LocalDate

plus

LocalDate localDate2 = localDate1.plus(15, ChronoUnit.DAYS);

LocalDate localDate2 = localDate1.plus(Period.ofDays(15));

minus

LocalDate localDate2 = localDate1.minus(15, ChronoUnit.DAYS);

LocalDate localDate2 = localDate1.minus(Period.ofDays(15));

比较日期

isAfter(ChronoLocalDate other): 检查此日期是否在给定日期之后。

isBefore(ChronoLocalDate other): 检查此日期是否在给定日期之前。

isEqual(ChronoLocalDate other): 检查此日期是否等于给定日期。

示例

import java.time.LocalDate;

public class LocalDateDemo {
  public static void main(String[] args) {
	LocalDate localDate1 = LocalDate.parse("2018-03-18");
	LocalDate localDate2 = LocalDate.parse("2018-05-12");

	System.out.println(localDate1.isAfter(localDate2));
	System.out.println(localDate1.isBefore(localDate2));
	System.out.println(localDate1.isEqual(localDate2));
  }
} 
		输出
		
		false
		true
		false

LocalDate、Date、LocalDateTime、时间戳的转换

1.LocalDate转Date

LocalDate nowLocalDate = LocalDate.now();
Date date = Date.from(localDate.atStartOfDay(ZoneOffset.ofHours(8)).toInstant());

2.LocalDateTime转Date

LocalDateTime localDateTime = LocalDateTime.now();
Date date = Date.from(localDateTime.atZone(ZoneOffset.ofHours(8)).toInstant());

3.Date转LocalDateTime(LocalDate)

Date date =newDate();
LocalDateTime localDateTime = date.toInstant().atZone(ZoneOffset.ofHours(8)).toLocalDateTime();
LocalDate localDate = date.toInstant().atZone(ZoneOffset.ofHours(8)).toLocalDate();

4.LocalDate转时间戳

LocalDate localDate = LocalDate.now();
longtimestamp = localDate.atStartOfDay(ZoneOffset.ofHours(8)).toInstant().toEpochMilli();

5.LocalDateTime转时间戳

LocalDateTime localDateTime = LocalDateTime.now();
longtimestamp = localDateTime.toInstant(ZoneOffset.ofHours(8)).toEpochMilli();

6.时间戳转LocalDateTime(LocalDate)

longtimestamp = System.currentTimeMillis();
LocalDate localDate = Instant.ofEpochMilli(timestamp).atZone(ZoneOffset.ofHours(8)).toLocalDate();
LocalDateTime localDateTime = Instant.ofEpochMilli(timestamp).atZone(ZoneOffset.ofHours(8)).toLocalDateTime();

链接：https://blog.csdn.net/qq_31635851/article/details/117880835
链接：https://blog.csdn.net/qq_31635851/article/details/117880835