JeecgBoot BasicTable合并行操作，官方文檔信息太少了

// 列表數(shù)據(jù)
export const columns: BasicColumn[] = [
  {
    title: '階段',
    align: 'center',
    dataIndex: 'projectStage',
  },
  {
    title: '類別',
    align: 'center',
    dataIndex: 'emissionsType',
  },
  ....
]

//  表格合并
export const getSpanArr = (tableData, itemProperty) => {
  if (tableData.length === 0) {
    return false;
  }

  const spanArr = [];
  let pos;
  for (let i = 0; i < tableData.length; i++) {
    if (i === 0) {
      spanArr.push(1);
      pos = 0;
    } else {
      // 判斷當(dāng)前元素與上一個元素是否相同 相同則加 1。。。這里可以根據(jù)實際需求調(diào)整。可能多列相等時才合并
      if (tableData[i][itemProperty] && tableData[i][itemProperty] === tableData[i - 1][itemProperty]) {
        spanArr[pos] += 1;
        spanArr.push(0);
      } else {
        spanArr.push(1);
        pos = i;
      }
    }
  }

  return spanArr;
};

import { ref, computed } from 'vue';
import { getSpanArr } from './jsfile.fun.js';
import { columns } from './jsfile.data.js';
 // 表格列設(shè)置單元格合并
  const newColumns = computed(() => {
      // 獲取表格數(shù)據(jù)
    const tableDataSource = getDataSource();
    // 設(shè)置需要合并的列
    const needTomergeColumnsIndex = ['projectStage', 'emissionsType'];
    let newColumnsData = columns.map((item) => {
      if (needTomergeColumnsIndex.includes(item.dataIndex)) {
        // 計算合并單元格數(shù)量
        const spanArr = getSpanArr(tableDataSource, item.dataIndex);
        item.customCell = (record, rowIndex, column) => {
          // 設(shè)置單元格合并數(shù)量
          return { rowSpan: spanArr[rowIndex] };
        };
      }
      return item;
    });
    return newColumnsData;
  });

//注冊table數(shù)據(jù)
  const { prefixCls, tableContext, onExportXls, onImportXls } = useListPage({
    tableProps: {
      title: '工單工序轉(zhuǎn)移_工單工序',
      api: list,
      columns: newColumns, //---換成新的colums即可
      canResize:false,
      useSearchForm: false,
      actionColumn: {
        width: 120,
        fixed: 'right',
      },
      beforeFetch: async (params) => {
        let rangerQuery = await setRangeQuery();
        return Object.assign(params, rangerQuery);
      },
    },
    exportConfig: {
      name: "工單工序轉(zhuǎn)移_工單工序",
      url: getExportUrl,
      params: queryParam,
    },
      importConfig: {
        url: getImportUrl,
        success: handleSuccess
      },
  });