根据两个日期之间获取LocalDate日历列表和LocalDate和LocalDateTime数据格式转换

根据两个日期之间获取LocalDate日历列表和LocalDate和LocalDateTime数据格式转换

package com.example.core.mydemo.localdatetime;
 
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
 
/**
 * 根据两个日期之间，获取该日期之间的每天的日期格式
 * LocalDate和LocalDateTime数据格式转换
 * output:
 * 2024-10-01
 * 2024-10-02
 * 2024-10-03
 * 2024-10-04
 * 2024-10-05
 * ldt=2024-05-22T10:00
 * ldtStr=2024-05-22 10:00:00
 */
public class LocalDateTest {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
 
        //开始
        Long start = 20241001L;
        //结束
        Long end = 20241005L;
        if(start.longValue() == end.longValue()){
            LocalDate ldStart = parseStringToLocalDate(String.valueOf(start),"yyyyMMdd");
            list.add(formatLocalDateToString(ldStart,"yyyy-MM-dd"));
        }else if(start < end){
            LocalDate ldStart = parseStringToLocalDate(String.valueOf(start),"yyyyMMdd");
            LocalDate ldEnd = parseStringToLocalDate(String.valueOf(end),"yyyyMMdd");
            list.add(formatLocalDateToString(ldStart,"yyyy-MM-dd"));
//            list.add(formatLocalDateToString(ldEnd,"yyyy-MM-dd"));
            LocalDate ldMiddle = ldStart;
            while (true){
                LocalDate nextDay = ldMiddle.plusDays(1);
                list.add(formatLocalDateToString(nextDay,"yyyy-MM-dd"));
                //终止循环
                if (nextDay.isEqual(ldEnd)) {
                    break;
                }
                //递增
                ldMiddle = nextDay;
            }
        }
 
        //默认升序,去重
          list =  list.stream().distinct().sorted().collect(Collectors.toList());
//        Collections.sort(list);
 
        // 输出排序后的列表
        for (String str : list) {
            System.out.println(str);
        }
 
        //LocalDateTime测试
        LocalDateTime ldt = parseStringToLocalDateTime("20240522100000","yyyyMMddHHmmss");
        System.out.println("ldt=" + ldt);
        String ldtStr = formatLocalDateTimeToString(ldt,"yyyy-MM-dd HH:mm:ss");
        System.out.println("ldtStr=" + ldtStr);
    }
 
    /**
     * LocalDate转换
     * @param date
     * @param format
     * @return
     */
    public static LocalDate parseStringToLocalDate(String date,String format) {
        return LocalDate.parse(date, DateTimeFormatter.ofPattern(format));
    }
 
    public static String formatLocalDateToString(LocalDate localDate,String format) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
        return localDate.format(formatter);
    }
 
    /**
     * 同理  LocalDateTime
     * @param date
     * @param format
     * @return
     */
    public static LocalDateTime parseStringToLocalDateTime(String date,String format) {
        return LocalDateTime.parse(date, DateTimeFormatter.ofPattern(format));
    }
 
    public static String formatLocalDateTimeToString(LocalDateTime localDateTime,String format) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format);
        return localDateTime.format(formatter);
    }
 
}