[Java]两个将秒数转化为日时分秒形式的函数

比如900秒要反应一下，说15分就直观了。下面两个函数性能差不多，大家任意取用。

代码：

import java.util.concurrent.TimeUnit;

public class TestTime {
    public static void main(String[] args) {
        long[] seconds = {3, 300, 3000, 30000, 3000009, 30000000,999999999999L };
        long startTime,endTime;

        for (long s : seconds) {
            startTime = System.currentTimeMillis();
            System.out.print("toDHMSStyle:"+sec2DHMS(s));
            endTime = System.currentTimeMillis();
            System.out.print(" used "+(endTime-startTime)+"ms\n" );

            startTime = System.currentTimeMillis();
            System.out.print("calculateTime:"+sec2DHMS1(s));
            endTime = System.currentTimeMillis();
            System.out.print(" used "+(endTime-startTime)+"ms\n" );

            System.out.println();
        }
    }

    /**
     * 将秒转化为日时分秒
     * @param secondCount
     * @return
     */
    private static String sec2DHMS(long secondCount) {
        String retval = null;

        long days = secondCount / (60 * 60 * 24);
        long hours = (secondCount % (60 * 60 * 24)) / (60 * 60);
        long minutes = (secondCount % (60 * 60)) / 60;
        long seconds = secondCount % 60;

        String strSeconds="";
        if(seconds!=0) {
            strSeconds=seconds + "s";
        }

        if (days > 0) {
            retval = days + "d" + hours + "h" + minutes + "m" + strSeconds;
        } else if (hours > 0) {
            retval = hours + "h" + minutes + "m" + strSeconds;
        } else if (minutes > 0) {
            retval = minutes + "m" + strSeconds;
        } else {
            retval = strSeconds;
        }

        return retval;
    }

    /**
     * 将秒转化为日时分秒
     * @param secondCount
     * @return
     */
    private static String sec2DHMS1(long secondCount) {
        String retval = null;

        int days = (int) TimeUnit.SECONDS.toDays(secondCount);
        long hours = TimeUnit.SECONDS.toHours(secondCount) - TimeUnit.DAYS.toHours(days);
        long minutes = TimeUnit.SECONDS.toMinutes(secondCount) - TimeUnit.DAYS.toMinutes(days) - TimeUnit.HOURS.toMinutes(hours);
        long seconds = TimeUnit.SECONDS.toSeconds(secondCount) - TimeUnit.DAYS.toSeconds(days) - TimeUnit.HOURS.toSeconds(hours) - TimeUnit.MINUTES.toSeconds(minutes);

        String strSeconds="";
        if(seconds!=0) {
            strSeconds=seconds + "s";
        }

        if (days > 0) {
            retval = days + "d" + hours + "h" + minutes + "m" + strSeconds;
        } else if (hours > 0) {
            retval = hours + "h" + minutes + "m" + strSeconds;
        } else if (minutes > 0) {
            retval = minutes + "m" + strSeconds;
        } else {
            retval = strSeconds;
        }

        return retval;
    }
}

输出：

toDHMSStyle1:3s used 0ms
toDHMSStyle2:3s used 2ms

toDHMSStyle1:5m used 0ms
toDHMSStyle2:5m used 0ms

toDHMSStyle1:50m used 0ms
toDHMSStyle2:50m used 0ms

toDHMSStyle1:8h20m used 0ms
toDHMSStyle2:8h20m used 0ms

toDHMSStyle1:34d17h20m9s used 0ms
toDHMSStyle2:34d17h20m9s used 0ms

toDHMSStyle1:347d5h20m used 0ms
toDHMSStyle2:347d5h20m used 0ms

toDHMSStyle1:11574074d1h46m39s used 0ms
toDHMSStyle2:11574074d1h46m39s used 0ms

--END-- 2019.11.08