vue elementUI table 自定义表头和行合并的实例代码

<el-table
     :data="TableData"
     :height="tableHeight"
     :row-class-name="showEmergencyLine"
     border
     element-loading-spinner="el-icon-loading"
     element-loading-text="拼命加载中"
     @selection-change="handleSelectionChange"
     v-loading.lock="TableLoading"
     @header-dragend="changeHeaderWidth"
    >
     <el-table-column
      v-for="header in headerDatas"
      :prop="header.type"
      :key="header.label"
      :label="header.label"
      :width="header.width"
      :minWidth="header.minWidth"
      :itemname="header.mid"
      :align="header.align"
      header-align="center"
     >
     <template slot-scope="scope">
     <div
      v-else
     >{{scope.row[scope.column.property]}}</div>
     </template>
     </el-table-column>
</el-table>

<el-table
   :data="tableData"
   :span-method="objectSpanMethod"
   highlight-current-row
   element-loading-spinner="el-icon-loading"
   element-loading-text="拼命加载中"
   v-loading.lock="mainTableLoading"
   border
   style="width: 100%; margin-top: 25px"
  >
</el-table>

  arraySpanMethod({ row, column, rowIndex, columnIndex }) {
    if (rowIndex % 2 === 0) {//偶数行
     if (columnIndex === 0) {//第一列
      return [1, 2];//1合并一行，2占两行
     } else if (columnIndex === 1) {//第二列
      return [0, 0];//0合并0行，0占0行
     }
    }
   },

   objectSpanMethod({ row, column, rowIndex, columnIndex }) {
    if (columnIndex === 0) {
     if (rowIndex % 2 === 0) {
      return {
       rowspan: 2,//合并的行数
       colspan: 1//合并的列数，设为０则直接不显示
      };
     } else {
      return {
       rowspan: 0,
       colspan: 0
      };
     }
    }
   }