您将如何以编程方式从存储在字符串中的日期创建模式？

from datetime import datetime

date_string = "2022-01-01"
date_format = "%Y-%m-%d"
date_obj = datetime.strptime(date_string, date_format)

const date_string = "2022-01-01";
const date_obj = new Date(date_string);

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

String date_string = "2022-01-01";
DateTimeFormatter date_format = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate date_obj = LocalDate.parse(date_string, date_format);

using System;

string date_string = "2022-01-01";
DateTime date_obj = DateTime.ParseExact(date_string, "yyyy-MM-dd", CultureInfo.InvariantCulture);

$date_string = "2022-01-01";
$date_obj = DateTime::createFromFormat("Y-m-d", $date_string);