DateTimeDeserializeSample.java

package sample;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Date;

/**
 * To simplify object mapper instantiation, run this with spring-boot-starter-web as dependency :D.
 *
 * If you use Spring Boot 1.5.x, don't forget to add dependencies from https://github.com/FasterXML/jackson-modules-java8
 *
 * Sample output :
 *
 * {"timezone":"GMT","timestamp":"2018-08-07 09:32:08 GMT"}
 * {"timezone":"GMT+8","timestamp":"2018-08-07 17:32:08 GMT+08:00"}
 * {"utcTime":"2018-08-07 09:32:08 UTC","plusFive":"2018-08-07 14:32:08 GMT+05:00","plusSix":"2018-08-07 15:32:08 GMT+06:00","plusSeven":"2018-08-07 16:32:08 GMT+07:00"}
 */
@SpringBootApplication
public class DateTimeDeserializeSample {
    public static void main(String[] args) {
        SpringApplication.run(DateTimeDeserializeSample.class);
    }

    @Component
    static class DeserializeRunner implements ApplicationRunner {
        private static final Logger LOGGER = LoggerFactory.getLogger(DeserializeRunner.class);

        @Autowired
        private ObjectMapper objectMapper;

        @Override
        public void run(ApplicationArguments args) throws Exception {
            ZonedDateTime dateTime = ZonedDateTime.of(LocalDateTime.now(), ZoneId.of("GMT+7"));

            LOGGER.info(objectMapper.writeValueAsString(new WithGmtPlusZeroDateTime(dateTime)));
            LOGGER.info(objectMapper.writeValueAsString(new WithGmtPlusEightDateTime(dateTime)));

            LOGGER.info(objectMapper.writeValueAsString(new DeserializeLegacyDate(new Date())));
        }
    }

    public static class WithGmtPlusZeroDateTime {
        private final String timezone = "GMT";

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z", timezone = "GMT")
        private final ZonedDateTime timestamp;

        public WithGmtPlusZeroDateTime(ZonedDateTime timestamp) {
            this.timestamp = timestamp;
        }

        public String getTimezone() {
            return timezone;
        }

        public ZonedDateTime getTimestamp() {
            return timestamp;
        }
    }

    public static class WithGmtPlusEightDateTime {
        private final String timezone = "GMT+8";

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z", timezone = "GMT+8")
        private final ZonedDateTime timestamp;

        public WithGmtPlusEightDateTime(ZonedDateTime timestamp) {
            this.timestamp = timestamp;
        }

        public String getTimezone() {
            return timezone;
        }

        public ZonedDateTime getTimestamp() {
            return timestamp;
        }
    }

    /**
     * By default, java.util.Date deserialized in utc time.
     */
    public static class DeserializeLegacyDate {
        private final Date timestamp;

        public DeserializeLegacyDate(Date timestamp) {
            this.timestamp = timestamp;
        }

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z")
        public Date getUtcTime() {
            return timestamp;
        }

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z", timezone = "GMT+5")
        public Date getPlusFive() {
            return timestamp;
        }

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z", timezone = "GMT+6")
        public Date getPlusSix() {
            return timestamp;
        }

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss z", timezone = "GMT+7")
        public Date getPlusSeven() {
            return timestamp;
        }
    }
}