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How to format time in js

Apr 11, 2020 am 09:13 AM
jstime

How to format time in js

1、获取当前时间

var myDate = new Date();

2、获取时间中的年月日时分秒

myDate.getYear();    // 获取当前年份(2位)
myDate.getFullYear();  // 获取完整的年份(4位,1970-????)
myDate.getMonth();    // 获取当前月份(0-11,0代表1月)
myDate.getDate();    // 获取当前日(1-31)
myDate.getDay();     // 获取当前星期X(0-6,0代表星期天)
myDate.getTime();    // 获取当前时间(从1970.1.1开始的毫秒数)
myDate.getHours();    // 获取当前小时数(0-23)
myDate.getMinutes();   // 获取当前分钟数(0-59)
myDate.getSeconds();   // 获取当前秒数(0-59)
myDate.getMilliseconds();  // 获取当前毫秒数(0-999)
myDate.toLocaleDateString();   // 获取当前日期
var mytime=myDate.toLocaleTimeString();   // 获取当前时间
myDate.toLocaleString( );    // 获取日期与时间

3、时间的格式化

// 对Date的扩展,将 Date 转化为指定格式的String
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符,
// 年(y)可以用 1-4 个占位符,毫秒(S)只能用 1 个占位符(是 1-3 位的数字)
// 例子:
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423
// (new Date()).Format("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18
 
Date.prototype.Format = function (fmt) { // author: meizz
  var o = {
    "M+": this.getMonth() + 1, // 月份
    "d+": this.getDate(), // 日
    "h+": this.getHours(), // 小时
    "m+": this.getMinutes(), // 分
    "s+": this.getSeconds(), // 秒
    "q+": Math.floor((this.getMonth() + 3) / 3), // 季度
    "S": this.getMilliseconds() // 毫秒
  };
  if (/(y+)/.test(fmt))
    fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
  for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
      return fmt;
}

调用:

var time1 = new Date().Format("yyyy-MM-dd");
 
var time2 = new Date().Format("yyyy-MM-dd hh:mm:ss");

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