LocalDateTime转Date

LocalDateTime localDateTime = LocalDateTime.now();

Date date = Date.from( localDateTime.atZone( ZoneId.systemDefault()).toInstant());

System.out.println(date);

Date转LocalDateTime

Date todayDate = new Date();

LocalDateTime ldt = todayDate.toInstant()
        .atZone( ZoneId.systemDefault() )
        .toLocalDateTime();

System.out.println(ldt);

再省事点就写一个DateUtil类

import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;
 
public class DateUtils {
 
    public static Date asDate(LocalDate localDate) {
        return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
    }
 
    public static Date asDate(LocalDateTime localDateTime) {
        return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
    }
 
    public static LocalDate asLocalDate(Date date) {
        return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDate();
    }
 
    public static LocalDateTime asLocalDateTime(Date date) {
        return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
    }
}