如何将十进制小时值转换为hh：mm：ss

如何在jquery或javascript中将十进制小时值（如1.6578）转换为hh：mm：ss？

我只是设法用hh：mm使用这段代码：

var decimaltime= "1.6578"; var hrs = parseInt(Number(decimaltime)); var min = Math.round((Number(decimaltime)-hrs) * 60); var clocktime = hrs+':'+min; 

Answer 1

你可以这样做：

 var decimalTimeString = "1.6578"; var decimalTime = parseFloat(decimalTimeString); decimalTime = decimalTime * 60 * 60; var hours = Math.floor((decimalTime / (60 * 60))); decimalTime = decimalTime - (hours * 60 * 60); var minutes = Math.floor((decimalTime / 60)); decimalTime = decimalTime - (minutes * 60); var seconds = Math.round(decimalTime); if(hours < 10) { hours = "0" + hours; } if(minutes < 10) { minutes = "0" + minutes; } if(seconds < 10) { seconds = "0" + seconds; } alert("" + hours + ":" + minutes + ":" + seconds); 

Answer 2

不要自己进行计算，而是使用内置function在Date对象的任意日期设置秒数，将其转换为字符串，然后切掉日期部分，只留下hh：mm：ss字符串。

 var decimalTimeString = "1.6578"; var n = new Date(0,0); n.setSeconds(+decimalTimeString * 60 * 60); document.write(n.toTimeString().slice(0, 8));