Java日期——获取今天是星期几

package com.example.demo.controller;

import java.util.Calendar;
import java.util.Date;

public class Demo {

    //根据日期取得星期几
    public static String getDayOfTheWeek(Date date){
        String[] weeks = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int week_index = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if(week_index<0){
            week_index = 0;
        }
        return weeks[week_index];
    }

    public static void main(String[] args) {
        System.out.println("value = " +  getDayOfTheWeek(new Date()));
    }

}