Here you can find the source of isoDateFormat(final Date date)
public static String isoDateFormat(final Date date)
//package com.java2s; /**// w w w .j ava2s . com * Copyright (c) 2005-2012 Zauber S.A. <http://www.zaubersoftware.com/> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class Main { private static ThreadLocal<DateFormat> FORMATTER = new ThreadLocal<DateFormat>(); /** Formatea una fecha en YYYY-MM-DD */ public static String isoDateFormat(final Date date) { return getFormatter().format(date); } /** Retrieves the {@link DateFormat} for the current Thread */ private static DateFormat getFormatter() { DateFormat formatter = FORMATTER.get(); if (formatter == null) { formatter = createIsoDateFormatter(); FORMATTER.set(formatter); } return formatter; } /** Creates a DateFormat with ISO Format */ private static DateFormat createIsoDateFormatter() { DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); formatter.setLenient(false); return formatter; } }