/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.hx.rainbow.common.util;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
/**
* 日期操作工具类
*
* @author hx
*
*/
public class DateUtil {
/**
* 默认日期格式：yyyy-MM-dd
*/
public static final String DEFAULT_DATE_PATTERN = "yyyy-MM-dd";
/**
* 默认时间格式：yyyy-MM-dd HH:mm:ss
*/
public static final String DEFAULT_DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
/**
* 默认时间戳格式，到毫秒 yyyy-MM-dd HH:mm:ss SSS
*/
public static final String DEFAULT_DATEDETAIL_PATTERN = "yyyy-MM-dd HH:mm:ss SSS";
/**
* 1天折算成毫秒数
*/
public static final long MILLIS_A_DAY = 24 * 3600 * 1000;
private static HashMap<String,Object> parsers = new HashMap<String,Object>();
private static SimpleDateFormat getDateParser(String pattern) {
Object parser = parsers.get(pattern);
if (parser == null) {
parser = new SimpleDateFormat(pattern);
parsers.put(pattern, parser);
}
return (SimpleDateFormat) parser;
}
/**
* 取得系统当前年份
* @return
*/
public static int currentYear()
{
java.util.Calendar c = java.util.Calendar.getInstance();
return c.get(java.util.Calendar.YEAR);
}
/**
* 取得当前系统日期
*
* @return
*/
public static java.util.Date currentDate() {
return new java.util.Date();
}
/**
* 取得系统当前日期，返回默认日期格式的字符串。
*
* @param strFormat
* @return
*/
public static String nowDate(String strFormat) {
java.util.Date date = new java.util.Date();
return getDateParser(strFormat).format(date);
}
/**
* 取得当前系统时间戳
*
* @return
*/
public static Timestamp currentTimestamp() {
return new Timestamp(new Date().getTime());
}
/**
* 将日期字符串转换为java.util.Date对象
*
* @param dateString
* @param pattern
* 日期格式
* @return
* @throws Exception
*/
public static java.util.Date toDate(String dateString, String pattern)
throws Exception {
return getDateParser(pattern).parse(dateString);
}
/**
* 将日期字符串转换为java.util.Date对象，使用默认日期格式
*
* @param dateString
* @return
* @throws Exception
*/
public static java.util.Date toDate(String dateString) throws Exception {
return getDateParser(DEFAULT_DATE_PATTERN).parse(dateString);
}
/**
* 将时间字符串转换为java.util.Date对象
* @param dateString
* @return
* @throws Exception
*/
public static java.util.Date toDateTime(String dateString) throws Exception {
return getDateParser(DEFAULT_DATETIME_PATTERN).parse(dateString);
}
/**
* 将java.util.Date对象转换为字符串
* @param date
* @param pattern
* @return
*/
public static String toDateString(java.util.Date date, String pattern) {
return getDateParser(pattern).format(date);
}
/**
* 将java.util.Date对象转换为字符串，使用默认日期格式
* @param date
* @param pattern
* @return
*/
public static String toDateString(java.util.Date date) {
return getDateParser(DEFAULT_DATE_PATTERN).format(date);
}
/**
* 将java.util.Date对象转换为时间字符串，使用默认日期格式
* @param date
* @return
*/
public static String toDateTimeString(java.util.Date date) {
return getDateParser(DEFAULT_DATETIME_PATTERN).format(date);
}
/**
* 日期相减
* @param date
* @param day
* @return
*/
public static Date diffDate(java.util.Date date, int day) {
java.util.Calendar c = java.util.Calendar.getInstance();
c.setTimeInMillis(getMillis(date) - ((long) day) * MILLIS_A_DAY );
return c.getTime();
}
/**
* 返回毫秒
*
* @param date
* 日期
* @return 返回毫秒
* @author doumingjun create 2007-04-07
*/
public static long getMillis(java.util.Date date) {
java.util.Calendar c = java.util.Calendar.getInstance();
c.setTime(date);
return c.getTimeInMillis();
}
/**
* 日期相加
*
* @param date
* 日期
* @param day
* 天数
* @return 返回相加后的日期
* @author doumingjun create 2007-04-07
*/
public static java.util.Date addDate(java.util.Date date, int day) {
java.util.Calendar c = java.util.Calendar.getInstance();
c.setTimeInMillis(getMillis(date) + ((long) day) * MILLIS_A_DAY);
return c.getTime();
}
/**
* 日期增加年数
* @param date
* @param year
* @return
* @author zhf
*/
public static Date addYear(Date date , int year){
Calendar calender = Calendar.getInstance();
calender.setTime(date);
calender.add(Calendar.YEAR, year);
return calender.getTime();
}
/**
* 日期增加月数
* @param date
* @param year
* @return
* @author zhf
*/
public static Date addMonth(Date date , int month){
Calendar calender = Calendar.getInstance();
calender.setTime(date);
calender.add(Calendar.MONTH, month);
return calender.getTime();
}
/**
* 根据季度获得相应的月份
*
* @param quarters 季度
*
* @return 返回相应的月份
*/
public static String getMonth(String quarters) {
String month;
int m = Integer.parseInt(quarters);
m = m * 3 - 2;
if (m > 0 && m < 10) {
month = "0" + String.valueOf(m);
} else {
month = String.valueOf(m);
}
return month;
}
/**
* 根据月份获得相应的季度
*
* @param month 月份
*
* @return 返回相应的季度
*/
public static String getQuarters(String month) {
String quarters = null;
int m = Integer.parseInt(month);
if (m == 1 || m == 2 || m == 3) {
quarters = "1";
}
if (m == 4 || m == 5 || m == 6) {
quarters = "2";
}
if (m == 7 || m == 8 || m == 9) {
quarters = "3";
}
if (m == 10 || m == 11 || m == 12) {
quarters = "4";
}
return quarters;
}
/**
* 获取日期所在星期的第一天，这里设置第一天为星期日
* @param datestr
* @return
*/
public static String getFirstDateOfWeek(String datestr){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
try {
Date date=sdf.parse(datestr);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);//这里设置从周日开始
return sdf.format(cal.getTime());
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取日期所在当年的第几周
* @param datestr
* @return
*/
public static int getWeekOfYear(String datestr){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
try {
Date date=sdf.parse(datestr);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal.get(Calendar.WEEK_OF_YEAR);
} catch (ParseException e) {
e.printStackTrace();
}
return -1;
}
@SuppressWarnings("deprecation")
public static String getWeekday(String datestr){
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
try {
Date date=sdf.parse(datestr);
switch (date.getDay()) {
case 1:
return "星期一";
case 2:
return "星期二";
case 3:
return "星期三";
case 4:
return "星期四";
case 5:
return "星期五";
case 6:
return "星期六";
default:
return "星期天";
}
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
public static Date getDate(Object object) {
Date date = null;
try {
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd hh:mm:ss");
SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd hh:mm");
SimpleDateFormat format3 = new SimpleDateFormat("yyyy-MM-dd");
if (object instanceof String) {
try {
date = format.parse((String) object);
} catch (Exception e) {
try {
date = format2.parse((String) object);
} catch (Exception ee) {
date = format3.parse((String) object);
}
}
} else if (object instanceof java.util.Date) {
date = (Date) object;
} else if (object instanceof Timestamp) {
date = (Date) object;
} else {
date = new java.util.Date();
}
} catch (Exception e) {
e.printStackTrace();
}
return date;
}
}