java根据开始日期结束日期字符串生成中间每天日期集合，加效果

您好，根据您的要求，我可以为您提供以下Java代码示例：

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;

public class DateUtils {
    // 将日期字符串转换为LocalDate对象
    private static LocalDate parseDate(String dateStr, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return LocalDate.parse(dateStr, formatter);
    }

    // 将LocalDate对象转换为日期字符串
    private static String formatDate(LocalDate date, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return date.format(formatter);
    }

    // 获取两个日期之间的所有日期
    public static List<String> getDatesBetween(String startDateStr, String endDateStr, String pattern) {
        List<String> dateList = new ArrayList<>();
        LocalDate startDate = parseDate(startDateStr, pattern);
        LocalDate endDate = parseDate(endDateStr, pattern);

        while (!startDate.isAfter(endDate)) {
            dateList.add(formatDate(startDate, pattern));
            startDate = startDate.plusDays(1);
        }

        return dateList;
    }
}

使用示例：

public static void main(String[] args) {
    String startDateStr = "2022-01-01";
    String endDateStr = "2022-01-10";
    String pattern = "yyyy-MM-dd";

    List<String> dateList = DateUtils.getDatesBetween(startDateStr, endDateStr, pattern);

    for (String dateStr : dateList) {
        System.out.println(dateStr);
    }
}

输出结果：

2022-01-01
2022-01-02
2022-01-03
2022-01-04
2022-01-05
2022-01-06
2022-01-07
2022-01-08
2022-01-09
2022-01-10

希望能够帮助到您！