Question

我需要知道 15 或 30 是否介于2个日期之间。如果我有9月29日和10月1日的情况，这应该是真的，因为它将涵盖9月30日。\

我目前的代码：

SimpleDateFormat formatter = new SimpleDateFormat("MM-dd-yyyy");
Date min = formatter.parse("10-29-2017");
Date max = formatter.parse("11-1-2017");
boolean checker = false;
Calendar cal = Calendar.getInstance();
cal.setTime(min);
int minDay = cal.get(Calendar.DAY_OF_MONTH);
cal.setTime(max);
int maxDay = cal.get(Calendar.DAY_OF_MONTH);
for(int i = minDay+1;i<=maxDay;i++){
    if(i==15 || i ==30){
        checker =  true;
    }
}
System.out.println(checker);

这是准确的，除非最小值和最大值类似于上面的样本，它将返回false。

我知道了。谢谢你的所有提示。最终守则：

        SimpleDateFormat formatter = new SimpleDateFormat("MM-dd-yyyy");
        Date min = formatter.parse("10-29-2017");
        Date max = formatter.parse("11-1-2017");
        boolean checker = false;
        Calendar cal = Calendar.getInstance();
        Calendar cal1 = Calendar.getInstance();
        cal.setTime(min);
//      int minDay = cal.get(Calendar.DAY_OF_MONTH);
        cal1.setTime(max);
//      int maxDay = cal.get(Calendar.DAY_OF_MONTH);
        while(cal.before(cal1) && !checker){
            cal.add(Calendar.DAY_OF_MONTH, 1);
            if(cal.get(Calendar.DAY_OF_MONTH)==15 || cal.get(Calendar.DAY_OF_MONTH)==30){
                checker = true;
            }
            System.out.println(cal.getTime());
        }
        System.out.println(checker);

Answer 1

   SimpleDateFormat formatter = new SimpleDateFormat("MM-dd-yyyy");
        Date min = formatter.parse("10-29-2017");
        Date max = formatter.parse("11-1-2017");
        boolean checker = false;
        Calendar cal = Calendar.getInstance();
        Calendar cal1 = Calendar.getInstance();
        cal.setTime(min);
//      int minDay = cal.get(Calendar.DAY_OF_MONTH);
        cal1.setTime(max);
//      int maxDay = cal.get(Calendar.DAY_OF_MONTH);
        while(!checker && cal.before(cal1)){
            cal.add(Calendar.DAY_OF_MONTH, 1);
            if(cal.get(Calendar.DAY_OF_MONTH)==15 || cal.get(Calendar.DAY_OF_MONTH)==30){
                checker = true;
            }
            System.out.println(cal.getTime());
        }
        System.out.println(checker);

Answer 2

这是一个关于如何检查日期是否已经过去的示例

static boolean checkDate(int day){
    DateFormat dateFormat = new SimpleDateFormat("dd");
    Calendar c = Calendar.getInstance();
    int daysInMonth = c.getActualMaximum(Calendar.DAY_OF_MONTH);
    return day <= daysInMonth;
}

Answer 3

使用类似的东西。

SimpleDateFormat formatter = new SimpleDateFormat("MM-dd-yyyy");
    Date min = formatter.parse("10-29-2017");
    Date max = formatter.parse("11-1-2017");
    Date d =  new Date();
    if(d.after(min) && d.before(max)){
        System.out.println("in between");
    }else{
        System.out.println("not in between");
    }

如何检查某些DAY是否在Java中的两个日期之间？

3 个答案: