util之日期工具类

package com.xxx.core.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;

import org.apache.commons.lang.time.DateUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class DateUtil {

    private static final Log logger = LogFactory.getLog(DateUtil.class);

    /**
     * 设置当前时间为当天的最初时间（即00时00分00秒）
     * 
     * @param cal
     * @return
     */
    public static Calendar setStartDay(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        return cal;
    }

    public static Calendar setEndDay(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.SECOND, 59);
        return cal;
    }

    /**
     * 把源日历的年月日设置到目标日历对象中
     * 
     * @param destCal
     * @param sourceCal
     */
    public static void copyYearMonthDay(Calendar destCal, Calendar sourceCal) {
        destCal.set(Calendar.YEAR, sourceCal.get(Calendar.YEAR));
        destCal.set(Calendar.MONTH, sourceCal.get(Calendar.MONTH));
        destCal.set(Calendar.DAY_OF_MONTH, sourceCal.get(Calendar.DAY_OF_MONTH));
    }

    /**
     * 格式化日期为
     * 
     * @return
     */
    public static String formatEnDate(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");

        return sdf.format(date).replaceAll("上午", "AM").replaceAll("下午", "PM");
    }

    public static Date parseDate(String dateString) {
        Date date = null;
        try {
            date = DateUtils.parseDate(dateString, new String[] { StringPool.DATE_FORMAT_DATETIME, StringPool.DATE_FORMAT_DATE });
        } catch (Exception ex) {
            logger.error("Pase the Date(" + dateString + ") occur errors:" + ex.getMessage());
        }
        return date;
    }

    /**
     * 日期加一天
     * 
     * @param date
     * @return
     */
/*    public static String addOneDay(String date) {
        DateFormat format = new SimpleDateFormat(StringPool.DATE_FORMAT_DATE);
        Calendar calendar = Calendar.getInstance();
        try {
            Date dd = format.parse(date);
            calendar.setTime(dd);
            calendar.add(Calendar.DAY_OF_MONTH, 1);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        String tmpDate = format.format(calendar.getTime());
        return tmpDate.substring(5, 7) + "/" + tmpDate.substring(8, 10) + "/" + tmpDate.substring(0, 4);
    }*/

    /**
     * 加一小时
     * 
     * @param date
     * @return
     */
    public static String addOneHour(String date) {

        String amPm = date.substring(20, 22);

        DateFormat format = new SimpleDateFormat(StringPool.DATE_FORMAT_DATETIME);
        Calendar calendar = Calendar.getInstance();

        int hour = Integer.parseInt(date.substring(11, 13));
        try {
            if (amPm.equals("PM")) {
                hour += 12;
            }
            date = date.substring(0, 11) + (hour >= 10 ? hour : "0" + hour) + date.substring(13, 19);
            Date dd = format.parse(date);
            calendar.setTime(dd);
            calendar.add(Calendar.HOUR_OF_DAY, 1);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        String tmpDate = format.format(calendar.getTime());

        hour = Integer.parseInt(tmpDate.substring(11, 13));
        amPm = hour >= 12 && hour != 0 ? "PM" : "AM";
        if (amPm.equals("PM")) {
            hour -= 12;
        }
        tmpDate = tmpDate.substring(5, 7) + "/" + tmpDate.substring(8, 10) + "/" + tmpDate.substring(0, 4) + " " + (hour >= 10 ? hour : "0" + hour) + tmpDate.substring(13, tmpDate.length()) + " " + amPm;

        return tmpDate;
    }

    /**
     * 标准时间格式转为时间字符格式
     * 
     * @param timeStr
     *            eg:Mon Feb 06 00:00:00 CST 2012
     * @return
     */
    public static String timeStrToDateStr(String timeStr) {

        String dateStr = timeStr.substring(24, 28) + "-";

        String mon = timeStr.substring(4, 7);
        if (mon.equals("Jan")) {
            dateStr += "01";
        } else if (mon.equals("Feb")) {
            dateStr += "02";
        } else if (mon.equals("Mar")) {
            dateStr += "03";
        } else if (mon.equals("Apr")) {
            dateStr += "04";
        } else if (mon.equals("May")) {
            dateStr += "05";
        } else if (mon.equals("Jun")) {
            dateStr += "06";
        } else if (mon.equals("Jul")) {
            dateStr += "07";
        } else if (mon.equals("Aug")) {
            dateStr += "08";
        } else if (mon.equals("Sep")) {
            dateStr += "09";
        } else if (mon.equals("Oct")) {
            dateStr += "10";
        } else if (mon.equals("Nov")) {
            dateStr += "11";
        } else if (mon.equals("Dec")) {
            dateStr += "12";
        }

        dateStr += "-" + timeStr.substring(8, 10);

        return dateStr;
    }

    /**
     * 根据日期得到星期多余天数
     * 
     * @param sDate
     * @return
     */
    public static int getExtraDayOfWeek(String sDate) {
        try {
            SimpleDateFormat format = new SimpleDateFormat(StringPool.DATE_FORMAT_DATE);
            Date date = format.parse(sDate);
            String weekday = date.toString().substring(0, 3);
            if (weekday.equals("Mon")) {
                return 1;
            } else if (weekday.equals("Tue")) {
                return 2;
            } else if (weekday.equals("Wed")) {
                return 3;
            } else if (weekday.equals("Thu")) {
                return 4;
            } else if (weekday.equals("Fri")) {
                return 5;
            } else if (weekday.equals("Sat")) {
                return 6;
            } else {
                return 0;
            }

