JSON Accumulate All 

JSON-lib is a java library for serializing and de-serializing java beans, maps, arrays and collections in JSON format. Get the latest binaries from sourceforge http://json-lib.sourceforge.net/. This requires the libraries ( json-lib-2.4-jdk15.jar, xom-1.2.7.jar, ezmorph.jar commons-lang.jar, commons-collections.jar, commons-beanutils-1.7.jar and commons-logging-1.1.1.jar) to be in classpath. The following example shows using accumulateAll method of JSONObject.

File Name  :   com/bethecoder/tutorials/json_lib/tests/JsonAccumulateAll.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.json_lib.tests; import java.util.HashMap; import java.util.Map; import net.sf.json.JSONObject; public class JsonAccumulateAll {   /**    * @param args    */   public static void main(String[] args) {     JSONObject jsonObj = new JSONObject();     jsonObj.put("certificates", "SCJA");     jsonObj.put("prev_ranks", "Rank#2");     System.out.println(jsonObj.toString(2));          Map<String, Object> map = new HashMap<String, Object>();     map.put("certificates", "SCJP");     map.put("prev_ranks", "Rank#1");     jsonObj.accumulateAll(map);          System.out.println(jsonObj.toString(2)); //pretty print with indent   } }

{
  "certificates": "SCJA",
  "prev_ranks": "Rank#2"
}


{
  "certificates":   [
    "SCJA",
    "SCJP"
  ],
  "prev_ranks":   [
    "Rank#2",
    "Rank#1"
  ]
}