import com.google.common.collect.Lists;
import weaver.general.Util;

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.stream.Collectors;


public class Test {
    public static void main(String[] args) {

        List<Map<String,Object>> personGroupOrganizationList = Lists.newArrayList();
        personGroupOrganizationList.add(new HashMap(){{put("dx","4-夜班人员");}});
        personGroupOrganizationList.add(new HashMap(){{put("dx","8-测试条件录入");}});
        Set<String> personGroupIds = personGroupOrganizationList.stream().map(e -> Util.null2String(e.get("dx")).split("-")[0]).collect(Collectors.toSet());
        System.out.println(String.join(",",personGroupIds));
    }

    public static int getDaysBetween(String date1, String date2) {
        LocalDate startDate = LocalDate.parse(date1);
        LocalDate endDate = LocalDate.parse(date2);

        long daysBetween = ChronoUnit.DAYS.between(startDate, endDate);
        return Math.toIntExact(daysBetween);
    }
}