Java tutorial
/* * Copyright (c) Koala 2012-2014 All Rights Reserved * * 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. */ package org.openkoala.koala.commons; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.Locale; import org.apache.commons.lang.StringUtils; import org.apache.commons.lang.time.DateFormatUtils; import org.apache.commons.lang.time.DateUtils; /** * ??<br /> * * 2013-6-5 ?10:51:13 <br /> * * ??Copyright (c) 2013 Koala All Rights Reserved<br /> * * <a href="mailto:vakinge@gmail.com">vakin jiang</a><br /> * * <br /> * */ public class KoalaDateUtils { public static final String HHMM = "HHmm"; public static final String DDMMMYY = "ddMMMyy"; public static final String DD_MMMYYYY_HHMM = "ddMMMyyyy HHmm"; public static final String DD_MMMYYYY_HH_MM = "ddMMMyyyy HH:mm"; public static final String DD_MMMYYYY_HH_MM_SS = "ddMMMyyyy HH:mm:ss"; public static final String YYYY_MM_DD = "yyyy-MM-dd"; public static final String YYYY2MM2DD = "yyyy/MM/dd"; public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss"; public static final String YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm"; public static final String HH_MM = "HH:mm"; public static final String YYYY_MM_DD2HH_mm = "yyyy-MM-dd-HH-mm"; public static final String YYYYMMDDHHMM = "yyyyMMddHHmm"; /** * ?<br> * ??<br> * generate by: vakin jiang at 2012-3-1 * * @param dateStr * @return */ public static Date parseDate(String dateStr) { SimpleDateFormat format = null; if (StringUtils.isBlank(dateStr)) { return null; } String _dateStr = dateStr.trim(); try { if (_dateStr.matches("\\d{1,2}[A-Z]{3}")) { _dateStr = _dateStr + (Calendar.getInstance().get(Calendar.YEAR) - 2000); } // 01OCT12 if (_dateStr.matches("\\d{1,2}[A-Z]{3}\\d{2}")) { format = new SimpleDateFormat("ddMMMyy", Locale.ENGLISH); } else if (_dateStr.matches("\\d{1,2}[A-Z]{3}\\d{4}.*")) {// 01OCT2012 // ,01OCT2012 // 1224,01OCT2012 // 12:24 _dateStr = _dateStr.replaceAll("[^0-9A-Z]", "").concat("000000").substring(0, 15); format = new SimpleDateFormat("ddMMMyyyyHHmmss", Locale.ENGLISH); } else { StringBuffer sb = new StringBuffer(_dateStr); String[] tempArr = _dateStr.split("\\s+"); tempArr = tempArr[0].split("-|\\/"); if (tempArr.length == 3) { if (tempArr[1].length() == 1) { sb.insert(5, "0"); } if (tempArr[2].length() == 1) { sb.insert(8, "0"); } } _dateStr = sb.append("000000").toString().replaceAll("[^0-9]", "").substring(0, 14); if (_dateStr.matches("\\d{14}")) { format = new SimpleDateFormat("yyyyMMddHHmmss"); } } Date date = format.parse(_dateStr); return date; } catch (Exception e) { throw new RuntimeException("?[" + dateStr + "]"); } } /** * ???<br> * generate by: vakin jiang at 2012-3-1 * * @param dateStr * @param pattern * @return */ public static Date parseDate(String dateStr, String pattern) { try { SimpleDateFormat format = null; if (StringUtils.isBlank(dateStr)) { return null; } if (StringUtils.isNotBlank(pattern)) { format = new SimpleDateFormat(pattern); return format.parse(dateStr); } return parseDate(dateStr); } catch (Exception e) { throw new RuntimeException("?[" + dateStr + "]"); } } /** * ?<br> * generate by: vakin jiang at 2011-12-23 * * @param date * @return */ public static Date getDayBegin(Date date) { String format = DateFormatUtils.format(date, YYYY_MM_DD); return parseDate(format.concat(" 00:00:00")); } /** * ??<br> * generate by: vakin jiang at 2011-12-23 * * @param date * @return */ public static Date getDayEnd(Date date) { String format = DateFormatUtils.format(date, YYYY_MM_DD); return parseDate(format.concat(" 23:59:59")); } /** * ???<br> * generate by: vakin jiang at 2011-12-23 * * @param date * @return */ public static Date timestamp2Date(Date date) { return formatDate(date, YYYY_MM_DD); } /** * ???<br> * generate by: vakin jiang at 2011-12-23 * * @param date * @return */ public static String formatDate2YYYY_MM_DD(Date date) { return format(date, YYYY_MM_DD); } /** * ??ddMMMyy<br> * generate by: vakin jiang * at 2012-10-17 * @param dateStr * @return */ public static String format2ddMMMyy(Date date) { SimpleDateFormat format = new SimpleDateFormat("ddMMMyy", Locale.ENGLISH); return format.format(date).toUpperCase(); } /** * ??ddMMMyy<br> * generate by: vakin jiang * at 2012-10-17 * @param dateStr * @return */ public static String format2ddMMMyy(String dateStr) { SimpleDateFormat format = new SimpleDateFormat("ddMMMyy", Locale.ENGLISH); return format.format(parseDate(dateStr)).toUpperCase(); } /** * ?<br> * generate by: vakin jiang at 2012-3-7 * * @param dateStr * @param patterns * @return */ public static String formatDateStr(String dateStr, String... patterns) { String pattern = YYYY_MM_DD_HH_MM_SS; if (patterns != null && patterns.length > 0 && StringUtils.isNotBlank(patterns[0])) { pattern = patterns[0]; } return DateFormatUtils.format(parseDate(dateStr), pattern); } /** * ?<br> * generate by: vakin jiang at 2012-3-7 * * @param orig * @param patterns * @return */ public static String format(Date date, String... patterns) { if (date == null) return ""; String pattern = YYYY_MM_DD_HH_MM_SS; if (patterns != null && patterns.length > 0 && StringUtils.isNotBlank(patterns[0])) { pattern = patterns[0]; } return DateFormatUtils.format(date, pattern); } public static String format2YYYY_MM_DD(Date date) { return format(date, YYYY_MM_DD); } /** * ??<br> * generate by: vakin jiang at 2012-3-7 * * @param orig * @param patterns * @return */ public static Date formatDate(Date orig, String... patterns) { String pattern = YYYY_MM_DD_HH_MM_SS; if (patterns != null && patterns.length > 0 && StringUtils.isNotBlank(patterns[0])) { pattern = patterns[0]; } return parseDate(DateFormatUtils.format(orig, pattern)); } /** * ?<br> * generate by: vakin jiang at 2012-6-4 * * @return */ public static Date currentGMTTime() { return DateUtils.addHours(Calendar.getInstance(Locale.CHINA).getTime(), -8); } }