Java tutorial
//package com.java2s; import java.time.LocalDateTime; import java.time.ZoneOffset; public class Main { /** * @param date * Date for which seconds since the epoch date is to be calculated * @return Number of seconds after the unix epoch date equivalent to the given date */ public static Integer secondsSinceUnixEpoch(final LocalDateTime date) { if (date == null) { return null; } final Long timeInSeconds = Long.valueOf(date.toEpochSecond(ZoneOffset.UTC)); return Integer.valueOf(timeInSeconds.intValue()); } }