#使用提供的:span-method="handleSpanMethod"方法进行合并处理

handleSpanMethod({row, column, rowIndex, columnIndex}) {
  if (columnIndex === 0) {
    const _row = this.filterData(this.tableData, columnIndex).one[rowIndex];
    const _col = _row > 0 ? 1 : 0;
    return {
      rowspan: _row, //合并行数
      colspan: _col, //合并列数
    }
  }
},
  filterData(arr, colIndex) {
    let spanOneArr = [];
    let concatOne = 0;
    arr.forEach((item, index) => {
      if (index === 0) {
        spanOneArr.push(1);
      } else {
        if (colIndex === 0) {
          if (item.nodeParentName === arr[index - 1].nodeParentName) {
            spanOneArr[concatOne] += 1;
            spanOneArr.push(0);
          } else {
            spanOneArr.push(1);
            concatOne = index;
          }
        }
      }
    });
    return {
      one: spanOneArr,
    };
  }