封装了DateUtil方法

封装了DateUtil方法

/**
 * all rights reserved by zhanqiong, 2005
 */
package com.koubei.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * @author chen
 * 
 */
public class DateUtil {
	
	/**
	 * 日
	 */
	public final static int INTERVAL_DAY = 1;
	/**
	 * 周
	 */
	public final static int INTERVAL_WEEK = 2;
	/**
	 * 月
	 */
	public final static int INTERVAL_MONTH = 3;
	/**
	 * 年
	 */
	public final static int INTERVAL_YEAR = 4;
	/**
	 * 小时
	 */
	public final static int INTERVAL_HOUR = 5;
	/**
	 * 分钟
	 */
	public final static int INTERVAL_MINUTE = 6;
	/**
	 * 秒
	 */
	public final static int INTERVAL_SECOND = 7;	
	
	/**
	 * date = 1901-01-01
	 */
	public final static Date tempDate=new Date(new Long("-2177481952000"));;

	/**
	 * 测试是否是当天
	 * 
	 * @param date - 某一日期
	 * @return true-今天, false-不是
	 */
	@SuppressWarnings("deprecation")
	public static boolean isToday(Date date) {
		Date now = new Date();
		boolean result = true;
		result &= date.getYear()==now.getYear();
		result &= date.getMonth()==now.getMonth();
		result &= date.getDate()==now.getDate();
		return result;
	}

	/**
	 * 两个日期相减，取天数
	 * 
	 * @param date1
	 * @param date2
	 * @return
	 */
	public static long DaysBetween(Date date1, Date date2) {
		if (date2 == null)
			date2 = new Date();
		long day = (date2.getTime() - date1.getTime()) / (24 * 60 * 60 * 1000);
		return day;
	}

	/**
	 * 比较两个日期 if date1<=date2 return true
	 * 
	 * @param date1
	 * @param date2
	 * @return
	 */
	public static boolean compareDate(String date1, String date2) {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			Date d1 = format.parse(date1);
			Date d2 = format.parse(date2);
			return !d1.after(d2);
		} catch (ParseException e) {
			e.printStackTrace();
			return false;
		}
	}

	/**
	 * 字符型转换成日期型
	 * 
	 * @param date
	 * @param dateFormat
	 * @return
	 */
	public static Date dateFormat(String date, String dateFormat) {
		if (date == null)
			return null;
		SimpleDateFormat format = new SimpleDateFormat(dateFormat);
		if (date != null) {
			try {
				return format.parse(date);
			} catch (Exception ex) {
			}
		}
		return null;
	}

    
	/**
	 * 使用默认格式 yyyy-MM-dd HH:mm:ss
	 * @author Robin Chang
	 * @param date
	 * @return
	 */
	public static Date dateFormat(String date)
	{
		return dateFormat(date,"yyyy-MM-dd HH:mm:ss");
	}

	/**
	 * 日期型转换成字符串
	 * 
	 * @param date
	 * @param dateFormat
	 * @return
	 */
	public static String dateFormat(Date date, String dateFormat) {
		if (date == null)
			return "";
		SimpleDateFormat format = new SimpleDateFormat(dateFormat);
		if (date != null) {
			return format.format(date);
		}
		return "";
	}
	
	/**
     * 由于生日增加保密属性，现决定1900为保密对应值，如果遇到1900的年份，则隐掉年份
     * 
     * @param date
     * @param dateFormat
     * @return 不保密显示1981-12-01保密则显示`12-01
     */
    public static String birthdayFormat(Date date) {
        if (date == null)
            return "";
        SimpleDateFormat format = null;
        if(date.before(tempDate)) {
            format = new SimpleDateFormat("MM-dd");
        }else {
            format = new SimpleDateFormat("yyyy-MM-dd");       
        }
        if (date != null) {
            return format.format(date);
        }
        return "";
    }
    
