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I have an object graph that I would like to convert to and from JSON and XML, for the purposes of creating a REST-style API. It strikes me that someone must have done this already, but a quick search using Google and Stack Overflow reveals nothing.
Does anyone know of a suitable (Apache or equivalent license preferred) library to do this?
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Converting Java object to JSON In it, create an object of the POJO class, set required values to it using the setter methods. Instantiate the ObjectMapper class. Invoke the writeValueAsString() method by passing the above created POJO object. Retrieve and print the obtained JSON.
GSON from google : http://code.google.com/p/google-gson/,
or
Jackson the library used in spring :https://github.com/FasterXML/jackson
and I would concur with others suggesting jaxb for XML to pojo, well supported lots of tools : its the standard.
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For POJO to XML I suggest using JAXB (there are other libraries as well, such as XStream for example, but JAXB is standardized).
For JSON I don't know anything, but if you want to implement a RESTful API, you might be interested in JSR-311 which defines a server-side API for RESTful APIs and Jersey, which is its reference implementation.
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