Gson is a library that is provided by Google to help with the serialization and deserialization of Json to and from POJOs (Plain Old Java Objects). This library allows you to model a Java object with the same names as a JSON document and then have Gson return a Java object based upon the JSON. No more manually parsing JSON! Gson also works the other way around — it will take a Java object and convert it to JSON for you. Talk about productive! Download: http://code.google.com/p/google-gson/.