js时间与时间戳之间的转换实例详解

1.将时间戳转换成时间

var formatDate = function(d) { 
var now = new Date(d);
var year = now.getFullYear();
var month = now.getMonth() + 1;
var date = now.getDate();
var hour = now.getHours();
var minute = now.getMinutes();
var second = now.getSeconds();
return year + "-" + month + "-" + date + "   " + hour + ":" + minute + ":" + second;
}

2.将一个时间戳减去当前时间戳来得到秒数

var dateDifference=function(expire_time){//返回秒数
var timestamp = Date.parse(new Date());//当前时间
timestamp=timestamp/1000;
expire_time=parseInt(expire_time/1000);//过期时间
return expire_time-timestamp;
}

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