字符串日期需要格式

from datetime import datetime

date_str = "2022-01-01"
date_format = "%Y-%m-%d"

date_obj = datetime.strptime(date_str, date_format)
formatted_date = date_obj.strftime("%d/%m/%Y")

print(formatted_date)

const dateStr = "2022-01-01";
const date = new Date(dateStr);

const formattedDate = `${date.getDate()}/${date.getMonth() + 1}/${date.getFullYear()}`;

console.log(formattedDate);

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
    public static void main(String[] args) {
        String dateStr = "2022-01-01";
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

        try {
            Date date = format.parse(dateStr);
            String formattedDate = new SimpleDateFormat("dd/MM/yyyy").format(date);
            System.out.println(formattedDate);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}

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

$formattedDate = $format->format("d/m/Y");

echo $formattedDate;