从开始日期到结束日期的周数Java

问题描述：

我试图获取介于Java中给定开始日期和结束日期之间的星期数.这是 ISO8601 日期.

I trying to get the week numbers which fall between a given start date and end date in Java. This is ISO8601 date.

Example 
startDate - "2018-08-24T12:18:06,166"
endDate -  "2019-08-24T11:18:06,166"

当前星期数是34.

对于此示例，我将得到34,35,36 ... 2018年的上周数..1,2 ... 2019年的上周数，依此类推

For this example, I would get 34,35,36... Last week number of 2018..1,2...last week number of 2019 and so on

对此有一个好的解决方案吗?

Is there a good solution to this ?

目前，我可以在相同的年份日期范围内使用它，我尝试的是，我从开始日期和结束日期获取开始周编号和结束周编号，然后循环给出开始值和结束值.但是，如果日期范围是多年，它将如何?谁能帮助我

Presently I got it worked with same year date range, what I tried is, I get the start week number and end week number from the start date and end date, and then I loop it giving the start value and end value. But if the date range falls in multiple years, how would it be? Can any one help me

答

如果您使用的是Java 8，则可以使用

If you are using Java 8 you can use java.time API Like so :

int addWeek = 0;
if(startDate.get(WeekFields.ISO.weekOfYear()) < endDate.get(WeekFields.ISO.weekOfYear())){
    addWeek = 1;
}
long weeks = WEEKS.between(startDate, endDate) + addWeek;//Get the number of weeks in your case (52)
List<Integer> numberWeeks = new ArrayList<>();
if (weeks >= 0) {
    int week = 0;
    do {
        //Get the number of week
        int weekNumber = startDate.plusWeeks(week).get(WeekFields.ISO.weekOfYear());
        numberWeeks.add(weekNumber);
        week++;
    } while (week <= weeks);
}

Ideone演示

[34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 
 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]

请注意，您会同时获得两个年份的两个星期编号，即 2018 [34-52] 的几周，然后是 2019 [1-33]

Note that you get both week numbers from both years, weeks of 2018 [34-52], then weeks of 2019 [1-33]

从开始日期到结束日期的周数Java

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