	/**
	 * 使用默认格式 yyyy-MM-dd HH:mm:ss
	 * @param date
	 * @return
	 */
	public static String dateFormat(Date date)
	{
		return dateFormat(date,"yyyy-MM-dd HH:mm:ss");
	}
	

	public static boolean isExpiredDay(Date date1) {
		long day = (new Date().getTime() - date1.getTime()) / (24 * 60 * 60 * 1000);
		if (day >= 1)
			return true;
		else
			return false;
	}

	public static Date getYesterday() {
		Date date = new Date();
		long time = (date.getTime() / 1000) - 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			date = format.parse(format.format(date));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;
	}

	public static Date getWeekAgo() {
		Date date = new Date();
		long time = (date.getTime() / 1000) - 7 * 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			date = format.parse(format.format(date));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;
	}

	public static String getDaysAgo(int interval) {
		Date date = new Date();
		long time = (date.getTime() / 1000) - interval * 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return format.format(date);
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return "";
	}

	public static Date getTomorrow() {
		Date date = new Date();
		long time = (date.getTime() / 1000) + 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			date = format.parse(format.format(date));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;
	}

	

	public static Date getBeforeDate(String range) {
		Calendar today = Calendar.getInstance();
		if ("week".equalsIgnoreCase(range))
			today.add(Calendar.WEEK_OF_MONTH, -1);
		else if ("month".equalsIgnoreCase(range))
			today.add(Calendar.MONTH, -1);
		else
			today.clear();
		return today.getTime();
	}

	public static Date getThisWeekStartTime() {
		Calendar today = Calendar.getInstance();
		today.set(Calendar.DAY_OF_WEEK, today.getFirstDayOfWeek());
		Calendar weekFirstDay = Calendar.getInstance();
		weekFirstDay.clear();
		weekFirstDay.set(Calendar.YEAR, today.get(Calendar.YEAR));
		weekFirstDay.set(Calendar.MONTH, today.get(Calendar.MONTH));
		weekFirstDay.set(Calendar.DATE, today.get(Calendar.DATE));
		return weekFirstDay.getTime();
	}

	public static String getToday(String format) {
		String result = "";
		try {
			Date today = new Date();
			SimpleDateFormat simpleFormat = new SimpleDateFormat(format);
			result = simpleFormat.format(today);
		} catch (Exception e) {
		}
		return result;
	}

	public static Date getStartDay(int year, int month) {
		Calendar today = Calendar.getInstance();
		today.clear();
		today.set(Calendar.YEAR, year);
		today.set(Calendar.MONTH, month - 1);
		today.set(Calendar.DAY_OF_MONTH, 1);
		return today.getTime();
	}

	public static List<Integer> getBeforeYearList(int before) {
		Calendar today = Calendar.getInstance();
		int theYear = today.get(Calendar.YEAR);
		List<Integer> list = new ArrayList<Integer>();
		for (int i = before; i >= 0; i--)
			list.add(theYear - i);

		return list;
	}
	
	/**
	 * 增加时间
	 * @param interval [INTERVAL_DAY,INTERVAL_WEEK,INTERVAL_MONTH,INTERVAL_YEAR,INTERVAL_HOUR,INTERVAL_MINUTE]
	 * @param date
	 * @param n 可以为负数
	 * @return
	 */
	public static Date dateAdd(int interval,Date date,int n)
	{
		long time = (date.getTime() / 1000); //单位秒
		switch(interval)
		{
			case INTERVAL_DAY:
				time = time + n * 86400;//60 * 60 * 24;
				break;
			case INTERVAL_WEEK:
				time = time + n * 604800;//60 * 60 * 24 * 7;
				break;
			case INTERVAL_MONTH:
				time = time + n * 2678400;//60 * 60 * 24 * 31;
				break;
			case INTERVAL_YEAR:
				time = time + n * 31536000;//60 * 60 * 24 * 365;
				break;
			case INTERVAL_HOUR:
				time = time + n * 3600;//60 * 60 ;
				break;
			case INTERVAL_MINUTE:
				time = time + n * 60;
				break;
			case INTERVAL_SECOND:
				time = time + n;
				break;
			default:
		}
		
