Question

假设我有2个包含日期的字符串，如下所示

print tmp_crd.data
>>> [-9999. -9999. -9999. ..., -9999. -9999. -9999.]

如何才能使两个日期字符串之间有几分钟的差异？我无法使用 Selenium 在两个字符串之间断言，因为它肯定会让我断言错误。

Answer 1

解析字符串，然后比较毫秒并应用阈值。

但首先，你必须修复那些糟糕的GMT补偿。

String a = "25 Nov 2015 10.50 GMT+6";
String b = "25 Nov 2015 10.45 GMT+6";

// fix bad GMT
a = a.replaceFirst(" GMT\\+(\\d)\\b", " GMT+0$1");
b = b.replaceFirst(" GMT\\+(\\d)\\b", " GMT+0$1");

// parse dates
SimpleDateFormat datefmt = new SimpleDateFormat("d MMM yyyy HH.mm 'GMT'X");
Date dateA = datefmt.parse(a);
Date dateB = datefmt.parse(b);

// detect difference
long diffInMillis = Math.abs(dateA.getTime() - dateB.getTime());
if (diffInMillis < 5 * 60 * 1000) {
    // all is good
} else {
    // bad: 5 or more minutes apart
}

Answer 2

你可以使用下面的比较器来比较大致相等的日期。在实例化比较器时，您可以确定两个日期的增量相等。

public class RoughlyEqualDates implements Comparator<String> {

    int acceptableDelta = 300000; // 5 minutes
    SimpleDateFormat format = new SimpleDateFormat("dd MMM yyyy HH:mm");//choose appropriate format here
    RoughlyEqualDates(int deltaInMins){//configurable delta
        this.acceptableDelta = deltaInMins*60*1000;
    }
    public int compare(String date1, String date2) {
        long d1,d2;
        try {
            d1 = format.parse(date1).getTime();
            d2 = format.parse(date2).getTime();
        } catch (ParseException e) {
            throw new IllegalArgumentException(e);
        }

        if(Math.abs(d1-d2)<=acceptableDelta){
            return 0;
        }else{
            return d1>d2?1:-1;
        }
    }
}

Answer 3

建议的方法很好，但我相信你必须从Date本身获取这些字符串，在这种情况下为什么不试试这个：

Date d1 = <source for String A>;
Date d2 = <source for String B>;
long diff = d2.getTime() - d1.getTime();

//here are the differences
long diffSeconds = diff / 1000 % 60;
long diffMinutes = diff / (60 * 1000) % 60;
long diffHours = diff / (60 * 60 * 1000) % 24;
long diffDays = diff / (24 * 60 * 60 * 1000);

//for your case 
if(diffMinutes <= acceptableDifference) //I' fine with it
else //Give me something else

比较日期和时间与可接受的差异

3 个答案: