angular 使用xlsx 导出导入excel

1.安装xlsx插件 

npm install xlsx --save

2.在component中使用

ts:

import { Component, OnInit } from '@angular/core';
import * as XLSX from 'xlsx';

@Component({
  selector: 'app-excel',
  templateUrl: './excel.component.html',
  styleUrls: ['./excel.component.css']
})
export class ExcelComponent implements OnInit {
  data = [
    ['1','a','aa'],
    ['2','b','bb'],
    ['3','c','cc']
  ]
  inputdata = []
  constructor() {}
  ngOnInit() {
  }
  // 导出
  daochu(){
    /* generate worksheet */
    const ws: XLSX.WorkSheet = XLSX.utils.aoa_to_sheet(this.data);
    const ws2: XLSX.WorkSheet = XLSX.utils.aoa_to_sheet(this.data);

    /* generate workbook and add the worksheet */
    const wb: XLSX.WorkBook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');
    XLSX.utils.book_append_sheet(wb, ws2, 'Sheet2');

    console.log(wb)
    /* save to file */
    XLSX.writeFile(wb, 'SheetJS.xlsx');
  }

  // 导入
  daoru(evt: any) {
    /* wire up file reader */
    const target: DataTransfer = <DataTransfer>(evt.target);
    if (target.files.length !== 1) throw new Error('Cannot use multiple files');
    const reader: FileReader = new FileReader();
    reader.onload = (e: any) => {
      /* read workbook */
      const bstr: string = e.target.result;
      const wb: XLSX.WorkBook = XLSX.read(bstr, {type: 'binary'});

      /* grab first sheet */
      const wsname: string = wb.SheetNames[0];
      const ws: XLSX.WorkSheet = wb.Sheets[wsname];

      /* save data */
      this.inputdata = (XLSX.utils.sheet_to_json(ws, {header: 1}));
      console.log(this.inputdata)

      evt.target.value="" // 清空
    };
    reader.readAsBinaryString(target.files[0]);

  }

}

html：

<div>导出</div>
<button (click)="daochu()">导出</button>
<div>导入</div>
<input type="file" (change)="daoru($event)" multiple="false" />