		Date result = new Date();
		result.setTime(time * 1000);
		return result;
	}
	
	/**
	 * 计算两个时间间隔
	 * @param interval [INTERVAL_DAY,INTERVAL_WEEK,INTERVAL_MONTH,INTERVAL_YEAR,INTERVAL_HOUR,INTERVAL_MINUTE]
	 * @param begin
	 * @param end
	 * @return
	 */
	public static int dateDiff(int interval,Date begin,Date end)
	{
		long beginTime = (begin.getTime() / 1000); //单位：秒
		long endTime = (end.getTime() / 1000); //单位: 秒
		long tmp = 0;
		if (endTime == beginTime)
		{
			return 0;
		}

		//确定endTime 大于 beginTime 结束时间秒数 大于 开始时间秒数
		if (endTime < beginTime)
		{
			tmp = beginTime;
			beginTime = endTime;
			endTime = tmp;
		}
		
		long intervalTime = endTime - beginTime;
		long result = 0;
		switch(interval)
		{
			case INTERVAL_DAY:
				result = intervalTime / 86400;//60 * 60 * 24;
				break;
			case INTERVAL_WEEK:
				result = intervalTime / 604800;//60 * 60 * 24 * 7;
				break;
			case INTERVAL_MONTH:
				result = intervalTime / 2678400;//60 * 60 * 24 * 31;
				break;
			case INTERVAL_YEAR:
				result = intervalTime / 31536000;//60 * 60 * 24 * 365;
				break;
			case INTERVAL_HOUR:
				result = intervalTime / 3600;//60 * 60 ;
				break;
			case INTERVAL_MINUTE:
				result = intervalTime / 60;
				break;
			case INTERVAL_SECOND:
				result = intervalTime / 1;
				break;
			default:
		}		
		
		//做过交换
		if (tmp > 0)
		{
			result = 0 - result;
		}
		return (int) result;
	}	
	
	/**
	 * 当前年份
	 * @return
	 */
	public static int getTodayYear()
	{
		int yyyy = Integer.parseInt(dateFormat(new Date(),"yyyy"));
		return yyyy;
	}
		
	public static Date getNow()
	{
		return new Date();
	}
	
	/**
	 * 把日期格式为rss格式兼容的字符串
	 * @param date
	 * @return
	 */
	public static String dateFormatRss(Date date)
	{
		if (date != null)
		{
			return dateFormat(date,"E, d MMM yyyy H:mm:ss") + " GMT";
		}
		return "";
	}
	
	/**
	 * 判断当前日期是否在两个日期之间
	 * @param startDate 开始时间
	 * @param endDate　结束时间
	 * @return　
	 */
	public static boolean betweenStartDateAndEndDate(Date startDate,Date endDate){
		boolean bool=false;
		Date curDate=new Date();
		if (curDate.after(startDate) && curDate.before(DateUtil.dateAdd( INTERVAL_DAY ,endDate,1)) ){
			bool=true;
		}
		return bool;
		
	}
	
	/**
	 * 判断当前时间是否在在两个时间之间
	 * @param startDate 开始时间
	 * @param endDate　结束时间
	 * @return　
	 */
	public static boolean nowDateBetweenStartDateAndEndDate(Date startDate,Date endDate){
		boolean bool=false;
		Date curDate=new Date();
		if (curDate.after(startDate) && curDate.before(endDate)){
			bool=true;
		}
		return bool;
	}
	
	/**
	 * 判断当前时间是否在date之后
	 * @param date
	 * @return　
	 */
	public static boolean nowDateAfterDate(Date date){
		boolean bool=false;
		Date curDate=new Date();
		if (curDate.after(date)){
			bool=true;
		}
		return bool;
	}
	
