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。

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

有一个好的解决方案吗?

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,如果日期范围落在多年内,它将如何?谁能帮我

最佳答案

如果您使用的是Java 8,则可以使用java.time API,如下所示:

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 demo

[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,您从两个年份都获得了两个星期的数字,分别是2018 [34-52]的周和2019 [1-33]的周。

09-25 22:20
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