ObjectMapper objectMapper = new ObjectMapper();
String json = "{ \"color\" : \"Black\", \"type\" : \"BMW\" }";
Car car = objectMapper.readValue(json, Car.class);

package com.mkyong;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.Map;
public class JacksonMapExample1 { public static void main(String[] args) { ObjectMapper mapper = new ObjectMapper(); String json = "{\"name\":\"mkyong\", \"age\":\"37\"}"; try { // convert JSON string to Map Map<String, String> map = mapper.readValue(json, Map.class);	// it works //Map<String, String> map = mapper.readValue(json, new TypeReference<Map<String, String>>() {}); System.out.println(map); } catch (IOException e) { e.printStackTrace(); } }
}

import com.google.gson.Gson;
import java.lang.reflect.Type;
import java.util.Map;
public class JsonToMapExample { public static void main(String[] args) { String jsonString = "{\"name\": \"John\", \"age\": 30, \"city\": \"New York\"}"; // Create a Gson instance Gson gson = new Gson(); // Define the type of the Map Type mapType = Map.class; // Convert the JSON string to a Map Map<String, Object> map = gson.fromJson(jsonString, mapType); // Print the map for (Map.Entry<String, Object> entry : map.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); } }
}