Java将时间戳转换为Date对象的方法小结

import java.util.Date;

public class TimeStampToDate {
    public static void main(String[] args) {
        // 假设 receivedInfo.getReceiveTime() 返回的是 long 型的毫秒时间戳
        final Long receiveTime = receivedInfo.getReceiveTime();

        // 将 long 型的时间戳转换为 Date 对象
        Date date = new Date(receiveTime);

        // 打印转换后的日期
        System.out.println("转换后的日期: " + date.toString());
    }
}

if (receiveTime != null) {
    Date date = new Date(receiveTime);
    System.out.println("转换后的日期: " + date.toString());
} else {
    System.out.println("时间戳为null，无法转换");
}

import java.time.Instant;
import java.time.ZonedDateTime;

public class TimeStampToDateJava8 {
    public static void main(String[] args) {
        final Long receiveTime = receivedInfo.getReceiveTime();

        if (receiveTime != null) {
            // 将 long 型的时间戳转换为 Instant 对象
            Instant instant = Instant.ofEpochMilli(receiveTime);

            // 转换为特定时区的 ZonedDateTime 对象
            ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());

            // 打印转换后的日期
            System.out.println("转换后的日期: " + zonedDateTime.toString());
        } else {
            System.out.println("时间戳为null，无法转换");
        }
    }
}