { id: 10003, key: 'app.label.name', num: 1, content: '性别', language: '3' },
        { id: 10004, key: 'app.label.name', num: 1, content: 'Sex', language: '4' },
        { id: 10005, key: 'app.label.age', num: 3, content: '年龄', language: '5' },
        { id: 10006, key: 'app.label.age', num: 3, content: 'Age', language: '6' },
        { id: 10007, key: 'app.label.role', num: 4, content: '角色', language: '7' },
        { id: 10008, key: 'app.label.role', num: 4, content: 'Role', language: '8' },
        { id: 10009, key: 'app.label.address', num: 5, content: '地址', language: '9' },
        { id: 10010, key: 'app.label.address', num: 5, content: 'Address', language: '10' },
        { id: 10011, key: 'app.label.nickname', num: 6, content: '昵称', language: '11' },
        { id: 10012, key: 'app.label.nickname', num: 6, content: 'Nickname', language: '12' }
      ]
    },
    // 通用行合并函数（将相同多列数据合并为一行）
    mergeRowMethod({ row, _rowIndex, column, visibleData }) {
      console.log(row, _rowIndex, column, visibleData)
      const fields = ['key', 'num']
      const cellValue = row[column.field]
      if (cellValue && fields.includes(column.field)) {
        const prevRow = visibleData[_rowIndex - 1]
        let nextRow = visibleData[_rowIndex + 1]
        if (prevRow && prevRow[column.field] === cellValue) {
          return { rowspan: 0, colspan: 0 }
        } else {
          let countRowspan = 1
          while (nextRow && nextRow[column.field] === cellValue) {
            nextRow = visibleData[++countRowspan + _rowIndex]
          }
          if (countRowspan > 1) {
            return { rowspan: countRowspan, colspan: 1 }
          }
        }
      }
    },
    getRow(row) {
      console.log(row)
    },

二、使用element-plus的el-table动态合并行

参考了vxe-table的处理返参方式得到的

2.代码

<template>
  <div>
    <pre>{{ tableData }}</pre>
    <div>手动合并</div>
    <el-table :data="tableData" :span-method="arraySpanMethod" border style="width: 100%">
      <el-table-column prop="id" label="ID" width="180" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="amount1" sortable label="Amount 1" />
      <el-table-column prop="amount2" sortable label="Amount 2" />
      <el-table-column prop="amount3" sortable label="Amount 3" />
    </el-table>

    <div style="margin-top: 100px;">通过计算 动态合并相同行</div>
    <el-table :data="tableData" :span-method="objectSpanMethod" border style="width: 100%; margin-top: 0px">
      <el-table-column prop="id" label="ID" width="180" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="amount1" label="Amount 1" />
      <el-table-column prop="amount2" label="Amount 2" />
      <el-table-column prop="amount3" label="Amount 3" />
    </el-table>
  </div>
</template>

<script lang="ts" setup>
import type { TableColumnCtx } from 'element-plus'

interface User {
  id: string
  name: string
  amount1: string
  amount2: string
  amount3: number
}

interface SpanMethodProps {
  row: User
  column: TableColumnCtx<User>
  rowIndex: number
  columnIndex: number
}

const arraySpanMethod = ({
  row,
  column,
  rowIndex,
  columnIndex,
}: SpanMethodProps) => {
  if (rowIndex % 2 === 0) {
    if (columnIndex === 0) {
      return [1, 2]
    } else if (columnIndex === 1) {
      return [0, 0]
    }
  }
}

const objectSpanMethod = ({
  row,
  column,
  rowIndex,
  columnIndex,
}: SpanMethodProps) => {
  console.log(row,
    column,
    rowIndex,
    columnIndex,);

  // if (columnIndex === 0) {
  //   if (rowIndex % 2 === 0) {
  //     return {
  //       rowspan: 2,
  //       colspan: 1,
  //     }
  //   } else {
  //     return {
  //       rowspan: 0,
  //       colspan: 0,
  //     }
  //   }
  // }

  const fields = ['id', 'name']
  const cellValue = row[column.property]
  if (cellValue && fields.includes(column.property)) {
    const prevRow = tableData[rowIndex - 1]
    let nextRow = tableData[rowIndex + 1]
    if (prevRow && prevRow[column.property] === cellValue) {
      return { rowspan: 0, colspan: 0 }
    } else {
      let countRowspan = 1
      while (nextRow && nextRow[column.property] === cellValue) {
        nextRow = tableData[++countRowspan + rowIndex]
      }
      if (countRowspan > 1) {
        return { rowspan: countRowspan, colspan: 1 }
      }
    }
  }

}

const tableData: User[] = [
  {
    id: '11111',
    name: 'Tom',
    amount1: '234',
    amount2: '3.2',
    amount3: 10,
  },
  {
    id: '11111',
    name: 'Tom',
    amount1: '165',
    amount2: '4.43',
    amount3: 12,
  },
  {
    id: '12987124',
    name: 'Tom',
    amount1: '324',
    amount2: '1.9',
    amount3: 9,
  },
  {
    id: '12987125',
    name: 'Jack',
    amount1: '621',
    amount2: '2.2',
    amount3: 17,
  },
  {
    id: '12987126',
    name: 'Jack',
    amount1: '539',
    amount2: '4.1',
    amount3: 15,
  },
]
</script>