Library to encode/decode from json to java.util.Map?

Question

Does anyone knows a java library that could easily encode java Maps into json objects and the other way around?

UPDATE

For reasons couldn\'

Answer 1

You can use Google Gson for that. It has excellent support for Generic types.

Here's an SSCCE:

package com.stackoverflow.q2496494;

import java.util.LinkedHashMap;
import java.util.Map;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class Test {

   public static void main(String... args) {
        Map map = new LinkedHashMap();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        Gson gson = new Gson();

        // Serialize.
        String json = gson.toJson(map);
        System.out.println(json); // {"key1":"value1","key2":"value2","key3":"value3"}

        // Deserialize.
        Map map2 = gson.fromJson(json, new TypeToken>() {}.getType());
        System.out.println(map2); // {key1=value1, key2=value2, key3=value3}
    }

}