前端 excel 表格导出

传统的表格导出是直接获取数据，传表头，数据，自动下载表格。Blob.js 和 Export2Excel.js

 如果要导出这样的表格，那么需要重新写一个方法，核心在于  { s: { r: 行开始, c:列开始  }, e: { r: 行结束, c: 列开始  } }

const mergesMap = reactive({
  spankeys: ['department_name', 'role_name', 'user_name']
})

const getTableMerges = (params: Record<string, any>) => {
  const { mergesMap, dataList, column } = params
  const _merges = []
  dataList.map((v: any, index: number) => {
    for (let _key in mergesMap) {
      if (v[_key]) {
        const spankeys = mergesMap[_key]
        let obj = {}
        for (let key in v) {
          spankeys.map((k: any) => {
            if (k === key) {
              const _rowIndex = index
              let rEnd = _rowIndex + v[_key]
              const _index = column.findIndex((v: any) => v.prop === key)
              obj = {
                e: { r: rEnd, c: _index },
                s: { r: index + 1, c: _index }
              }
              _merges.push(obj)
            }
          })
        }
      }
    }
  })
  return _merges
}

　　只要把  merges 传进去就可以了

export function export_json_to_excel(th: any, jsonData: any, defaultTitle: any, merges?: any) {

  /* original data */

  var data = jsonData;
  data.unshift(th);
  var ws_name = "SheetJS";

  const wb: any = {
    SheetNames: [],
    Sheets: {}
  }
  const ws: any = sheet_from_array_of_arrays(data);

  ws['!merges'] = merges || []
  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;

  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });
  (window as any).saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), `${defaultTitle ? defaultTitle : '列表'}.xlsx`)
}