	
	/**
	 * 判断二个日期相隔的天数,结束时间为null时，，取当前时间
	 * @param startDate 开始时间
	 * @param endDate　结束时间
	 * @return　
	 */
	public static int getBetweenTodaysStartDateAndEndDate(Date startDate,Date endDate){
		int betweentoday = 0;
		if(startDate==null){
			return betweentoday;
		}
		if(endDate==null){
			Calendar calendar = Calendar.getInstance();
			String year = new Integer(calendar.get(Calendar.YEAR)).toString();
			String month = new Integer((calendar.get(calendar.MONTH)+1)).toString();
			String day =  new Integer(calendar.get(calendar.DAY_OF_MONTH)).toString();
			String strtodaytime = year+"-"+month+"-"+day;
			DateFormat  formatter=new SimpleDateFormat("yyyy-MM-dd");   
			try {
				endDate = formatter.parse(strtodaytime);
			} catch (ParseException e) {
				//TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
		if(endDate.after(startDate)){
			betweentoday =  (int)((endDate.getTime() -startDate.getTime())/86400000);
		}else{
			betweentoday =  (int)((startDate.getTime() -endDate.getTime())/86400000);
		}
		return betweentoday;
	}
     /**   
	    *   取得指定长度日期时间字符串{不含格式}   
	        @param   format   时间格式由常量决定   
	        8: 　YYMMDDHH            8位   
		    10:　YYMMDDHHmm          10位   
			12:　YYMMDDHHmmss        12位   
			14:　YYYYMMDDHHmmss      14位   
			15:　YYMMDDHHmmssxxx     15位   (最后的xxx   是毫秒) 

	    */ 
	public   static  String  getTime(int  format){   
        StringBuffer   cTime=new   StringBuffer(10);   
        Calendar   time=Calendar.getInstance();   
        int   miltime=time.get(Calendar.MILLISECOND);   
        int   second=time.get(Calendar.SECOND);   
        int   minute=time.get(Calendar.MINUTE);   
        int   hour=time.get(Calendar.HOUR_OF_DAY);   
        int   day   =time.get(Calendar.DAY_OF_MONTH);   
        int   month=time.get(Calendar.MONTH)+1;   
        int   year   =time.get(Calendar.YEAR);   
        if(format!=14){   
                if(year>=2000)   year=year-2000;   
                else   year=year-1900;   
        }   
        if(format>=2){   
                if(format==14)   cTime.append(year);   
                else         cTime.append(getFormatTime(year,2));   
        }   
        if(format>=4)   
                cTime.append(getFormatTime(month,2));   
        if(format>=6)   
                cTime.append(getFormatTime(day,2));   
        if(format>=8)   
                cTime.append(getFormatTime(hour,2));   
        if(format>=10)   
                cTime.append(getFormatTime(minute,2));   
        if(format>=12)   
                cTime.append(getFormatTime(second,2));   
        if(format>=15)   
                cTime.append(getFormatTime(miltime,3));   
        return   cTime.toString();   
	}   
	  /**   
	    *　产生任意位的字符串   
	    *   @param   time   要转换格式的时间   
	    *   @param   format　转换的格式   
	    *   @return　String   转换的时间   
	    */ 
	private  static  String  getFormatTime(int  time,int   format){   
          StringBuffer   numm=new   StringBuffer();   
          int   length=String.valueOf(time).length(); 
          if(format<length)   return   null;
          for(int   i=0   ;i<format-length   ;i++){   
                  numm.append("0");   
          }   
          numm.append(time);   
          return   numm.toString().trim();   
   }   
	
	
	/**
	 * 根据生日去用户年龄
	 * @param birthday
	 * @return int
	 * @exception
	 * @author     豆皮
	 * @Date       Apr 24, 2008
	 */
	public static int getUserAge(Date birthday){
		 if(birthday == null) return 0;
		 Calendar cal = Calendar.getInstance();
	     if(cal.before(birthday)) {
	    	 return 0;
		 }
		 int yearNow = cal.get(Calendar.YEAR);
		 cal.setTime(birthday);// 给时间赋值
		 int yearBirth = cal.get(Calendar.YEAR);
		 return yearNow - yearBirth;
	}

    /**
     * 将int型时间(1970年至今的秒数)转换成Date型时间
     * @param unixTime 1970年至今的秒数
     * @return 
     * @author     郑卿
     */
    public static Date getDateByUnixTime(int unixTime){
        return new Date(unixTime*1000L);
    }
    
