如何转换日期格式

from datetime import datetime

date_str = '2022-01-01'
date_obj = datetime.strptime(date_str, '%Y-%m-%d')
new_date_str = date_obj.strftime('%m/%d/%Y')
print(new_date_str)  # 输出：01/01/2022

const dateStr = '2022-01-01';
const dateObj = new Date(dateStr);
const newDateStr = `${dateObj.getMonth() + 1}/${dateObj.getDate()}/${dateObj.getFullYear()}`;
console.log(newDateStr);  // 输出：01/01/2022

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

public class DateFormatConverter {
    public static void main(String[] args) {
        String dateStr = "2022-01-01";
        DateTimeFormatter inputFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        DateTimeFormatter outputFormatter = DateTimeFormatter.ofPattern("MM/dd/yyyy");
        try {
            LocalDate dateObj = LocalDate.parse(dateStr, inputFormatter);
            String newDateStr = dateObj.format(outputFormatter);
            System.out.println(newDateStr);  // 输出：01/01/2022
        } catch (DateTimeParseException e) {
            System.out.println("Invalid date format");
        }
    }
}