irille.pub.svr.DateUtils.java Source code

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Here is the source code for irille.pub.svr.DateUtils.java

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/*
 *  DateUtils.java
 *  
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 *  Author: Winter Lau (javayou@gmail.com)
 *  http://dlog4j.sourceforge.net
 */
package irille.pub.svr;

import java.sql.Time;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 
 * 
 * @author Winter Lau
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    /**
     * ?
     * 
     * @param date
     * @param time
     * @return
     */
    public static Calendar mergeDateTime(Date date, Time time) {
        Calendar cal = Calendar.getInstance();
        if (date != null)
            cal.setTime(date);
        if (time != null) {
            Calendar temp = Calendar.getInstance();
            temp.setTime(time);
            cal.set(Calendar.HOUR_OF_DAY, temp.get(Calendar.HOUR_OF_DAY));
            cal.set(Calendar.MINUTE, temp.get(Calendar.MINUTE));
            cal.set(Calendar.SECOND, temp.get(Calendar.SECOND));
            cal.set(Calendar.MILLISECOND, temp.get(Calendar.MILLISECOND));
        }
        return cal;
    }

    /**
     * 
     * 
     * @param d1
     * @param d2
     * @return
     */
    public static int diff_in_date(Date d1, Date d2) {
        return (int) Math.abs(((d1.getTime() - d2.getTime()) / 86400000));
    }

    public static int subMonth(Date d1, Date d2) {
        int suby = d2.getYear() - d1.getYear();
        int rst = (suby + 1) * 12;
        rst = rst - d1.getMonth();
        rst = rst - (11 - d2.getMonth());
        return rst;
    }

    /**
     * ??
     * 
     * @param year
     * @param month
     * @param date
     * @return
     */
    public static Calendar getDateBegin(int year, int month, int date) {
        Calendar begin_time = Calendar.getInstance();
        begin_time.set(Calendar.YEAR, year);
        begin_time.set(Calendar.MONTH, month - 1);
        begin_time.set(Calendar.DATE, date);
        begin_time.set(Calendar.HOUR_OF_DAY, 0);
        begin_time.set(Calendar.MINUTE, 0);
        begin_time.set(Calendar.SECOND, 0);
        begin_time.set(Calendar.MILLISECOND, 0);
        return begin_time;
    }

    /**
     * 
     * 
     * @param cal
     */
    public static void resetTime(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
    }

    /**
     * "yyyy-mm-dd?date"
     * 
     * @param str
     * @return
     */
    public static Date stringToDate(String str) {
        String[] arr = str.split("-");
        Date date = new Date(Integer.parseInt(arr[0]) - 1900, Integer.parseInt(arr[1]) - 1,
                Integer.parseInt(arr[2]));
        return date;
    }

    public static Date getDateSub(Date date, int sub) {
        return new Date(date.getYear(), date.getMonth(), date.getDate() - sub);
    }

    // ?
    public static Date getMonthOne(Date date) {
        return new Date(date.getYear(), date.getMonth(), 1);
    }

    // ??
    public static Date getMonthBefore(Date date) {
        return new Date(date.getYear(), date.getMonth() - 1, date.getDate());
    }

    /**
     * Date
     * @param timeMillis
     * @return
     * @throws ParseException
     */
    public static Date timeMillisToDate(Long timeMillis) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String sd = format.format(new Date(timeMillis));
        Date date = format.parse(sd);
        return date;
    }

    /**
     * Date
     * @param date
     * @return
     */
    public static Long dateToTimeMillis(Date date) {
        return date.getTime();
    }

}