DateUtils

public abstract class DateUtils {

    public static final String DATE_FORMAT = "yyyy-MM-dd";
    public static final String chDATE_FORMAT = "yyyy年MM月dd日";
    public static final String defalut_date_format = "yyyy-MM-dd HH:mm:ss";
    public static final String shortsdf_format = "HH:mm";
    public static final String DATE_FORMAT_YEAR_MONTH = "MM-dd";
    public static final String DATE_BASE_STRING = "yyyyMMddHHmmss";

    /**
     * 格式化日期为指定格式
     * @param stringDate
     * @param  pattern
     * @return
     */
    public static Date formateStringToDate(String stringDate, String pattern) {
        if(stringDate == null) {
            return null;
        }
        try{
            SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
            Date date = dateFormat.parse(stringDate);
            return date;
        }catch (Exception e){

        }
        return null;
    }

    public static String formatDateToString(Date date, String pattern){
        if(date == null){
            return null;
        }
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);
        String dateFormatStr = simpleDateFormat.format(date);
        return dateFormatStr;

    }

    public static String getWeekString(Date date){
        if(date == null) {
            return null;
        }
        String result = new SimpleDateFormat("u").format(date);
        int r = Integer.parseInt(result);
        String week = "";
        switch (r) {
            case 1:
                week = "星期一";
                break;
            case 2:
                week = "星期二";
                break;
            case 3:
                week = "星期三";
                break;
            case 4:
                week = "星期四";
                break;
            case 5:
                week = "星期五";
                break;
            case 6:
                week = "星期六";
                break;
            case 7:
                week = "星期日";
                break;
        }

        return week;
    }

    public static Date addHour(Date myDate, int amount) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(myDate);
        cal.add(Calendar.HOUR, amount);
        return cal.getTime();
    }

    public static Date addDay(Date myDate, int amount) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(myDate);
        cal.add(Calendar.DATE, amount);
        return cal.getTime();
    }

    /**
     * 取固当天内的定时间
     * @param hour 时
     * @param minute 分
     * @param second 秒
     * @return
     */
    public static Date getTime(int hour, int minute, int second) {
        return getTime(new Date(), hour, minute, second);
    }

    /**
     * 取固定时间
     * @param date
     * @param hour
     * @param minute
     * @param second
     * @return
     */
    public static Date getTime(Date date, int hour, int minute, int second) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH);
        int day = cal.get(Calendar.DATE);
        cal.set(year, month, day, hour, minute, second);
        return cal.getTime();
    }


    /**
     * 计算两个日期间的相差分钟数
     * @param date     大的日期
     * @param beforeDate 小的日期
     * @return
     */
    public static int minutessBetween(Date date,Date beforeDate) {
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH");
        Calendar cal = Calendar.getInstance();
        long time1 = 0;
        long time2 = 0;
        try{
            cal.setTime(date);
            time1 = cal.getTimeInMillis();
            cal.setTime(beforeDate);
            time2 = cal.getTimeInMillis();
        }catch(Exception e){
            return 0;
        }
        long between_minutes=(time1-time2)/(1000*60);
        return Integer.parseInt(String.valueOf(between_minutes));
    }

    /**
     * 普通经纪人显示房源的时间
     * @return
     */
    public static Date getGrabListDelayDate() {
        Date beginDate = new Date();
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(beginDate);
        //calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1);
        calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) - Integer.parseInt(Global.DEF_SUNXINGZHE_EARLY_TIME));
        return new Date(calendar.getTime().getTime());

    }

    /**
    * @Title: getFirstTimeOfDay
    * @Description: 获取一天的开始时间
    * @param date
    * @return
        * Date
    * @throws
        * @author zc
    * @date 2015-12-10 下午3:05:44
        */
    public static Date getFirstTimeOfDay(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        return calendar.getTime();
    }

    /**
     * 取一天最后的时间
     * @param date
     * @return
     */
    public static Date getLastTimeOfDay(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        return calendar.getTime();
    }

    /**今天向前推几天
     * @param i
     * @return
     */
    public static Date getBeforeDays(int i){
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, -i);
        return cal.getTime();
    }

    /**
     * 今天与beforeDate相差几天
     * @param beforeDate
     * @return
     */
    public static int todayBetween(Date beforeDate){
        Date date = new Date();
        return daysBetween(date,beforeDate);
    }

    /**
     * 相差几天
     *
     * @param date
     * @param beforeDate
     * @return
     */
    public static int daysBetween(Date date, Date beforeDate) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar cal = Calendar.getInstance();
        long time1 = 0;
        long time2 = 0;
        try {
            cal.setTime(date);
            time1 = cal.getTimeInMillis();
            cal.setTime(beforeDate);
            time2 = cal.getTimeInMillis();
        } catch (Exception e) {
            return 0;
        }
        long between_minutes = (time1 - time2) / (1000 * 60 * 60 * 24);
        return Integer.parseInt(String.valueOf(between_minutes));
    }