Java 将秒数转成00:00:00格式

/**
 * 时间工具类
 * Created by zhh on 2017/12/20.
 */
public class DateUtil {
	
	/**
     * 一小时的秒数
     */
    private static final int HOUR_SECOND = 60 * 60;

    /**
     * 一分钟的秒数
     */
    private static final int MINUTE_SECOND = 60;
    
    /**
     * 根据秒数获取时间串
     * @param second (eg: 100s)
     * @return (eg: 00:01:40)
     */
	public static String getTimeStrBySecond(int second) {
		if (second <= 0) {

			return "00:00:00";
		}

		StringBuilder sb = new StringBuilder();
		int hours = second / HOUR_SECOND;
		if (hours > 0) {

			second -= hours * HOUR_SECOND;
		}

		int minutes = second / MINUTE_SECOND;
		if (minutes > 0) {

			second -= minutes * MINUTE_SECOND;
		}

		return (hours >= 10 ? (hours + "")
				: ("0" + hours) + ":" + (minutes >= 10 ? (minutes + "") : ("0" + minutes)) + ":"
						+ (second >= 10 ? (second + "") : ("0" + second)));
	}
}