Jackson Dates with Time Zones

JacksonDatesWithTimeZones.java

package org.wildfly.quickstarts.helloworld;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import org.junit.Test;

import java.io.IOException;
import java.time.ZoneId;
import java.time.ZonedDateTime;

import static junit.framework.TestCase.assertEquals;

/* You need the following dependency:
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

 */

public class JacksonDatesWithTimeZones {
    @Test
    public void whenDeserialisingZonedDateTimeWithDefaults_thenNotCorrect()
            throws IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.registerModule(new JavaTimeModule());
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.enable(SerializationFeature.WRITE_DATES_WITH_ZONE_ID);
        objectMapper.disable(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE);
        ZonedDateTime now = ZonedDateTime.now(ZoneId.of("Europe/Berlin"));
        String converted = objectMapper.writeValueAsString(now);

        ZonedDateTime restored = objectMapper.readValue(converted, ZonedDateTime.class);
        System.out.println("input: " + now);
        System.out.println("serialized: " + converted);
        System.out.println("restored: " + restored);
        assertEquals(now, restored);
    }
}