        } catch (Exception ex) {
            return 0;
        }
    }

    public static int dayForWeek(Date date) {
        return dayForWeek(date, 1);
    }

    public static int dayForWeek(Date date, int firstDay) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
        if (firstDay == 0)
            return dayOfWeek;
        return dayOfWeek == 1 ? 7 : dayOfWeek - 1;
    }

    public static void main(String[] args) throws Exception {
        Date date = DateFormatUtil.parseDate("2015-08-02");
        System.out.println(dayForWeek(date));
    }

    /**
     * 根据日期得到星期多余天数
     * 
     * @param sDate
     * @return
     */
    public static String getDateWeekDay(String sDate) {
        try {
            SimpleDateFormat format = new SimpleDateFormat(StringPool.DATE_FORMAT_DATE);
            Date date = format.parse(sDate);
            String weekday = date.toString().substring(0, 3);
            // format.format(date)+" "+
            return weekday;

        } catch (Exception ex) {
            return "";
        }
    }

    /**
     * 取得上下五年
     * 
     * @param cal
     * @return
     */
    public static List<String> getUpDownFiveYear(Calendar cal) {
        List<String> yearlist = new ArrayList<String>();

        int curyear = cal.get(Calendar.YEAR);
        yearlist.add(String.valueOf(curyear - 2));
        yearlist.add(String.valueOf(curyear - 1));
        yearlist.add(String.valueOf(curyear));
        yearlist.add(String.valueOf(curyear + 1));
        yearlist.add(String.valueOf(curyear + 2));

        return yearlist;
    }

    /**
     * 取得12个月
     * 
     * @param cal
     * @return
     */
    public static List<String> getTwelveMonth() {
        List<String> monthlist = new ArrayList<String>();

        for (int idx = 1; idx <= 12; idx++) {
            monthlist.add(String.valueOf(idx));
        }

        return monthlist;
    }

    /**
     * 得到两日期间所有日期
     * 
     * @param startTime
     * @param endTime
     * @return
     * @throws Exception
     */
    public static String[] getDaysBetweenDate(String startTime, String endTime) {

        String[] dateArr = null;
        try {

            String stime = timeStrToDateStr(startTime);
            String etime = timeStrToDateStr(endTime);

            // 日期相减算出秒的算法
            Date date1 = new SimpleDateFormat(StringPool.DATE_FORMAT_DATE).parse(stime);
            Date date2 = new SimpleDateFormat(StringPool.DATE_FORMAT_DATE).parse(etime);

            long day = (date1.getTime() - date2.getTime()) / (24 * 60 * 60 * 1000) > 0 ? (date1.getTime() - date2.getTime()) / (24 * 60 * 60 * 1000) : (date2.getTime() - date1.getTime()) / (24 * 60 * 60 * 1000);

            dateArr = new String[Integer.valueOf(String.valueOf(day + 1))];
            for (int idx = 0; idx < dateArr.length; idx++) {
                if (idx == 0) {
                    dateArr[idx] = stime;
                } else {
                    stime = addOneDay(stime);
                    stime = stime.substring(6, 10) + "-" + stime.substring(0, 2) + "-" + stime.substring(3, 5);
                    dateArr[idx] = stime;
                }
            }

        } catch (ParseException e) {
            e.printStackTrace();
        }

        return dateArr;
    }

    /**
     * 获取当月第一天
     * 
     * @return
     */
    public static Date getMonthFirstDay() {
        Calendar ca = Calendar.getInstance();
        ca.set(Calendar.DAY_OF_MONTH, 1);
        return ca.getTime();
    }

    /**
     * 获取当月最后一天
     * 
     * @return
     */
    public static Date getMonthLastDay() {
        Calendar ca = Calendar.getInstance();
        ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));
        return ca.getTime();
    }

    /**
     * 根据年月获取当月最后一天
     * 
     * @param yearmonth
     *            yyyy-MM
     * @return yyyy-MM-dd
     * @throws ParseException
     */
    public static String getLastDayOfMonth(String yearmonth) {
        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM");
            Date dd = format.parse(yearmonth);
            Calendar cal = Calendar.getInstance();
            cal.setTime(dd);
            int cc = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
            String result = yearmonth + "-" + cc;
            return result;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    /**
     * 字符串的日期加上一天，在返回字符串
     */
    public String addOneDay(String countdate) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.setTime(sdf.parse(countdate));
        c.add(Calendar.DATE, 1);
        String rtn = sdf.format(c.getTime());
        return rtn;
    }
    /**
     * 
     * 字符串的日期加上一天，在返回字符串
     */
    public String subOneDay(String countdate) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.setTime(sdf.parse(countdate));
        c.add(Calendar.DATE, -1);
        String rtn = sdf.format(c.getTime());
        return rtn;
    }
}