localDateTime和timestamp互轉

import java.time.LocalDate;

import java.time.LocalDateTime;

import java.time.ZoneId;

import java.time.ZoneOffset;

public class MainThread {

    public static void main(String[] args) {

     timestamp();

    }

     private static void timestamp(){

            LocalDateTime localDateTime = LocalDateTime.now();

            System.out.println(localDateTime);

            long timestamp = localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli();

    //        轉換成時間戳

            System.out.println(timestamp);

            System.out.println(LocalDateTime.ofInstant(new Date(timestamp).toInstant(),ZoneId.of("Asia/Shanghai")));

    }

}

執行結果： 

Connected to the target VM, address: '127.0.0.1:52743', transport: 'socket'

2018-06-26T15:06:07.804

1529996767804

2018-06-26T15:06:07.804

Disconnected from the target VM, address: '127.0.0.1:52743', transport: 'socket'