//获取本周的开始时间
public static Date getBeginDayOfWeek() {
    Date date = new Date();
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
    if (dayofweek == 1) {
        dayofweek += 7;
    }
    cal.add(Calendar.DATE, 2 - dayofweek);
    return getDayStartTime(cal.getTime());
}
//获取本周的结束时间
public static Date getEndDayOfWeek(){
    Calendar cal = Calendar.getInstance();
    cal.setTime(getBeginDayOfWeek());
    cal.add(Calendar.DAY_OF_WEEK, 6);
    Date weekEndSta = cal.getTime();
    return getDayEndTime(weekEndSta);
}

//获取某个日期的开始时间
public static Timestamp getDayStartTime(Date d) {
    Calendar calendar = Calendar.getInstance();
    if(null != d) calendar.setTime(d);
    calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
    calendar.set(Calendar.MILLISECOND, 0);
    return new Timestamp(calendar.getTimeInMillis());
}
//获取某个日期的结束时间
public static Timestamp getDayEndTime(Date d) {
    Calendar calendar = Calendar.getInstance();
    if(null != d) calendar.setTime(d);
    calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
    calendar.set(Calendar.MILLISECOND, 999);
    return new Timestamp(calendar.getTimeInMillis());
}