How to serialize Joda DateTime with Jackson JSON processor

Question

How do I get Jackson to serialize my Joda DateTime object according to a simple pattern  like  dd-MM-yyyy     I ve tried    JsonSerialize using DateTimeSerializer class  private final DateTime date    I ve also tried   ObjectMapper mapper   new ObjectMapper        getSerializationConfig        setDateFormat df     Thanks

User · Answer

Meanwhile Jackson registers the Joda module automatically when the JodaModule is in classpath. I just added jackson-datatype-joda to Maven and it worked instantly.

<dependency>
  <groupId>com.fasterxml.jackson.datatype</groupId>
  <artifactId>jackson-datatype-joda</artifactId>
  <version>2.8.7</version>
</dependency>

JSON output:

{"created" : "2017-03-28T05:59:27.258Z"}

User · Answer

It seems that for Jackson 1 9 12 there is no such possibility by default  because of   public final static class DateTimeSerializer     extends JodaSerializer lt DateTime gt        public DateTimeSerializer     super DateTime class           Override     public void serialize DateTime value  JsonGenerator jgen  SerializerProvider provider          throws IOException  JsonGenerationException               if  provider isEnabled SerializationConfig Feature WRITE DATES AS TIMESTAMPS                 jgen writeNumber value getMillis               else               jgen writeString value toString                           Override     public JsonNode getSchema SerializerProvider provider  java lang reflect Type typeHint                return createSchemaNode provider isEnabled SerializationConfig Feature WRITE DATES AS TIMESTAMPS                     number     string   true             This class serializes data using toString   method of Joda DateTime   Approach proposed by Rusty Kuntz works perfect for my case

User · Answer

This has become very easy with Jackson 2 0 and the Joda module    ObjectMapper mapper   new ObjectMapper    mapper registerModule new JodaModule       Maven dependency    lt dependency gt     lt groupId gt com fasterxml jackson datatype lt  groupId gt     lt artifactId gt jackson-datatype-joda lt  artifactId gt     lt version gt 2 1 1 lt  version gt   lt  dependency gt      Code and documentation  https   github com FasterXML jackson-datatype-joda  Binaries  http   repo1 maven org maven2 com fasterxml jackson datatype jackson-datatype-joda

User · Answer

As  Kimble has said  with Jackson 2  using the default formatting is very easy  simply register JodaModule on your ObjectMapper   ObjectMapper mapper   new ObjectMapper    mapper registerModule new JodaModule       For custom serialization de-serialization of DateTime  you need to implement your own StdScalarSerializer and StdScalarDeserializer  it s pretty convoluted  but anyway    For example  here s a DateTime serializer that uses the ISODateFormat with the UTC time zone   public class DateTimeSerializer extends StdScalarSerializer lt DateTime gt         public DateTimeSerializer             super DateTime class               Override     public void serialize DateTime dateTime                            JsonGenerator jsonGenerator                            SerializerProvider provider  throws IOException  JsonGenerationException           String dateTimeAsString   ISODateTimeFormat withZoneUTC   print dateTime           jsonGenerator writeString dateTimeAsString             And the corresponding de-serializer   public class DateTimeDesrializer extends StdScalarDeserializer lt DateTime gt         public DateTimeDesrializer             super DateTime class               Override     public DateTime deserialize JsonParser jsonParser                                  DeserializationContext deserializationContext  throws IOException  JsonProcessingException           try               JsonToken currentToken   jsonParser getCurrentToken                if  currentToken    JsonToken VALUE STRING                    String dateTimeAsString   jsonParser getText   trim                    return ISODateTimeFormat withZoneUTC   parseDateTime dateTimeAsString                           finally               throw deserializationContext mappingException getValueClass                       Then tie these together with a module   public class DateTimeModule extends SimpleModule        public DateTimeModule             super            addSerializer DateTime class  new DateTimeSerializer             addDeserializer DateTime class  new DateTimeDeserializer               Then register the module on your ObjectMapper   ObjectMapper mapper   new ObjectMapper    mapper registerModule new DateTimeModule

User · Answer

For those with Spring Boot you have to add the module to your context and it will be added to your configuration like this    Bean public Module jodaTimeModule         return new JodaModule        And if you want to use the new java8 time module jsr-310    Bean public Module jodaTimeModule         return new JavaTimeModule

User · Answer

https   stackoverflow com a 10835114 1113510  Although you can put an annotation for each date field  is better to do a global configuration for your object mapper  If you use jackson you can configure your spring as follow    lt bean id  jacksonObjectMapper  class  com company CustomObjectMapper    gt    lt bean id  jacksonSerializationConfig  class  org codehaus jackson map SerializationConfig      factory-bean  jacksonObjectMapper  factory-method  getSerializationConfig   gt   lt  bean gt    For CustomObjectMapper   public class CustomObjectMapper extends ObjectMapper        public CustomObjectMapper             super            configure Feature WRITE DATES AS TIMESTAMPS  false           setDateFormat new SimpleDateFormat  EEE MMM dd yyyy HH mm ss  GMT ZZZ  z                Of course  SimpleDateFormat can use any format you need

User · Answer

The easy solution  I have encountered similar problem and my solution is much clear than above   I simply used the pattern in  JsonFormat annotation  Basically my class has a DateTime field  so I put an annotation around the getter    JsonFormat pattern    yyyy-MM-dd HH mm ss   public DateTime getDate         return date      I serialize the class with ObjectMapper      ObjectMapper mapper   new ObjectMapper        mapper registerModule new JodaModule         mapper disable SerializationFeature WRITE DATES AS TIMESTAMPS       ObjectWriter ow   mapper writer        try           String logStr   ow writeValueAsString log           outLogger info logStr         catch  IOException e            logger warn  JSON mapping exception   e           We use Jackson 2 5 4

User · Answer

I m using Java 8 and this worked for me   Add the dependency on pom xml   lt dependency gt       lt groupId gt com fasterxml jackson datatype lt  groupId gt       lt artifactId gt jackson-datatype-jsr310 lt  artifactId gt       lt version gt 2 4 0 lt  version gt   lt  dependency gt    and add JodaModule on your ObjectMapper  ObjectMapper mapper   new ObjectMapper    mapper registerModule new JodaModule

User · Answer

In the object you re mapping    JsonSerialize using   CustomDateSerializer class  public DateTime getDate             In CustomDateSerializer   public class CustomDateSerializer extends JsonSerializer lt DateTime gt         private static DateTimeFormatter formatter            DateTimeFormat forPattern  dd-MM-yyyy          Override     public void serialize DateTime value  JsonGenerator gen                             SerializerProvider arg2          throws IOException  JsonProcessingException            gen writeString formatter print value

[java] How to serialize Joda DateTime with Jackson JSON processor?

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