从 zip 文件夹读取 excel 文件时未正确解析日期

Question

我正在从 ui 上传一个 zip 文件夹，其中有一个 excel 文件。我写了下面的代码

getZipData(file: File) {
const jsZip = require('jszip');
let excelRecord: any[] = [];
let images: { path: string, image: string }[] = [];
let fileList: any[] = [];
const reader = new FileReader();
jsZip.loadAsync(file).then((zip: any) => {
  Object.keys(zip.files).forEach((filename) => {

    if (!zip.files[filename].dir && filename.includes('xlsx')) {
    
      zip.files[filename].async('ArrayBuffer').then((fileData: any) => { 

        const data = new Uint8Array(fileData);
        const arr = new Array();
        for (let i = 0; i != data.length; ++i) {
          arr[i] = String.fromCharCode(data[i]);
        }
        const bstr = arr.join("");
        const workbook = XLSX.read(fileData, { type: "binary" });
        const first_sheet_name = workbook.SheetNames[0];
        const worksheet = workbook.Sheets[first_sheet_name];
        excelRecord = XLSX.utils.sheet_to_json(worksheet);
        console.log(JSON.stringify(excelRecord));
        //{name:"abcd",birthdate:36141}  <---- this is the output
      });
    }
  })
})
}

在输出日期 (12-12-1998) 没有被正确解析它应该是 {name:"abcd",birthdate:"12-12-1998"} 当我手动解析此日期时，它会创建 01/01/1970。我怎样才能得到准确的日期？

Answer 1

我认为你需要将日期乘以 10000000

试试这个

console.log(new Date(36141* 10000000));

Answer 2

更改此行

 const workbook = XLSX.read(fileData, { type: "binary"});

到

 const workbook = XLSX.read(fileData, { type: "binary", cellDates: true });

您将获得印度标准时间的日期，然后根据您的要求进行转换

示例：

var date = new Date(excelRecord.birthdate).toLocaleDateString();

从 zip 文件夹读取 excel 文件时未正确解析日期

date is not correctly parsed while reading an excel file from a zip folder

xlsx

jszip

angular