时间转换工具

/**
 * 毫秒转换为时间字符串
 * @param milliseconds
 * @return
 */
public static String timeStampToDhms(long milliseconds) {
    long day = TimeUnit.MILLISECONDS.toDays(milliseconds);
    long hours = TimeUnit.MILLISECONDS.toHours(milliseconds) - TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS.toDays(milliseconds));
    long minutes = TimeUnit.MILLISECONDS.toMinutes(milliseconds) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(milliseconds));
    long seconds = TimeUnit.MILLISECONDS.toSeconds(milliseconds) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(milliseconds));
    StringBuilder sb = new StringBuilder();
    if (day != 0) {
        sb.append(day + "天");
    }
    sb.append(hours + "小时");
    sb.append(minutes + "分");
    sb.append(seconds + "秒");
    return sb.toString();
}