RESTful Java Web Services - Third Edition

Using streaming APIs to generate JSON

You can use javax.json.stream.JsonGenerator to write JSON data to an output source as a stream of tokens. This approach does not keep the content in memory throughout the process. Once a name-value pair is written to the stream, the content used for wiring the name-value pair will be discarded from the memory.

JsonGenerator has support for writing both the JSON object and the JSON array. You can use the writeStartObject() method to generate the JSON object and then add the name-value pairs with the write() method. To finish the object representation, call writeEnd().

To generate the JSON arrays, call the writeStartArray() method and then, add values with the write() method. To finish the array representation, ...