LocalDateTime 生成随机的日期，随机时间，随机日期+时间

项目测试用例，需要随机生成一一批日期，LocalDateTime怎么实现呢，以下是实现类

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;

/**
 * @program: ReservedInstance
 * @description: FastoneDateUtil
 * @author: sunyuhua
 * @create: 2021-09-18 15:16
 **/
public class FastoneDateUtil {

 /**
  * 指定开始时间和结束时间，生成指定范围内的时间
  * @param startTime
  * @param endTime
  * @return
  */
 public static LocalTime randomTime(LocalTime startTime, LocalTime endTime) {
  int startSeconds = startTime.toSecondOfDay();
  int endSeconds = endTime.toSecondOfDay();
  int randomTime = ThreadLocalRandom
          .current()
          .nextInt(startSeconds, endSeconds);
  return LocalTime.ofSecondOfDay(randomTime);
 }

 /**
  * 生成随机日期
  * @return
  */
 public static LocalDate randomDay(LocalDate startDate,LocalDate endDate) {
  Random random = new Random();
  int minDay = (int)startDate.toEpochDay();
  int maxDay = (int) endDate.toEpochDay();
  long randomDay = minDay + random.nextInt(maxDay - minDay);
  return LocalDate.ofEpochDay(randomDay);
 }

 /**
  * 返回随机的日期和时间
  * @return
  */
 public static LocalDateTime randomDateTime(){
  return randomDay(LocalDate.of(2021,9,17),LocalDate.of(2021,9,20))
          .atTime(randomTime(LocalTime.of(18,0,59),LocalTime.of(19,0,59)));
 }

}