如何在ReactJS中以JSON格式从excel中获取数据? [英] How to get the data from excel in JSON format in ReactJS?

问题描述

我需要从 excel 中获取数据并将其以 Json 格式存储为键值对.我如何在 React 中做到这一点?

Excel 数据-

预期的 o/p-

{"段": "空气","TripName":"测试 UI 流程","开始日期":"6/19/2020","endDate":"6/25/2020","总票价":"3948"}

解决方案

这里是一种将 (xlsx) Excel 文件转换为 json 的方法.我已经使它从本地文件系统(即桌面等)获取文件.但您可以轻松地将其转换为从服务器获取文件.

import React, { useState } from "react";导入./App.css"；从xlsx"导入 * 作为 XLSX；class ExcelToJson 扩展了 React.Component {构造函数(道具){超级(道具)；this.handleClick = this.handleClick.bind(this);this.state = {文件: ""，};}句柄点击(e){this.refs.fileUploader.click();}文件路径集(e){e.stopPropagation();e.preventDefault();var file = e.target.files[0];控制台日志(文件)；this.setState({文件});控制台.log(this.state.file);}读取文件(){var f = this.state.file;var name = f.name;const reader = new FileReader();reader.onload = (evt) =>{//evt = on_file_select 事件/* 解析数据 */const bstr = evt.target.result;const wb = XLSX.read(bstr, { type: "binary" });/* 获取第一个工作表 */const wsname = wb.SheetNames[0];const ws = wb.Sheets[wsname];/* 转换数组数组 */const data = XLSX.utils.sheet_to_csv(ws, { header: 1 });/* 更新状态 */console.log("Data>>>" + data);//显示读取excel数据console.log(this.convertToJson(data));//以json格式显示数据};reader.readAsBinaryString(f);}convertToJson(csv) {var lines = csv.split("\n");var 结果 = [];var headers = lines[0].split(",");for (var i = 1; i {this.readFile();}}>读取文件

);}}导出默认 ExcelToJson；

readFile 函数中的控制台日志为您获取 json 中的数据.

I need to fetch the data from excel and store it in Json format as key value pair. How can i do it in React?

Excel Data-

Expected o/p-

{ "Segment": "Air", "TripName":"Test UI Flow", "startDate":"6/19/2020", "endDate":"6/25/2020", "totalFare":"3948" }

解决方案

Here is a method to convert (xlsx) Excel files into json. I have made it to get file from local file system i.e Desktop etc. But you can easily convert it to fetch files from server.

import React, { useState } from "react";
import "./App.css";
import * as XLSX from "xlsx";

class ExcelToJson extends React.Component {
  constructor(props) {
    super(props);
    this.handleClick = this.handleClick.bind(this);
    this.state = {
      file: "",
    };
  }

  handleClick(e) {
    this.refs.fileUploader.click();
  }

  filePathset(e) {
    e.stopPropagation();
    e.preventDefault();
    var file = e.target.files[0];
    console.log(file);
    this.setState({ file });

    console.log(this.state.file);
  }

  readFile() {
    var f = this.state.file;
    var name = f.name;
    const reader = new FileReader();
    reader.onload = (evt) => {
      // evt = on_file_select event
      /* Parse data */
      const bstr = evt.target.result;
      const wb = XLSX.read(bstr, { type: "binary" });
      /* Get first worksheet */
      const wsname = wb.SheetNames[0];
      const ws = wb.Sheets[wsname];
      /* Convert array of arrays */
      const data = XLSX.utils.sheet_to_csv(ws, { header: 1 });
      /* Update state */
      console.log("Data>>>" + data);// shows that excel data is read
      console.log(this.convertToJson(data)); // shows data in json format
    };
    reader.readAsBinaryString(f);
  }

  convertToJson(csv) {
    var lines = csv.split("\n");

    var result = [];

    var headers = lines[0].split(",");

    for (var i = 1; i < lines.length; i++) {
      var obj = {};
      var currentline = lines[i].split(",");

      for (var j = 0; j < headers.length; j++) {
        obj[headers[j]] = currentline[j];
      }

      result.push(obj);
    }

    //return result; //JavaScript object
    return JSON.stringify(result); //JSON
  }

  render() {
    return (
      <div>
        <input
          type="file"
          id="file"
          ref="fileUploader"
          onChange={this.filePathset.bind(this)}
        />
        <button
          onClick={() => {
            this.readFile();
          }}
        >
          Read File
        </button>
      </div>
    );
  }
}

export default ExcelToJson;

The console log in readFile function gets you the data in json.

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