如何使用编程语言判断周六和周末日期

我们经常需要根据日期来判断是否为周末或者特定的周几。在本文中，我们将使用多种编程语言（Java、Golang、Python、Ruby、Swift、PHP）来演示如何通过编程获得和判断周六和周末日期。

Java

import java.time.DayOfWeek;
import java.time.LocalDate;

public class WeekendChecker {
    public static void main(String[] args) {
        LocalDate date = LocalDate.now();
        DayOfWeek dayOfWeek = date.getDayOfWeek();

        if (dayOfWeek == DayOfWeek.SATURDAY) {
            System.out.println("Today is Saturday!");
        } else if (dayOfWeek == DayOfWeek.SUNDAY) {
            System.out.println("Today is Sunday!");
        } else {
            System.out.println("Today is not a weekend day.");
        }
    }
}
  

Golang

  package main

  import (
    "fmt"
    "time"
  )
  
  func main() {
    date := time.Now()
    dayOfWeek := date.Weekday()
  
    if dayOfWeek == time.Saturday {
      fmt.Println("Today is Saturday!")
    } else if dayOfWeek == time.Sunday {
      fmt.Println("Today is Sunday!")
    } else {
      fmt.Println("Today is not a weekend day.")
    }
  }  
  

PHP

<?php
$date = date('Y-m-d');
$dayOfWeek = date('N', strtotime($date));

if ($dayOfWeek == 6) {  // Saturday
    echo "Today is Saturday!";
} else if ($dayOfWeek == 7) {  // Sunday
    echo "Today is Sunday!";
} else {
    echo "Today is not a weekend day.";
}
?>

Swift

mport Foundation

let date = Date()
let calendar = Calendar.current
let dayOfWeek = calendar.component(.weekday, from: date)

if dayOfWeek == 7 {  // Saturday
    print("Today is Saturday!")
} else if dayOfWeek == 1 {  // Sunday
    print("Today is Sunday!")
} else {
    print("Today is not a weekend day.")
}

Ruby

require 'date'

date = Date.today
day_of_week = date.wday

if day_of_week == 6  # Saturday
    puts "Today is Saturday!"
elsif day_of_week == 0  # Sunday
    puts "Today is Sunday!"
else
    puts "Today is not a weekend day."
end

Python

import datetime

date = datetime.date.today()
day_of_week = date.weekday()

if day_of_week == 5:  # Saturday
    print("Today is Saturday!")
elif day_of_week == 6:  # Sunday
    print("Today is Sunday!")
else:
    print("Today is not a weekend day.")