如何将文本日期转换为时间戳？

from datetime import datetime

text_date = "2022-01-01"
date_format = "%Y-%m-%d"
timestamp = int(datetime.strptime(text_date, date_format).timestamp())
print(timestamp)

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

public class Main {
    public static void main(String[] args) {
        String textDate = "2022-01-01";
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate date = LocalDate.parse(textDate, formatter);
        long timestamp = date.atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli();
        System.out.println(timestamp);
    }
}