How to parse a JSON string into JsonNode in Jackson?

Question

It should be so simple, but I just cannot find it after being trying for an hour #embarrasing.

I need to get a JSON string, for example, {\"k1\":v1,\"k2\":v2}<

Answer 1

You need to use an ObjectMapper:

ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = mapper.getJsonFactory(); // since 2.1 use mapper.getFactory() instead
JsonParser jp = factory.createJsonParser("{\"k1\":\"v1\"}");
JsonNode actualObj = mapper.readTree(jp);

Further documentation about creating parsers can be found here.