【时间戳转日时分秒】

public static String format2Duration(long ms) {

    long days = MILLISECONDS.toDays(ms);
    long hours = MILLISECONDS.toDurationHours(ms);
    long minutes = MILLISECONDS.toDurationMinutes(ms);
    long seconds = MILLISECONDS.toDurationSeconds(ms);

}

static final long C0 = 1L;
static final long C1 = C0 * 1000L;
static final long C2 = C1 * 1000L;
static final long C3 = C2 * 1000L;
static final long C4 = C3 * 60L;
static final long C5 = C4 * 60L;
static final long C6 = C5 * 24L;

/**
 * Time unit representing one thousandth of a second
 */
public static class MILLISECONDS {

    public static long toSeconds(long d) {
        return d / (C3 / C2);
    }

    public static long toMinutes(long d) {
        return d / (C4 / C2);
    }

    public static long toHours(long d) {
        return d / (C5 / C2);
    }

    public static long toDays(long d) {
        return d / (C6 / C2);
    }

    public static long toDurationSeconds(long d) {
        return (d % (C4 / C2)) / (C3 / C2);
    }

    public static long toDurationMinutes(long d) {
        return (d % (C5 / C2)) / (C4 / C2);
    }

    public static long toDurationHours(long d) {
        return (d % (C6 / C2)) / (C5 / C2);
    }

}

代码来自dolphinscheduler中DateUtils部分