获取本年周数java

在Java中获取当前年份的周数，你可以使用`java.time`包下的`YearWeek`类。首先，你需要创建一个`YearWeek`实例，然后调用其`getWeekOfMonth()`和`getWeekOfYear()`方法来分别得到所在月份的周数和全年的周数。下面是一个简单的示例：

import java.time.LocalDate;
import java.time.WeekFields;
import java.time.YearWeek;

public class CurrentWeekNumber {
    public static void main(String[] args) {
        // 获取当前日期
        LocalDate currentDate = LocalDate.now();
        
        // 使用ISO_week_date规范获取全年周数
        WeekFields weekFields = WeekFields.of(WeekFields.ISO);
        YearWeek yearWeek = YearWeek.of(currentDate.getYear(), currentDate.weekOfWeekBasedYear(weekFields));
        int fullYearWeeks = yearWeek.getWeekOfYear();
        
        // 获取所在月份的周数
        int monthWeeks = yearWeek.getWeekOfMonth();
        
        System.out.println("This year's full-week number is: " + fullYearWeeks);
        System.out.println("Week number within the current month is: " + monthWeeks);
    }
}

运行上述代码，它会输出当前年份的完整周数以及该月内的周数。