将时间戳数据解析为本地日期和时间

Question

我在获取存储在JSON文件中的时间戳的本地日期和时间时遇到了一些麻烦。

方法getData()应该从JSON文件中获取所有数据，包括格式为"YYYY-mm-dd"并返回它以加载到网页。但是日期只是作为数字字符串加载，而不是人类可读格式的日期。YYYY-mm-dd)。

<标题>JSON数据

[
{
"id": 1,
"name": "CastAway",
"description": "Cast movies, music, or pictures to any TV",
"createdDate": 1629343012430,
"lastUpdated": 1629343012430
},
{
"id": 2,
"name": "Turn",
"description": "Find directions to new destinations",
"createdDate": 1629343012430,
"lastUpdated": 1629343012430
}
]

<标题>代码

const fs = require('fs');
const util = require('util');
const readFile = util.promisify(fs.readFile);
const writeFile = util.promisify(fs.writeFile);
/**
* Logic for reading and writing project data
*/
class ProjectService {
/**
* Constructor
* @param {*} datafile Path to a JSOn file that contains the project data
*/
constructor(datafile) {
this.datafile = datafile;
}
// adding data to JSON file
async addEntry(name, description) {
const data = (await this.getData()) || [];
const createdDate = Date.now();
const lastUpdated = Date.now();
const id = 0;
data.unshift({ id, name, description, createdDate, lastUpdated });
return writeFile(this.datafile, JSON.stringify(data));
}
async getList() {
const data = await this.getData();
for (let i in data) {
data[i]['createdDate'] = new Date(data[i]['createdDate']);
data[i]['lastUpdated'] = new Date(data[i]['lastUpdated']);
}
console.log(data);
return data;
}
//reading data from JSON file
async getData() {
const data = await readFile(this.datafile, 'utf8');
if (!data) return [];
return JSON.parse(data);
}
}

Answer 1

您将不得不在调用JSON之后重新创建日期。解析如下:

var data = await getData();
var parsedCreatedDate = new Date(data[0]['createdDate']);
var parsedlastUpdated = new Date(data[0]['lastUpdated']);