How to convert HashMap to JsonNode with Jackson?

Question

I have a HashMap object which I want to convert to JsonNode tree using com.fasterxml.jackson.databind.ObjectMapper. What is the best w

Answer 1

The following will do the trick:

JsonNode jsonNode = mapper.convertValue(map, JsonNode.class);

Or use the more elegant solution pointed in the comments:

JsonNode jsonNode = mapper.valueToTree(map);

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If you need to write your jsonNode as a string, use:

String json = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);