转换时间戳

 1  var oDate = new Date(); //实例一个时间对象;
 2         oDate.getFullYear();   //获取系统的年;
 3         oDate.getMonth()+1;   //获取系统月份,由于月份是从0开始计算,所以要加1
 4         oDate.getDate(); // 获取系统日,
 5         oDate.getHours(); //获取系统时,
 6         oDate.getMinutes(); //
 7         oDate.getSeconds(); //
 8         let date = child.ymd;
 9         let time = `${oDate.getFullYear()}-${oDate.getMonth()+1}-${oDate.getDate()}`//拼接当前时间  年月日
10         console.log(Date.parse(new Date(time)),'当前时间') //转换时间戳
11         console.log(Date.parse(new Date(date)),"点击时间");
一:时间转时间戳:javascript获得时间戳的方法有四种,都是通过实例化时间对象 new Date() 来进一步获取当前的时间戳

1.var timestamp1 = Date.parse(new Date()); // 结果:1477808630000 不推荐这种办法,毫秒级别的数值被转化为000

  console.log(timestamp1);

2.var timestamp2 = (new Date()).valueOf(); // 结果:1477808630404 通过valueOf()函数返回指定对象的原始值获得准确的时间戳值

console.log(timestamp2);

3.var timestamp3 = new Date().getTime(); // 结果:1477808630404 ,通过原型方法直接获得当前时间的毫秒值,准确

console.log(timestamp3);

4.var timetamp4 = Number(new Date()) ; //结果:1477808630404 ,将时间转化为一个number类型的数值,即时间戳

console.log(timetamp4);

  

function getdate() {
            var now = new Date(),
                y = now.getFullYear(),
                m = now.getMonth() + 1,
                d = now.getDate();
            return y + "-" + (m < 10 ? "0" + m : m) + "-" + (d < 10 ? "0" + d : d) + " " + now.toTimeString().substr(0, 8);
        }

  

//将当前的时间转换成时间戳
var now = new Date();
console.log(now.getTime());
//将指定的日期转换成时间戳
var t = "2018-07-23 20:5:30";  
var T = new Date(t); 
console.log(T.getTime());
 //console.log(),为控制台打印

  

 // 获取当前时间戳(以s为单位)
     var timestamp = Date.parse(new Date());
    timestamp = timestamp / 1000;
    //当前时间戳为:1403149534
     console.log("当前时间戳为:" + timestamp);
    // 获取某个时间格式的时间戳
    var stringTime = "2018-07-10 10:21:12";
    var timestamp2 = Date.parse(new Date(stringTime));
    timestamp2 = timestamp2 / 1000;
    //2018-07-10 10:21:12的时间戳为:1531189272
    console.log(stringTime + "的时间戳为:" + timestamp2);
    // 将当前时间换成时间格式字符串
     var timestamp3 = 1531189272;
     var newDate = new Date();
     newDate.setTime(timestamp3 * 1000);
    // Wed Jun 18 2018
    console.log(newDate.toDateString());
    // Wed, 18 Jun 2018 02:33:24 GMT
     console.log(newDate.toGMTString());
    // 2018-06-18T02:33:24.000Z
    console.log(newDate.toISOString());
    // 2018-06-18T02:33:24.000Z
    console.log(newDate.toJSON());
    // 2018年6月18日
    console.log(newDate.toLocaleDateString());
    // 2018年6月18日 上午10:33:24
    console.log(newDate.toLocaleString());
    // 上午10:33:24
     console.log(newDate.toLocaleTimeString());
    // Wed Jun 18 2018 10:33:24 GMT+0800 (中国标准时间)
    console.log(newDate.toString());
    // 10:33:24 GMT+0800 (中国标准时间)
    console.log(newDate.toTimeString());
     // Wed, 18 Jun 2018 02:33:24 GMT
     console.log(newDate.toUTCString());
Date.prototype.format = function(format) {
    var date = {
        "M+": this.getMonth() + 1,
        "d+": this.getDate(),
        "h+": this.getHours(),
        "m+": this.getMinutes(),
        "s+": this.getSeconds(),
        "q+": Math.floor((this.getMonth() + 3) / 3),
        "S+": this.getMilliseconds()
    };
    if (/(y+)/i.test(format)) {
            format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));
        }
    for (var k in date) {
       if (new RegExp("(" + k + ")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length == 1
                ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
       }
     }
     return format;
 }
 console.log(newDate.format('yyyy-MM-dd h:m:s'));

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转载自www.cnblogs.com/tuziling/p/10714189.html