Java tutorial
//package com.java2s; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; public class Main { public static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss"; public static String millis2String(long millis) { return new SimpleDateFormat(DEFAULT_PATTERN, Locale.getDefault()).format(new Date(millis)); } public static String millis2String(long millis, String pattern) { return new SimpleDateFormat(pattern, Locale.getDefault()).format(new Date(millis)); } }