Convert json string to Java Map(JSONLib)

Question

How can I convert json string to Java Map using JSON-lib(http://json-lib.sourceforge.net/) ? I can convert to DynaBean:

JSONObject jsonObject = (JSONObject) JSONSerializer.toJSON( str );  
DynaBean bean = (DynaBean) JSONSerializer.toJava( jsonObject );

but I have not found a method to convert directly to Java Map

Edit:

I have found the solution:

JSONObject jsonObject = (JSONObject) JSONSerializer.toJSON( str );
Map<String, Object> myMap = (Map<String, Object>) JSONObject.toBean(jsonObject, Map.class)

Can you please post your solution as an answer to your own question and accept it? Cheers. — Samir Talwar, Jun 12 '11 at 20:14

score 21 · Accepted Answer · answered Jun 12 '11 at 20:17

21

Another approach is to take advantage of the fact that a JSONObject implements java.util.Map. So, it is a map.

import java.util.Map;

import net.sf.json.JSONObject;

public class Foo
{
  static String json = "{\"one\":\"won\",\"two\":2,\"three\":false}";

  public static void main(String[] args)
  {
    JSONObject jsonObject = JSONObject.fromObject(json);
    Map map = jsonObject;
    System.out.println(map);
  }
}

answered Jun 12 '11 at 20:17

Programmer Bruce

64,977
7
99
97

Wow, haven't noticed this:) Thanks! – Le_Coeur Jun 12 '11 at 22:25
1

If there's any interest in further decoupling the resulting Map from JSON-lib, note that it's trivial to create a new Map from an existing Map's entries using a copy constructor, such as Map map = new HashMap(jsonObject); – Programmer Bruce Jun 13 '11 at 06:01
1

What if the JSON is nested? – pkanane Aug 26 '13 at 11:43
3

Please Note, this answer is not valid for org.json.JSONArray! – Craig B Mar 26 '14 at 07:24

Convert json string to Java Map(JSONLib)

1 Answers1

Linked