    /**
     * 将Date型时间转换成int型时间(1970年至今的秒数)
     * @param unixTime 1970年至今的秒数
     * @return 
     * @author     郑卿
     */
    public static int getUnixTimeByDate(Date date){
        return (int)(date.getTime()/1000);
    }

	
	public static void main(String[] args) {
	    Date date1 =dateFormat("1981-01-01 00:00:00");
	    Date date2 =dateFormat("1900-12-31 00:00:00");
	    System.out.println(birthdayFormat(date1));
        System.out.println(birthdayFormat(date2));
	}
	public static Date getNextDay(Date date) {
		long time = (date.getTime() / 1000) + 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			date = format.parse(format.format(date));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;

	}

	/**
	 * @param date
	 * @return
	 * 复制新Date，不改变参数
	 */
	public static Date nextDay(Date date) {
		Date newDate = (Date) date.clone();
		long time = (newDate.getTime() / 1000) + 60 * 60 * 24;
		newDate.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			newDate = format.parse(format.format(newDate));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return newDate;

	}

	@SuppressWarnings("unused")
	public static Date getNowTime() {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Date date = new Date();
		String dateStr = dateFormat(date);
		try {
			date = format.parse(dateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return date;
	}

	public static Date getTomorrow(Date date1) {

		// 创建当前时间对象
		Calendar now = Calendar.getInstance();
		now.setTime(date1);
		// 日期[+1]day
		now.add(Calendar.DATE, 1);
		return now.getTime();
	}

	public static Date getWeekAgo(Date date) {
		Date newDate = (Date) date.clone();
		long time = (newDate.getTime() / 1000) - 60 * 60 * 24 * 7;
		newDate.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			newDate = format.parse(format.format(newDate));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return newDate;
	}

	public static Date getDatebyTime(Date date, int n) {
		String str = DateUtil.dateFormat(date, "yyyy-MM-dd");
		String[] strs = str.split("-");
		int month = Integer.parseInt(strs[1]);
		int monthnow = (month + n) % 12;
		int year = Integer.parseInt(strs[0]) + (month + n) / 12;
		str = String.valueOf(year) + "-" + String.valueOf(monthnow) + "-"
				+ strs[2];
		return DateUtil.dateFormat(str, "yyyy-MM-dd");
	}

	/**
	 * @param date
	 * @return
	 * 复制新Date，不改变参数
	 */
	public static Date yesterday(Date date) {
		Date newDate = (Date) date.clone();
		long time = (newDate.getTime() / 1000) - 60 * 60 * 24;
		newDate.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			newDate = format.parse(format.format(newDate));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return newDate;
	}

	public static Date getYesterday(Date date) {
		long time = (date.getTime() / 1000) - 60 * 60 * 24;
		date.setTime(time * 1000);
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		try {
			date = format.parse(format.format(date));
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;
	}

	private static SimpleDateFormat format = null;
	@SuppressWarnings("unused")
	public static String getStringNowTime() {
		format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Date date = new Date();
		String dateStr = dateFormat(date);

		return dateStr;
	}
	
	
	/**
     * 指定时间的秒数
     * 指定时间零点的秒数加指定天数的秒数
     * @param time 时间
     * @param range  天
     * @return
     */
    public static long getSpecifyTimeSec(long time,int range){
    	Date date 			= new Date((time*1000+(23-Calendar.ZONE_OFFSET)*3600000)/86400000*86400000-(23-Calendar.ZONE_OFFSET)*3600000);   
    	long zeroTime 		= date.getTime()/1000;
    	long specifyTime 	= range * 24 * 3600;
    	return (zeroTime+specifyTime);
    }
    
    /**
     * 将int型时间(1970年至今的秒数)转换成指定格式的时间
     * 
     * @param unixTime 1970年至今的秒数
     * @param dateFormat 时间格式
     * @return 
     * @author  sky
     */
    public static String formatDateByUnixTime(long unixTime, String dateFormat){
        return dateFormat(new Date(unixTime*1000), dateFormat);
    }
	
}