java - Object to Json including only fields not null -

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i have object named item plenty of fields. i'm using java json (json-io) library serialize state in file:

string json = jsonwriter.objecttojson(item); // write string file

i'd make json string less verbose not include null values (if possible boolean false). possible somehow ?
thanks

i can recommend using jackson mapper if possible. check out these 2 questions:

jackson serialization: ignore empty values (or null)

how tell jackson ignore field during serialization if value null?


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