How to serialize JSON objects in Java

Hi, I'm using Voldemort to store my data My key is a word, and the value is the number of occurrences of the word and URL For example:

key :question
value: 10,www.stackoverflow.com

I'm using the JSON object to place my value My code looks like this

import org.json.JSONObject;
import com.Metaparadigm.jsonrpc.JSONSerializer;
import voldemort.client.ClientConfig;
import voldemort.client.socketStoreClientFactory;
import voldemort.client.StoreClient;
import voldemort.client.StoreClientFactory;

public class ClientExample { 
  public static void main (String [] args) { 
    String bootstrapUrl = "tcp://localhost:6666";

    ClientConfig cc = new ClientConfig (); 
    cc.setBootstrapUrls (bootstrapUrl); 
    String[] valuePair = new String[2];
    int val = 1;
    StoreClientFactory factory = new SocketStoreClientFactory (cc); 
    StoreClient client = factory.getStoreClient("test"); 
    JSONObject json = new JSONObject(); 
    json.put("occurence",val); 
    json.put("url","www.cnn.com"); 
    client.put("foo",json); 
  } 
}

My store XML looks like this

<stores> 
  <store> 
    <name>test</name> 
    <persistence>bdb</persistence> 
    <routing>client</routing> 
    <replication-factor>1</replication-factor> 
    <required-reads>1</required-reads> 
    <required-writes>1</required-writes> 
    <key-serializer> 
      <type>string</type> 
    </key-serializer> 
    <value-serializer> 
      <type>java-serialization</type> 
     <schema-info>"Compount Types"</schema-info> 
    </value-serializer> 
  </store> 
</stores>

When I try to run the code, I get the following exception:**

**

Can you tell me how to serialize JSON objects Thank you in advance

Solution

Look at the gson library It makes good JSON for object mapping and serialization