angular8 导出excel文件

angular

 

package

1、xlsx　　

　　npm install xlsx --save

2、file-saver

　　npm install file-saver --save

　　npm install @types/file-saver --save

3、实现导出多个sheet的数据

exportexcel() {
    import("xlsx").then(xlsx => {
      // const worksheet = xlsx.utils.json_to_sheet(this.getcars());
      console.log(this.beautifulevalue);
      var all = [
        [],
        [],
        []
      ];
      this.beautifulevalue.districtbeautifyadjustedvalue.foreach(element => {
        all[0].push(
          {
            '区县': this.districtname[element.customer],
            '美化系数': element.coefficient,
            '美化值': element.beautifyvalue
          }
        );
      });
      this.beautifulevalue.platbeautifyadjustedvalue.foreach(element => {
        all[1].push(
          {
            '平台': this.platname[element.plat],
            '美化系数': element.coefficient,
            '美化值': element.beautifyvalue
          }
        );
      });
      this.beautifulevalue.industrybeautifyadjustedvalue.foreach(element => {
        all[2].push(
          {
            '行业': element.industry,
            '美化系数': element.coefficient,
            '美化值': element.beautifyvalue
          }
        );
      });
      const onesheet = xlsx.utils.json_to_sheet(all[0]);
      const twosheet = xlsx.utils.json_to_sheet(all[1]);
      const threesheet = xlsx.utils.json_to_sheet(all[2]);
      const workbook = { sheets: { '区县': onesheet, '平台': twosheet, '行业': threesheet }, sheetnames: ['区县', '平台', '行业'] };
      const excelbuffer: any = xlsx.write(workbook, { booktype: 'xlsx', type: 'array' });
      this.saveasexcelfile(excelbuffer, "美化值");
    });
  }

  saveasexcelfile(buffer: any, filename: string): void {
    import("file-saver").then(filesaver => {
      let excel_type = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8';
      let excel_extension = '.xlsx';
      const data: blob = new blob([buffer], {
        type: excel_type
      });
      filesaver.saveas(data, filename + '_export_' + new date().gettime() + excel_extension);
    });
  }