时间戳常见转化

1、时间戳差转化为时间

var data1 = Date.parse(new Date()) //当前时间戳
var data2 = (new Date(2018, 6, 6, 0, 0, 0)).getTime(); //7月6日的时间戳
function getDifValue(nowtimestamp, beforetimestamp){
var difValue = nowtimestamp - beforetimestamp;
var day = Math.floor(difValue / 1000 / 60 / 60 / 24);//天
difValue = difValue % (1000 * 60 * 60 * 24);
var hour = Math.floor(difValue / 1000 / 60 / 60);//小时
difValue = difValue % (1000 * 60 * 60);
var min = Math.floor(difValue / 1000 / 60);//分钟
difValue = difValue % (1000 * 60);
var second = Math.floor(difValue / 1000);
return "超时:" + day + "年" + hour + "小时" + min + "分钟" + second + "秒"
}
getDifValue(data1,data2);

2、日期转化为时间戳

var date = new Date('2014-04-23 18:55:49:123');

 // 有三种方式获取

 var time1 = date.getTime();

 var time2 = date.valueOf();

 var time3 = Date.parse(date);

 

3、时间戳转换成日期格式

function timestampToTime(timestamp) {

        var date = new Date(timestamp * 1000);//时间戳为10位需*1000，时间戳为13位的话不需乘1000

        var Y = date.getFullYear() + '-';

        var M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '-';

        var D = date.getDate() + ' ';

        var h = date.getHours() + ':';

        var m = date.getMinutes() + ':';

        var s = date.getSeconds();

        return Y+M+D+h+m+s;

    }

    timestampToTime(1403058804);

    console.log(timestampToTime(1403058804));//2014-06-18 10:33:24

 4、2020-08-08与2020/08/08获取时间戳有差值，前者实际时间是2020-08-08 08:00:00，后者为2020/08/08 00:00:00