Gson is a Java library that can be used to convert Java Objects into its JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.
There are a few
... [More] open-source projects that can convert Java objects to JSON. However, most of them require that you place Java annotations in your classes something that you can not do if you do not have access to the source-code. Most also do not fully support the use of Java Generics. Gson considers both of these as very important design goals.
Gson Goals Provide simple toJson() and fromJson() methods to convert Java objects to JSON and vice-versa Allow pre-existing unmodifiable objects to be converted to and [Less]
jsonschema2pojo uses the structural rules present in a JSON Schema document to generate DTO style Java classes.
The classes produced by jsonschema2pojo are ideal for use with JSON parser/generator libraries such as Jackson that can marshal data from Java objects into JSON content (and
... [More] vice-versa). Creating the necessary Java objects and keeping these in sync with your schema is trivial with jsonschema2pojo, and because the schema drives the process you can be sure that you're honouring your contract. [Less]
A java library that adds some very useful features to Gson, like Date serializing to unix timestamp or RFC3339, method (getters) serialization, pre/post processors and many others. Check out the documentation to learn how to use it!
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