这段代码确定今天是在一段时间内。基于韩国地区

    Calendar cstart = Calendar.getInstance(Locale.KOREA);
    cstart.clear();
    cstart.set(startyear, startmonth, startday);


    Calendar cend = Calendar.getInstance(Locale.KOREA);
    cend.clear();
    cend.set(endyear, endmonth, endday);

    Calendar c = Calendar.getInstance(Locale.KOREA);

    if(c.after(cstart) && c.before(cend)) {
        // today is in startyear/startmonth/startday ~ endyear/endmonth/endday
    }

Date有前后两种方法，它们之间的比较如下:

if(todayDate.after(historyDate) && todayDate.before(futureDate)) {
    // In between
}

要进行包容性比较:

if(!historyDate.after(todayDate) && !futureDate.before(todayDate)) {
    /* historyDate <= todayDate <= futureDate */ 
}

你也可以试试Joda-Time，但请注意:

Joda-Time是Java SE 8之前的Java事实上的标准日期和时间库。现在要求用户迁移到java。时间(jsr - 310)。

后端端口可用于Java 6和7以及Android。

你可以使用Date.getTime():

返回从格林尼治标准时间1970年1月1日00:00:00开始的毫秒数 由这个Date对象表示。

这意味着你可以像比较数字一样比较它们:

if (date1.getTime() <= date.getTime() && date.getTime() <= date2.getTime()) {
    /*
     * date is between date1 and date2 (both inclusive)
     */
}

/*
 * when date1 = 2015-01-01 and date2 = 2015-01-10 then
 * returns true for:
 * 2015-01-01
 * 2015-01-01 00:00:01
 * 2015-01-02
 * 2015-01-10
 * returns false for:
 * 2014-12-31 23:59:59
 * 2015-01-10 00:00:01
 * 
 * if one or both dates are exclusive then change <= to <
 */

这段代码确定今天是在一段时间内。基于韩国地区

    Calendar cstart = Calendar.getInstance(Locale.KOREA);
    cstart.clear();
    cstart.set(startyear, startmonth, startday);


    Calendar cend = Calendar.getInstance(Locale.KOREA);
    cend.clear();
    cend.set(endyear, endmonth, endday);

    Calendar c = Calendar.getInstance(Locale.KOREA);

    if(c.after(cstart) && c.before(cend)) {
        // today is in startyear/startmonth/startday ~ endyear/endmonth/endday
    }

使用compareTo:

date1.compareTo (date2);

试试这个

public static boolean compareDates(String psDate1, String psDate2) throws ParseException{
        SimpleDateFormat dateFormat = new SimpleDateFormat ("dd/MM/yyyy");
        Date date1 = dateFormat.parse(psDate1);
        Date date2 = dateFormat.parse(psDate2);
        if(date2.after(date1)) {
            return true;
        } else {
            return false;
        }
    }