localdate 获取本月有多少周

可以使用Java 8中的java.time包中的类来获取本月有多少周。以下是一个示例代码：

import java.time.LocalDate;
import java.time.temporal.TemporalAdjusters;

public class Main {
    public static void main(String[] args) {
        LocalDate today = LocalDate.now();
        LocalDate firstDayOfMonth = today.with(TemporalAdjusters.firstDayOfMonth());
        LocalDate lastDayOfMonth = today.with(TemporalAdjusters.lastDayOfMonth());

        int weeksInMonth = lastDayOfMonth.get(ISOFields.WEEK_OF_WEEK_BASED_YEAR) - firstDayOfMonth.get(ISOFields.WEEK_OF_WEEK_BASED_YEAR) + 1;

        System.out.println("本月有 " + weeksInMonth + " 周");
    }
}

输出结果将显示本月有多少个完整的周。