This is a multi-module umbrella project for Jackson modules needed to support Java 8 features, especially with Jackson 2.x that only requires Java 7 for running (and until 2.7 only Java 6).

For Jackson 2.x this includes 3 modules:

• Parameter names: support for detecting constructor and factory method ("creator") parameters without having to use @JsonProperty annotation
  • provides com.fasterxml.jackson.module.paramnames.ParameterNamesModule
• Java 8 Date/time: support for Java 8 date/time types (specified in JSR-310 specification)
  • provides com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
  • ALSO provides legacy variant com.fasterxml.jackson.datatype.jsr310.JSR310TimeModule
  • difference between 2 modules is that of configuration defaults: use of JavaTimeModule strongly recommended for new code
• Java 8 Datatypes: support for other new Java 8 datatypes outside of date/time: most notably Optional, OptionalLong, OptionalDouble
  • provides com.fasterxml.jackson.datatype.jdk8.Jdk8Module

all of which are built from this repository, and accessed and used as separate Jackson modules (with separate Maven artifacts).

Jackson 3.x changes things as it requires Java 8 to work and can thereby directly supported features. Because of this parameter-names and datatypes modules are merged into jackson-databind and need not be registered; datetime module (JavaTimeModule) remains separate module due to its size and configurability options.

All modules are licensed under Apache License 2.0.

To include modules, you use some or all of:

<dependency>
    <groupId>com.fasterxml.jackson.module</groupId>
    <artifactId>jackson-module-parameter-names</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jdk8</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

and either include versions directly, OR, preferably, import Jackson BOM that will specify consistent version set.

ObjectMapper mapper = new ObjectMapper()
   .registerModule(new ParameterNamesModule())
   .registerModule(new Jdk8Module())
   .registerModule(new JavaTimeModule()); // new module, NOT JSR310Module

or, alternatively, you can also auto-discover these modules with:

ObjectMapper mapper = new ObjectMapper();
mapper.findAndRegisterModules();

Either way, after registration all functionality is available for all normal Jackson operations.

WARNING - As of Jackson 2.x, auto-registration will only register older JSR310Module, and not newer JavaTimeModule -- this is due to backwards compatibility. Because of this make sure to either use explicit registration, or, if you want to use JavaTimeModule but also auto-registration, make sure to register JavaTimeModule BEFORE calling mapper.findAndRegisterModules()).

See Wiki for more information (javadocs).