Java 8 Convert ZonedDateTime to Timestamp

Java example to convert java.time.ZonedDateTime to java.sql.Timestamp and vice verse.

1. ZonedDateTime -> Timestamp

package com.mkyong.jdbc;
import java.sql.Timestamp;
import java.time.ZonedDateTime;
public class TimeExample1 {
    public static void main(String[] args) {
        ZonedDateTime now = ZonedDateTime.now();
        // 1. ZonedDateTime to TimeStamp
        Timestamp timestamp = Timestamp.valueOf(now.toLocalDateTime());
        // 2. ZonedDateTime to TimeStamp , no different
        Timestamp timestamp2 = Timestamp.from(now.toInstant());
        System.out.println(now);		// 2019-06-19T14:12:13.585294800+08:00[Asia/Kuala_Lumpur]
        System.out.println(timestamp);	// 2019-06-19 14:12:13.5852948
        System.out.println(timestamp2);	// 2019-06-19 14:12:13.5852948

Output

2019-06-19T14:12:13.585294800+08:00[Asia/Kuala_Lumpur]
2019-06-19 14:12:13.5852948
2019-06-19 14:12:13.5852948

2. Timestamp -> ZonedDateTime

package com.mkyong;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TimeExample2 {
    public static void main(String[] args) {
        Timestamp timestamp = Timestamp.from(Instant.now());
        LocalDateTime localDateTimeNoTimeZone = timestamp.toLocalDateTime();
        ZonedDateTime zonedDateTime1 = localDateTimeNoTimeZone.atZone(ZoneId.of("+08:00"));
        ZonedDateTime zonedDateTime2 = localDateTimeNoTimeZone.atZone(ZoneId.of("Asia/Kuala_Lumpur"));
        ZonedDateTime zonedDateTime3 = localDateTimeNoTimeZone.atZone(ZoneId.systemDefault());
        ZonedDateTime zonedDateTime4 = localDateTimeNoTimeZone.atZone(ZoneId.of("-08:00"));
        System.out.println(timestamp);      // 2019-06-19 14:08:23.4458984
        System.out.println(zonedDateTime1); // 2019-06-19T14:08:23.445898400+08:00
        System.out.println(zonedDateTime2); // 2019-06-19T14:08:23.445898400+08:00[Asia/Kuala_Lumpur]
        System.out.println(zonedDateTime3); // 2019-06-19T14:08:23.445898400+08:00[Asia/Kuala_Lumpur]
        System.out.println(zonedDateTime4); // 2019-06-19T14:08:23.445898400-08:00

Output

2019-06-19 14:08:23.4458984
2019-06-19T14:08:23.445898400+08:00
2019-06-19T14:08:23.445898400+08:00[Asia/Kuala_Lumpur]
2019-06-19T14:08:23.445898400+08:00[Asia/Kuala_Lumpur]
2019-06-19T14:08:23.445898400-08:00