使用js获取当前年月日的方法及格式整理汇总

var year = date.getFullYear();

var month = date.getMonth() + 1;

var day = date.getDate();

month = (month > 9) ? month : (“0” + month);
day = (day < 10) ? (“0” + day) : day;
var today = year + “-” + month + “-” + day;

 var date1 = new Date();
 Date.prototype.isLeapYear = function() {   
    return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));   
 }   
 console.log(date1.isLeapYear()); // false

/** 格式 YYYY/yyyy/YY/yy 表示年份  
  * MM/M 月份  
  * W/w 星期  
  * dd/DD/d/D 日期  
  * hh/HH/h/H 时间  
  * mm/m 分钟  
  * ss/SS/s/S 秒  
**/
//---------------------------------------------------  
Date.prototype.Format = function(formatStr)  {   
    var str = formatStr;   
    var Week = ['日','一','二','三','四','五','六'];  
  
    str=str.replace(/yyyy|YYYY/,this.getFullYear());   
    str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));   
  
    str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + (this.getMonth()+1));      
    str=str.replace(/M/g,this.getMonth());   
 
 
    str=str.replace(/w|W/g,Week[this.getDay()]);   
  
    str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());   
    str=str.replace(/d|D/g,this.getDate());   
  
    str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours());   
    str=str.replace(/h|H/g,this.getHours());   
    str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());   
    str=str.replace(/m/g,this.getMinutes());   
  
    str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());   
    str=str.replace(/s|S/g,this.getSeconds());   
  
    return str;   
}   
var date=new Date();
var res=date.Format("yyyy-MM-dd HH:mm:ss  星期W");
console.info(res); //2022-01-07 16:18:36  星期五