node使用xlsx导入导出excel

1.安装和引入xlsx

安装  npm install xlsx

 引入：let xlsx = require('xlsx');

2.读取excel数据
function readFile(file) {
    let f = file.raw;
    let reader = new FileReader();
    reader.readAsBinaryString(f);
    reader.onload = function (e) {
      let data = e.target.result;
      let wb = xlsx.read(data, { type: 'binary' });
      let json = xlsx.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
      console.log(json)
    };
  };

3.导出excel
   function exportExcel(result){
    let sheet = xlsx.utils.json_to_sheet(result);
      let keys = Object.keys(sheet).sort();
      let ref = keys[1] + ':' + keys[keys.length-1];
      let workbook = {
        SheetNames:['nodejs-sheetname'],
        Sheets:{'nodejs-sheetname':Object.assign({},sheet,{'!ref':ref})}//nodejs-sheetname 为sheet名字
      }
      xlsx.writeFile(workbook,filepath);
}


导入和导出excel多sheet道理是一样的，按照上面的即可！