把秒数转化为：小时：分：秒

     今天在工作中有这么一个小功能需要实现，在DB里面，经过转码的video的duration是按秒来统计的，但是我们在页面显示的时候，一般都是这与显示的：小时：分：秒，04:34:45。所以就需要把秒转化为这个格式。代码很简单，这里记录下，以便以后查看

 

 

	public static String getDuration(int durationSeconds){
		int hours = durationSeconds /(60*60);
		int leftSeconds = durationSeconds % (60*60);
		int minutes = leftSeconds / 60;
		int seconds = leftSeconds % 60;
		
		StringBuffer sBuffer = new StringBuffer();
		sBuffer.append(addZeroPrefix(hours));
		sBuffer.append(":");
		sBuffer.append(addZeroPrefix(minutes));
		sBuffer.append(":");
		sBuffer.append(addZeroPrefix(seconds));
		
		return sBuffer.toString();
	}
	
	public static String addZeroPrefix(int number){
		if(number < 10){
			return "0"+number;
		}else{
			return ""+number;
		}

	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(getDuration(7200));
		System.out.println(getDuration(7230));
		System.out.println(getDuration(7324));
		System.out.println(getDuration(1234));
		System.out.println(getDuration(72340));
		
		/**
		 02:00:00
	     02:00:30
		 02:02:04
		 00:20:34
		 20:05:40
		 */
	}