java 获取两个日期之间的所有日期字符串

可以使用Java 8中的日期时间 API，使用`LocalDate`类和`ChronoUnit`枚举类来获取两个日期之间的所有日期字符串。下面是一个示例代码：

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

public class DateUtils {
    public static List<String> getDatesBetween(String startDate, String endDate, String pattern) {
        List<String> dates = new ArrayList<>();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        LocalDate start = LocalDate.parse(startDate, formatter);
        LocalDate end = LocalDate.parse(endDate, formatter);
        long days = ChronoUnit.DAYS.between(start, end);
        for (int i = 0; i <= days; i++) {
            LocalDate date = start.plusDays(i);
            dates.add(date.format(formatter));
        }
        return dates;
    }
}

使用方法：

List<String> dates = DateUtils.getDatesBetween("2022-01-01", "2022-01-10", "yyyy-MM-dd");
for (String date : dates) {
    System.out.println(date);
}

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