Jackson: Convert JsonNode object to Map

Using 'convertValue' method of ObjectMapper class, you can convert jsonNode to a map.

Example

Map<String, Object> result = mapper.convertValue(jsonNode, new TypeReference<Map<String, Object>>() {});

App.java

package com.sample.app;

import java.io.IOException;
import java.util.Map;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class App {

    public static void main(String args[]) throws JsonProcessingException, IOException {
        String json = "{\n" + "  \"firstName\" : \"Krishna\",\n" + "  \"lastName\" : \"Gurram\"\n" + "}";

        ObjectMapper mapper = new ObjectMapper();
        JsonNode jsonNode = mapper.readTree(json);

        Map<String, Object> result = mapper.convertValue(jsonNode, new TypeReference<Map<String, Object>>() {
        });

        for (String key : result.keySet()) {
            System.out.println(key + " : " + result.get(key));
        }
    }

}

Output

firstName : Krishna

lastName : Gurram

Previous                                                    Next                                                    Home